首页 > 最新文献

Science of Remote Sensing最新文献

英文 中文
Divergent GPP dynamics in alpine and temperate grasslands: Hierarchical climatic controls across the Qinghai-Tibetan and Mongolian Plateaus 高寒和温带草原GPP动态差异:青藏高原和蒙古高原的分层气候控制
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2025-12-25 DOI: 10.1016/j.srs.2025.100360
Yusi Zhang , Gang Bao , Zhonghua He , Yuhai Bao , Zhihui Yuan , Siqin Tong
Alpine grasslands on the Qinghai-Tibet Plateau and temperate grasslands on the Mongolian Plateau are key components of the global carbon cycle but differ markedly in their responses to climate change. To investigate the spatiotemporal variations in Gross Primary Productivity (GPP) and their response to climate change in these two types of grasslands, we developed a novel Random Forest Regression-Light Use Efficiency-Solar Induced Fluorescence (RFR-LUE-SIF) model that integrates machine-learning regression with physiological efficiency principles and satellite-derived SIF observations. This framework bridges tower-based GPP observations with large-scale remote-sensing estimates, improving model interpretability and accuracy. The model reproduced observed GPP with high fidelity (R2 = 0.91), identifying EVI, NIRv, and GOSIF as the most influential predictors. Spatially, alpine grassland GPP decreases from southeast to northwest, while temperate grassland GPP declines from northeast to southwest. From 2001 to 2023, both grassland types exhibited increasing GPP trends, with temperate grasslands showing a faster rise, indicating stronger climatic sensitivity. Further, partial correlation analysis and Structural Equation Modeling (SEM) reveal that alpine grassland productivity is generally more sensitive to temperature, particularly under adequate moisture conditions, whereas temperate grasslands exhibited stronger dependence on precipitation and vapor pressure deficit (VPD). The proposed RFR-LUE-SIF model provides a scalable, data-driven, and physiologically consistent approach for assessing grassland carbon dynamics and their hierarchical climatic responses across contrasting ecosystems.
青藏高原高寒草原和蒙古高原温带草原是全球碳循环的重要组成部分,但对气候变化的响应存在显著差异。为了研究这两种草地的总初级生产力(GPP)的时空变化及其对气候变化的响应,我们建立了一种新的随机森林回归-光利用效率-太阳诱导荧光(RFR-LUE-SIF)模型,该模型将机器学习回归与生理效率原理和卫星衍生的SIF观测相结合。该框架将基于塔的GPP观测与大尺度遥感估算相结合,提高了模型的可解释性和准确性。该模型高保真地再现了观测到的GPP (R2 = 0.91),确定EVI、NIRv和GOSIF是最具影响力的预测因子。从空间上看,高寒草地GPP从东南向西北递减,温带草地GPP从东北向西南递减。2001 - 2023年,两种草地类型的GPP均呈上升趋势,其中温带草地上升较快,气候敏感性更强。此外,偏相关分析和结构方程模型(SEM)表明,高寒草地生产力总体上对温度更敏感,特别是在水分充足的条件下,而温带草地生产力对降水和水汽压亏缺(VPD)的依赖性更强。提出的RFR-LUE-SIF模型提供了一种可扩展的、数据驱动的、生理上一致的方法来评估草地碳动态及其在不同生态系统中的分层气候响应。
{"title":"Divergent GPP dynamics in alpine and temperate grasslands: Hierarchical climatic controls across the Qinghai-Tibetan and Mongolian Plateaus","authors":"Yusi Zhang ,&nbsp;Gang Bao ,&nbsp;Zhonghua He ,&nbsp;Yuhai Bao ,&nbsp;Zhihui Yuan ,&nbsp;Siqin Tong","doi":"10.1016/j.srs.2025.100360","DOIUrl":"10.1016/j.srs.2025.100360","url":null,"abstract":"<div><div>Alpine grasslands on the Qinghai-Tibet Plateau and temperate grasslands on the Mongolian Plateau are key components of the global carbon cycle but differ markedly in their responses to climate change. To investigate the spatiotemporal variations in Gross Primary Productivity (GPP) and their response to climate change in these two types of grasslands, we developed a novel Random Forest Regression-Light Use Efficiency-Solar Induced Fluorescence (RFR-LUE-SIF) model that integrates machine-learning regression with physiological efficiency principles and satellite-derived SIF observations. This framework bridges tower-based GPP observations with large-scale remote-sensing estimates, improving model interpretability and accuracy. The model reproduced observed GPP with high fidelity (R<sup>2</sup> = 0.91), identifying EVI, NIRv, and GOSIF as the most influential predictors. Spatially, alpine grassland GPP decreases from southeast to northwest, while temperate grassland GPP declines from northeast to southwest. From 2001 to 2023, both grassland types exhibited increasing GPP trends, with temperate grasslands showing a faster rise, indicating stronger climatic sensitivity. Further, partial correlation analysis and Structural Equation Modeling (SEM) reveal that alpine grassland productivity is generally more sensitive to temperature, particularly under adequate moisture conditions, whereas temperate grasslands exhibited stronger dependence on precipitation and vapor pressure deficit (VPD). The proposed RFR-LUE-SIF model provides a scalable, data-driven, and physiologically consistent approach for assessing grassland carbon dynamics and their hierarchical climatic responses across contrasting ecosystems.</div></div>","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100360"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Satellite-derived seasonal fluctuations in surface displacement and soil moisture: Implications for landslide activity 地表位移和土壤湿度的卫星季节性波动:对滑坡活动的影响
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2025-12-17 DOI: 10.1016/j.srs.2025.100354
Chiao-Yin Lu , Yu-Chang Chan , Chung-Ray Chu , Che-Hsin Liu , Shih-Chiang Lee , Yu-Chung Hsieh , Jyr-Ching Hu , Chih-Hsin Chang
Seasonal surface fluctuations are commonly influenced by environmental variations, with both water presence and geological conditions playing key roles in surface deformation. These short-term signals often complicate the interpretation of time series data, particularly in complex and mountainous regions where in situ hydrological data such as groundwater levels, pore water pressure, and soil moisture are scarce or difficult to obtain. This study investigates two representative slow-moving landslides exhibiting seasonal variations by applying the small baseline subset (SBAS) method, one of the core approaches within the multitemporal InSAR (MTInSAR) framework. The SBAS-derived time series are further analyzed in combination with satellite-derived soil moisture data. Given the limited availability of high-resolution hydrological observations, satellite-derived soil moisture was adopted as a validated proxy to represent the average hydrological conditions over each landslide area. The results reveal notable patterns of seasonal surface fluctuations driven by hydrological variations, and demonstrate that their expression is further modulated by lithological conditions. Based on available data, we infer that in sedimentary rock areas, a high water storage coefficient causes hydrological loading to dominate seasonal surface displacement, resulting in a negative correlation. In contrast, pore water pressure plays a dominant role in metamorphic rock areas, leading to a positive correlation. This study demonstrates the potential of satellite-derived hydrological data to complement InSAR time series in regions with scarce in situ monitoring. These findings offer valuable and useful insights for a further understanding slow-moving landslide behaviors, particularly in distinguishing and identifying accelerated movement signals from seasonal fluctuations, and for improving slope failure early warning systems.
季节性地表波动通常受到环境变化的影响,水的存在和地质条件在地表变形中起着关键作用。这些短期信号往往使时间序列数据的解释复杂化,特别是在地下水水位、孔隙水压力和土壤湿度等原位水文数据稀缺或难以获得的复杂山区。本研究通过应用multitemporal InSAR (MTInSAR)框架内的核心方法之一——小基线子集(SBAS)方法,调查了两个具有代表性的表现出季节性变化的缓慢移动滑坡。sbas导出的时间序列与卫星导出的土壤湿度数据结合进一步分析。鉴于高分辨率水文观测的可用性有限,采用卫星获得的土壤湿度作为有效的代理来代表每个滑坡区的平均水文条件。结果揭示了由水文变化驱动的季节地表波动的显著模式,并表明其表达进一步受到岩性条件的调节。根据现有数据,我们推断在沉积岩区,高储水系数导致水文负荷主导季节性地表位移,形成负相关。而在变质岩区孔隙水压力起主导作用,两者呈正相关关系。这项研究表明,卫星衍生水文数据在缺乏现场监测的地区补充InSAR时间序列的潜力。这些发现为进一步理解缓慢移动的滑坡行为提供了有价值和有用的见解,特别是在区分和识别季节性波动中的加速运动信号,以及改进边坡破坏早期预警系统方面。
{"title":"Satellite-derived seasonal fluctuations in surface displacement and soil moisture: Implications for landslide activity","authors":"Chiao-Yin Lu ,&nbsp;Yu-Chang Chan ,&nbsp;Chung-Ray Chu ,&nbsp;Che-Hsin Liu ,&nbsp;Shih-Chiang Lee ,&nbsp;Yu-Chung Hsieh ,&nbsp;Jyr-Ching Hu ,&nbsp;Chih-Hsin Chang","doi":"10.1016/j.srs.2025.100354","DOIUrl":"10.1016/j.srs.2025.100354","url":null,"abstract":"<div><div>Seasonal surface fluctuations are commonly influenced by environmental variations, with both water presence and geological conditions playing key roles in surface deformation. These short-term signals often complicate the interpretation of time series data, particularly in complex and mountainous regions where in situ hydrological data such as groundwater levels, pore water pressure, and soil moisture are scarce or difficult to obtain. This study investigates two representative slow-moving landslides exhibiting seasonal variations by applying the small baseline subset (SBAS) method, one of the core approaches within the multitemporal InSAR (MTInSAR) framework. The SBAS-derived time series are further analyzed in combination with satellite-derived soil moisture data. Given the limited availability of high-resolution hydrological observations, satellite-derived soil moisture was adopted as a validated proxy to represent the average hydrological conditions over each landslide area. The results reveal notable patterns of seasonal surface fluctuations driven by hydrological variations, and demonstrate that their expression is further modulated by lithological conditions. Based on available data, we infer that in sedimentary rock areas, a high water storage coefficient causes hydrological loading to dominate seasonal surface displacement, resulting in a negative correlation. In contrast, pore water pressure plays a dominant role in metamorphic rock areas, leading to a positive correlation. This study demonstrates the potential of satellite-derived hydrological data to complement InSAR time series in regions with scarce in situ monitoring. These findings offer valuable and useful insights for a further understanding slow-moving landslide behaviors, particularly in distinguishing and identifying accelerated movement signals from seasonal fluctuations, and for improving slope failure early warning systems.</div></div>","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100354"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Discriminating winter wheat yellow rust and Fusarium head blight using Sentinel-2 imagery at a regional scale 利用Sentinel-2遥感影像在区域尺度上判别冬小麦黄锈病和赤霉病
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2026-01-17 DOI: 10.1016/j.srs.2026.100371
Zhiqin Gui , Huiqin Ma , Jingcheng Zhang , Wenjiang Huang , Lin Yuan , Kehui Ren
<div><div>Yellow rust (<em>Puccinia striiformis</em> f. sp. <em>Tritici</em>, YR) and Fusarium head blight (<em>Fusarium graminearum</em>, FHB) are two major wheat diseases. These two diseases frequently pose concurrent risks to grain security, particularly in high-yielding wheat regions of eastern China. Accurate regional-scale discrimination of wheat YR and FHB is essential for developing effective green and intelligent disease management strategies. While satellite remote sensing shows potential for regional crop disease monitoring, conventional machine learning modeling approaches widely employed often fail to exploit the spectral-spatial information inherent in imagery. Meanwhile, the scarcity of ground-based disease survey samples limits the application of emerging sample-driven deep learning methods. This study evaluated the effectiveness of 27 sample-feature-algorithm combinatorial modeling strategies for discriminating regional-scale wheat YR and FHB using Sentinel-2 imagery. We augmented disease samples using a stepwise approach that combines marking diseased field vector boundaries with sliding window segmentation (SWS), horizontal-vertical flipping (HVF), and multi-angle rotation (MAR). Recursive feature elimination with cross-validation (RFECV) was employed to optimize spectral and textural features, yielding in two distinct feature sets: disease-sensitive spectral features (SFs) and spectral-textural combined features (STCFs). The original spectral bands (OSBs) served as a third feature set. These sample sets and feature sets were input into several fundamentally distinct algorithms to construct wheat YR and FHB discrimination models. These include three commonly used machine learning (ML) methods, namely, support vector machine (SVM), random forest (RF), and extreme gradient boosting (XGBoost). Additionally, include two deep learning methods, namely, the two-dimensional convolutional neural network (2D-CNN) and the spectral-spatial attention network (SSAN). The results indicated that three ML algorithms exhibited stable performance across all three feature sets under SWS-based sample augmentation. SVM yielded the best overall accuracy, but texture features provided only limited improvement over the SVM model compared with RF and XGBoost. The OSBs outperformed SFs and STCFs in 2D-CNN and SSAN modeling, achieving an overall accuracy (OA) comparable to that of SVM under SWS + HVF + MAR-based sample augmentation. Specifically, the SWS + HVF + MAR-OSBs-SSAN model demonstrated superior performance metrics. This model achieved an average accuracy of 81.8 %, a Kappa coefficient of 0.704, a G-means of 0.892, and an F1-score of 81.1 %. These accuracy results surpassed those of the SWS-STCFS-SVM model, even though the latter achieved the highest OA of 82.8 %. Sample augmentation yielded limited gains in modeling for the 2D-CNN but demonstrated more significant gains for the SSAN. Overall, the STCFs-based SVM modeling strategy remains preferab
小麦黄锈病(锈病)和小麦赤霉病(枯萎病)是小麦的两种主要病害。这两种疾病经常同时对粮食安全构成威胁,特别是在中国东部的小麦高产地区。小麦小麦赤霉病和小麦赤霉病在区域尺度上的准确判别是制定有效的绿色和智能病害管理策略的必要条件。虽然卫星遥感显示出区域作物病害监测的潜力,但广泛采用的传统机器学习建模方法往往无法利用图像中固有的光谱空间信息。同时,地面疾病调查样本的稀缺性限制了新兴的样本驱动深度学习方法的应用。本研究评估了27种样本-特征-算法组合建模策略在Sentinel-2图像上区分区域尺度小麦YR和FHB的有效性。我们使用一种将标记病场矢量边界与滑动窗口分割(SWS)、水平-垂直翻转(HVF)和多角度旋转(MAR)相结合的逐步方法来增强疾病样本。采用递归特征消除与交叉验证(RFECV)来优化光谱和纹理特征,得到两个不同的特征集:疾病敏感光谱特征(sf)和光谱-纹理组合特征(stcf)。原始光谱波段(osb)作为第三个特征集。这些样本集和特征集被输入到几个基本不同的算法中,以构建小麦YR和FHB识别模型。其中包括三种常用的机器学习(ML)方法,即支持向量机(SVM)、随机森林(RF)和极端梯度增强(XGBoost)。此外,还包括两种深度学习方法,即二维卷积神经网络(2D-CNN)和频谱空间注意网络(SSAN)。结果表明,在基于sws的样本增强下,三种ML算法在所有三个特征集上都表现出稳定的性能。SVM获得了最好的整体精度,但与RF和XGBoost模型相比,纹理特征提供的改进有限。osb在2D-CNN和SSAN建模中优于SFs和stcf,在基于SWS + HVF + mar的样本增强下实现了与SVM相当的整体精度(OA)。具体来说,SWS + HVF + MAR-OSBs-SSAN模型表现出卓越的性能指标。该模型的平均准确率为81.8%,Kappa系数为0.704,g均值为0.892,f1得分为81.1%。这些精度结果超过了SWS-STCFS-SVM模型,尽管后者达到了最高的OA(82.8%)。样本增强在2D-CNN建模中产生有限的收益,但在SSAN中显示出更显著的收益。总体而言,基于stcfs的SVM建模策略在样本约束下仍然是优选的,而基于osbs的SSAN建模策略在进一步的样本扩充下更具竞争力。我们的研究结果为改进区域尺度作物生物胁迫识别提供了有价值的见解。
{"title":"Discriminating winter wheat yellow rust and Fusarium head blight using Sentinel-2 imagery at a regional scale","authors":"Zhiqin Gui ,&nbsp;Huiqin Ma ,&nbsp;Jingcheng Zhang ,&nbsp;Wenjiang Huang ,&nbsp;Lin Yuan ,&nbsp;Kehui Ren","doi":"10.1016/j.srs.2026.100371","DOIUrl":"10.1016/j.srs.2026.100371","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Yellow rust (&lt;em&gt;Puccinia striiformis&lt;/em&gt; f. sp. &lt;em&gt;Tritici&lt;/em&gt;, YR) and Fusarium head blight (&lt;em&gt;Fusarium graminearum&lt;/em&gt;, FHB) are two major wheat diseases. These two diseases frequently pose concurrent risks to grain security, particularly in high-yielding wheat regions of eastern China. Accurate regional-scale discrimination of wheat YR and FHB is essential for developing effective green and intelligent disease management strategies. While satellite remote sensing shows potential for regional crop disease monitoring, conventional machine learning modeling approaches widely employed often fail to exploit the spectral-spatial information inherent in imagery. Meanwhile, the scarcity of ground-based disease survey samples limits the application of emerging sample-driven deep learning methods. This study evaluated the effectiveness of 27 sample-feature-algorithm combinatorial modeling strategies for discriminating regional-scale wheat YR and FHB using Sentinel-2 imagery. We augmented disease samples using a stepwise approach that combines marking diseased field vector boundaries with sliding window segmentation (SWS), horizontal-vertical flipping (HVF), and multi-angle rotation (MAR). Recursive feature elimination with cross-validation (RFECV) was employed to optimize spectral and textural features, yielding in two distinct feature sets: disease-sensitive spectral features (SFs) and spectral-textural combined features (STCFs). The original spectral bands (OSBs) served as a third feature set. These sample sets and feature sets were input into several fundamentally distinct algorithms to construct wheat YR and FHB discrimination models. These include three commonly used machine learning (ML) methods, namely, support vector machine (SVM), random forest (RF), and extreme gradient boosting (XGBoost). Additionally, include two deep learning methods, namely, the two-dimensional convolutional neural network (2D-CNN) and the spectral-spatial attention network (SSAN). The results indicated that three ML algorithms exhibited stable performance across all three feature sets under SWS-based sample augmentation. SVM yielded the best overall accuracy, but texture features provided only limited improvement over the SVM model compared with RF and XGBoost. The OSBs outperformed SFs and STCFs in 2D-CNN and SSAN modeling, achieving an overall accuracy (OA) comparable to that of SVM under SWS + HVF + MAR-based sample augmentation. Specifically, the SWS + HVF + MAR-OSBs-SSAN model demonstrated superior performance metrics. This model achieved an average accuracy of 81.8 %, a Kappa coefficient of 0.704, a G-means of 0.892, and an F1-score of 81.1 %. These accuracy results surpassed those of the SWS-STCFS-SVM model, even though the latter achieved the highest OA of 82.8 %. Sample augmentation yielded limited gains in modeling for the 2D-CNN but demonstrated more significant gains for the SSAN. Overall, the STCFs-based SVM modeling strategy remains preferab","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100371"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146037869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculation of surface roughness using machine learning algorithms combined with knowledge distillation 结合知识蒸馏的机器学习算法计算表面粗糙度
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2026-01-05 DOI: 10.1016/j.srs.2026.100368
Jianyong Cui , Wenwen Gao , Chunlei Meng
Surface roughness is a key parameter in meteorological simulations and wind energy assessments, and its spatial distribution is influenced by various factors. However, the complexity of these factors makes it difficult to retrieve roughness. Although machine learning methods have partially addressed this issue, they still face the challenge of insufficient measurement data. To tackle this, the present study proposes a knowledge distillation framework that integrates physical models and machine learning. It establishes a “teacher-student” model to enable knowledge transfer from regions with sufficient data to target regions with zero samples. In the source domain, where abundant ground truth data is available, four models-Random Forest, Support Vector Regression, Multi-layer Perceptron, and Transformer—were trained. The Multi-layer Perceptron, which achieved the best performance (correlation coefficient: 0.81, RMSE: 0.74, MAE: 0.51), was selected as the teacher model. Then, using the knowledge distillation method, soft labels were generated from remote sensing data in the target region to guide the training of the student model. This facilitated cross-domain knowledge transfer. The results show that the student model's training accuracy improved to 0.89, with the RMSE and MAE reduced to 0.62 and 0.33, respectively, significantly outperforming the teacher model. Compared to ERA5 reanalysis data and land surface model results, the student model's inversion of surface roughness in the target region reduced the mean absolute error by approximately 18 %, effectively solving the parameter estimation problem under the condition of no measurement samples. This study significantly enhances the accuracy of surface roughness estimation and provides more reliable parameter input for meteorological simulations and numerical weather forecasting.
地表粗糙度是气象模拟和风能评价的关键参数,其空间分布受多种因素的影响。然而,这些因素的复杂性使得粗糙度很难恢复。虽然机器学习方法已经部分解决了这个问题,但它们仍然面临着测量数据不足的挑战。为了解决这个问题,本研究提出了一个集成物理模型和机器学习的知识蒸馏框架。建立“师生”模型,实现知识从数据充足的区域向零样本的目标区域转移。在源域,有丰富的地面真值数据可用,四个模型-随机森林,支持向量回归,多层感知器和变压器-被训练。选择表现最佳的多层感知器(相关系数:0.81,RMSE: 0.74, MAE: 0.51)作为教师模型。然后,利用知识蒸馏方法,从目标区域的遥感数据中生成软标签,指导学生模型的训练。这促进了跨领域的知识转移。结果表明,学生模型的训练准确率提高到0.89,RMSE和MAE分别降低到0.62和0.33,显著优于教师模型。与ERA5再分析数据和地表模型结果相比,学生模型反演目标区域表面粗糙度的平均绝对误差降低了约18%,有效解决了无测量样本条件下的参数估计问题。该研究显著提高了地表粗糙度估算的精度,为气象模拟和数值天气预报提供了更可靠的参数输入。
{"title":"Calculation of surface roughness using machine learning algorithms combined with knowledge distillation","authors":"Jianyong Cui ,&nbsp;Wenwen Gao ,&nbsp;Chunlei Meng","doi":"10.1016/j.srs.2026.100368","DOIUrl":"10.1016/j.srs.2026.100368","url":null,"abstract":"<div><div>Surface roughness is a key parameter in meteorological simulations and wind energy assessments, and its spatial distribution is influenced by various factors. However, the complexity of these factors makes it difficult to retrieve roughness. Although machine learning methods have partially addressed this issue, they still face the challenge of insufficient measurement data. To tackle this, the present study proposes a knowledge distillation framework that integrates physical models and machine learning. It establishes a “teacher-student” model to enable knowledge transfer from regions with sufficient data to target regions with zero samples. In the source domain, where abundant ground truth data is available, four models-Random Forest, Support Vector Regression, Multi-layer Perceptron, and Transformer—were trained. The Multi-layer Perceptron, which achieved the best performance (correlation coefficient: 0.81, RMSE: 0.74, MAE: 0.51), was selected as the teacher model. Then, using the knowledge distillation method, soft labels were generated from remote sensing data in the target region to guide the training of the student model. This facilitated cross-domain knowledge transfer. The results show that the student model's training accuracy improved to 0.89, with the RMSE and MAE reduced to 0.62 and 0.33, respectively, significantly outperforming the teacher model. Compared to ERA5 reanalysis data and land surface model results, the student model's inversion of surface roughness in the target region reduced the mean absolute error by approximately 18 %, effectively solving the parameter estimation problem under the condition of no measurement samples. This study significantly enhances the accuracy of surface roughness estimation and provides more reliable parameter input for meteorological simulations and numerical weather forecasting.</div></div>","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100368"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advancing vegetation segmentation from ALS point clouds: From benchmarking to GreenSegNet-A 从ALS点云推进植被分割:从基准到GreenSegNet-A
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2026-01-30 DOI: 10.1016/j.srs.2026.100382
Aditya Aditya , Bharat Lohani , Jagannath Aryal , Stephan Winter
Accurate large-scale vegetation segmentation is essential to maintain vegetation inventories, which are vital for informed ecological planning, landscape management, and long-term sustainability and liveability of the environment. Advancements in deep learning (DL) coupled with the increasing availability of airborne laser scanning (ALS) point clouds hold significant potential for detailed and large-scale vegetation segmentation. Yet, ALS-based vegetation segmentation has received limited attention, leading to ambiguity in model selection. To address this research gap, we present a comprehensive benchmarking of point-based DL models for vegetation segmentation. Seven representative DL models, KPConv, RandLANet, SCFNet, PointNeXt, SPoTr, PointMetaBase, and GreenSegNet, have been implemented on three different datasets, Eclair, Dales, and WHU-Urban3D. Evaluated through a ten-fold cross-validation strategy, the results reveal strong but inconsistent performances. KPConv records the highest mean intersection over union (mIoU) on the Eclair dataset with 96.24% while GreenSegNet dominates on Dales dataset, reaching 93.91%. GreenSegNet also outperforms other models on the WHU-Urban3D dataset, achieving a mIoU of 79.27%. These findings highlight both the promise and the limitations of existing models, including the vegetation-specific GreenSegNet, which also exhibited inconsistent behavior on ALS data due to sparsity, nadir-view perspective, and canopy occlusions. Building on these insights, we propose GreenSegNet-A, a DL architecture explicitly tailored for ALS vegetation segmentation. Incorporated with a novel ALS-adaptive module, GreenSegNet-A achieves mIoU scores of 96.56% (Eclair), 94.29% (Dales), and 80.87% (WHU-Urban3D). Statistical tests confirm its efficacy, while ablation studies validate the design choices. Although the model has a slightly higher parameter count than GreenSegNet, it remains lighter compared to other models. Overall, GreenSegNet-A establishes a strong performance baseline for ALS vegetation segmentation within the scope of our evaluation. The source code is available at this URL.
准确的大规模植被分割对于维持植被清单至关重要,这对于明智的生态规划、景观管理以及环境的长期可持续性和宜居性至关重要。深度学习(DL)的进步,加上机载激光扫描(ALS)点云的日益可用性,为详细和大规模的植被分割提供了巨大的潜力。然而,基于als的植被分割受到的关注有限,导致模型选择存在歧义。为了解决这一研究缺口,我们提出了基于点的植被分割深度学习模型的综合基准测试。七个代表性的深度学习模型,KPConv, RandLANet, SCFNet, PointNeXt, SPoTr, PointMetaBase和GreenSegNet,已经在三个不同的数据集,Eclair, Dales和WHU-Urban3D上实现。通过十倍交叉验证策略进行评估,结果显示出强大但不一致的性能。KPConv在Eclair数据集上的mIoU均值最高,达到96.24%,而GreenSegNet在Dales数据集上的mIoU均值最高,达到93.91%。GreenSegNet在WHU-Urban3D数据集上也优于其他模型,mIoU达到79.27%。这些发现突出了现有模型的前景和局限性,包括植被特异性GreenSegNet,由于稀疏性、最低点视角和树冠遮挡,该模型在ALS数据上也表现出不一致的行为。基于这些见解,我们提出了GreenSegNet-A,这是一个专门为ALS植被分割量身定制的深度学习架构。结合一种新颖的als自适应模块,GreenSegNet-A的mIoU得分分别为96.56% (Eclair)、94.29% (Dales)和80.87% (WHU-Urban3D)。统计测试证实了其有效性,而消融研究证实了设计选择。尽管该模型的参数数比GreenSegNet略高,但与其他模型相比,它仍然更轻。总的来说,GreenSegNet-A在我们的评估范围内为ALS植被分割建立了一个强大的性能基线。源代码可在此URL获得。
{"title":"Advancing vegetation segmentation from ALS point clouds: From benchmarking to GreenSegNet-A","authors":"Aditya Aditya ,&nbsp;Bharat Lohani ,&nbsp;Jagannath Aryal ,&nbsp;Stephan Winter","doi":"10.1016/j.srs.2026.100382","DOIUrl":"10.1016/j.srs.2026.100382","url":null,"abstract":"<div><div>Accurate large-scale vegetation segmentation is essential to maintain vegetation inventories, which are vital for informed ecological planning, landscape management, and long-term sustainability and liveability of the environment. Advancements in deep learning (DL) coupled with the increasing availability of airborne laser scanning (ALS) point clouds hold significant potential for detailed and large-scale vegetation segmentation. Yet, ALS-based vegetation segmentation has received limited attention, leading to ambiguity in model selection. To address this research gap, we present a comprehensive benchmarking of point-based DL models for vegetation segmentation. Seven representative DL models, KPConv, RandLANet, SCFNet, PointNeXt, SPoTr, PointMetaBase, and GreenSegNet, have been implemented on three different datasets, Eclair, Dales, and WHU-Urban3D. Evaluated through a ten-fold cross-validation strategy, the results reveal strong but inconsistent performances. KPConv records the highest mean intersection over union (mIoU) on the Eclair dataset with 96.24% while GreenSegNet dominates on Dales dataset, reaching 93.91%. GreenSegNet also outperforms other models on the WHU-Urban3D dataset, achieving a mIoU of 79.27%. These findings highlight both the promise and the limitations of existing models, including the vegetation-specific GreenSegNet, which also exhibited inconsistent behavior on ALS data due to sparsity, nadir-view perspective, and canopy occlusions. Building on these insights, we propose GreenSegNet-A, a DL architecture explicitly tailored for ALS vegetation segmentation. Incorporated with a novel ALS-adaptive module, GreenSegNet-A achieves mIoU scores of 96.56% (Eclair), 94.29% (Dales), and 80.87% (WHU-Urban3D). Statistical tests confirm its efficacy, while ablation studies validate the design choices. Although the model has a slightly higher parameter count than GreenSegNet, it remains lighter compared to other models. Overall, GreenSegNet-A establishes a strong performance baseline for ALS vegetation segmentation within the scope of our evaluation. The source code is available at <span><span>this URL</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100382"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel approach to assessing the tracking accuracy of crop phenology for multi-orbit and multi-feature Sentinel-1 time series 基于多轨道多特征Sentinel-1时间序列作物物候跟踪精度评估新方法
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2026-01-13 DOI: 10.1016/j.srs.2026.100370
Johannes Löw , Christopher Conrad , Steven Hill , Michael Thiel , Tobias Ullmann , Insa Otte
This study presents a novel framework for quantifying uncertainties and variabilities related to the monitoring of crop phenology via Synthetic Aperture Radar (SAR) time series at the field scale. Therefore, the study investigated multi-orbit, multi-feature time series derived from Sentinel-1 (S1) VV/VH polarizations. This multi-feature approach encompasses backscatter intensity, interferometric coherence and alpha/entropy decomposition features. Crop phenology tracking is crucial for assessing agricultural resilience under climate change, yet existing approaches face challenges due to uncertainties and variability in SAR signal interpretation as well as in situ data. Building on previous landscape-level analyses, this work introduces the concept of trackability, defined as the temporal range during which SAR-derived time-series metrics (TSM), such as breakpoints in backscatter intensity or interferometric coherence, align with key phenological stages (e.g., stem elongation in winter wheat). A growing degree day (GDD)-based normalization contextualizes field-specific deviations relative to landscape averages, enabling quantification of uncertainties inherent in both SAR signals and ground observations. The framework captures the spatio-temporally variable nature of crop development by estimating the first and last phenologically relevant TSM occurrence within a defined uncertainty window, thus providing relational and relative indicators of phenological tracking. This approach reduces dependencies of extensive in situ data and enhances comparability across studies with differing SAR processing methods and their acquisition geometries. Results reproduce known feature-stage relationships (e.g., tracking for stem elongation by interferometric coherence) and reveal inter-seasonal variability influenced by weather conditions and acquisition parameters. On average relevant TSM occurrences were found at approximately 90 % of GDD progression of in situ reported phenological stages, while systematic differences of around 5 % by relative orbit were discovered. The study highlights the potential of integrating multiple S1 features and orbits without optimization-induced information loss, producing quality masks that identify optimal tracking performance at the field level. This framework advances SAR-based phenology monitoring by offering scalable, transferable insights for precision agriculture, while practical implementation still requires detailed field boundaries and early-season crop management information.
本研究提出了一种新的框架,用于量化田间尺度上合成孔径雷达(SAR)时间序列作物物候监测的不确定性和可变性。因此,该研究研究了Sentinel-1 (S1) VV/VH极化衍生的多轨道、多特征时间序列。这种多特征方法包括后向散射强度、干涉相干性和α /熵分解特征。作物物候跟踪对于评估气候变化下的农业恢复力至关重要,但由于SAR信号解释和原位数据的不确定性和可变性,现有方法面临挑战。在之前的景观级分析的基础上,本研究引入了可追踪性的概念,其定义为sar衍生的时间序列指标(TSM)的时间范围,如后向散射强度或干涉相干性的断点,与关键物候阶段(如冬小麦的茎伸长)一致。基于日数增长(GDD)的归一化处理了相对于景观平均值的特定区域偏差,从而可以量化SAR信号和地面观测中固有的不确定性。该框架通过在确定的不确定性窗口内估算第一次和最后一次物候相关的TSM发生来捕捉作物发育的时空变化性质,从而提供物候跟踪的相关和相对指标。这种方法减少了大量原位数据的依赖性,并增强了不同SAR处理方法及其获取几何形状的研究之间的可比性。结果再现了已知的特征阶段关系(例如,通过干涉相干跟踪茎伸长),并揭示了受天气条件和采集参数影响的季节间变化。平均而言,相关的TSM发生在约90%的原位报告物候阶段的GDD进展中,而相对轨道的系统差异约为5%。该研究强调了整合多个S1特征和轨道的潜力,而不会导致优化引起的信息损失,从而产生在现场水平上识别最佳跟踪性能的质量掩模。该框架通过为精准农业提供可扩展、可转移的见解,推进了基于sar的物候监测,而实际实施仍然需要详细的田地边界和早期作物管理信息。
{"title":"A novel approach to assessing the tracking accuracy of crop phenology for multi-orbit and multi-feature Sentinel-1 time series","authors":"Johannes Löw ,&nbsp;Christopher Conrad ,&nbsp;Steven Hill ,&nbsp;Michael Thiel ,&nbsp;Tobias Ullmann ,&nbsp;Insa Otte","doi":"10.1016/j.srs.2026.100370","DOIUrl":"10.1016/j.srs.2026.100370","url":null,"abstract":"<div><div>This study presents a novel framework for quantifying uncertainties and variabilities related to the monitoring of crop phenology via Synthetic Aperture Radar (SAR) time series at the field scale. Therefore, the study investigated multi-orbit, multi-feature time series derived from Sentinel-1 (S1) VV/VH polarizations. This multi-feature approach encompasses backscatter intensity, interferometric coherence and alpha/entropy decomposition features. Crop phenology tracking is crucial for assessing agricultural resilience under climate change, yet existing approaches face challenges due to uncertainties and variability in SAR signal interpretation as well as in situ data. Building on previous landscape-level analyses, this work introduces the concept of trackability, defined as the temporal range during which SAR-derived time-series metrics (TSM), such as breakpoints in backscatter intensity or interferometric coherence, align with key phenological stages (e.g., stem elongation in winter wheat). A growing degree day (GDD)-based normalization contextualizes field-specific deviations relative to landscape averages, enabling quantification of uncertainties inherent in both SAR signals and ground observations. The framework captures the spatio-temporally variable nature of crop development by estimating the first and last phenologically relevant TSM occurrence within a defined uncertainty window, thus providing relational and relative indicators of phenological tracking. This approach reduces dependencies of extensive in situ data and enhances comparability across studies with differing SAR processing methods and their acquisition geometries. Results reproduce known feature-stage relationships (e.g., tracking for stem elongation by interferometric coherence) and reveal inter-seasonal variability influenced by weather conditions and acquisition parameters. On average relevant TSM occurrences were found at approximately 90 % of GDD progression of in situ reported phenological stages, while systematic differences of around 5 % by relative orbit were discovered. The study highlights the potential of integrating multiple S1 features and orbits without optimization-induced information loss, producing quality masks that identify optimal tracking performance at the field level. This framework advances SAR-based phenology monitoring by offering scalable, transferable insights for precision agriculture, while practical implementation still requires detailed field boundaries and early-season crop management information.</div></div>","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100370"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of ground deformation in Mandalay, Myanmar, using InSAR with Sentinel-1 data after the March 2025 earthquake 基于InSAR和Sentinel-1数据的缅甸曼德勒2025年3月地震后地面变形评估
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2025-12-24 DOI: 10.1016/j.srs.2025.100358
Behzad Taghi-Lou, Michael Schultz, Andreas Braun, Volker Hochschild
This study quantifies coseismic ground deformation associated with the March 28, 2025 earthquake sequence (Mw 6.7–7.7) in the Mandalay Region of Myanmar. Differential interferometric synthetic-aperture radar (DInSAR) was applied to Sentinel-1A single-look complex (SLC) data, using pre-event images acquired six and four days before the earthquakes and post-event images acquired five and nineteen days after. The interferograms were processed in ESA SNAP, phase-unwrapped with SNAPHU, and geocoded using the 30 m SRTM digital elevation model (DEM). A coherence threshold of 0.35 was applied to ensure reliable phase retrieval. Peak line-of-sight (LOS) displacements reach +0.24 m (uplift) and −0.62 m (subsidence) for the ascending pair, and +0.22 m (uplift) and −0.64 m (subsidence) for the descending pair. Decomposition of the paired LOS maps yields vertical motion between +0.74 m and −1.57 m and east–west offsets between −1.99 m (westward) and +1.29 m (eastward), corresponding to a horizontal-to-vertical displacement ratio of 1.27. The deformation field closely follows the surface trace of the dextral Sagaing Fault, confirming it as the primary seismogenic structure. Opposite-sense deformation is observed across the fault, with subsidence and eastward motion on the western block and uplift and westward motion on the eastern block. These results provide a high-resolution deformation field for this event and highlight the value of open-access Sentinel-1 data for rapid seismic hazard assessment in data-scarce regions.
本研究量化了与2025年3月28日缅甸曼德勒地区地震序列(Mw 6.7-7.7)相关的同震地面变形。差分干涉合成孔径雷达(DInSAR)应用于Sentinel-1A单视复合体(SLC)数据,使用地震前6天和4天获取的事件前图像以及地震后5天和19天获取的事件后图像。干涉图在ESA SNAP中进行处理,使用SNAPHU进行相位解包裹,并使用30 m SRTM数字高程模型(DEM)进行地理编码。相干阈值为0.35,保证了相位恢复的可靠性。上升对的峰值视线位移达到+0.24 m(隆升)和- 0.62 m(沉降),下降对的峰值视线位移达到+0.22 m(隆升)和- 0.64 m(沉降)。对成对的LOS地图进行分解,得到垂直运动在+0.74 m和- 1.57 m之间,东西偏移量在- 1.99 m(向西)和+1.29 m(向东)之间,对应的水平与垂直位移比为1.27。变形场与右旋实皆断层的地表轨迹密切相关,证实了实皆断层是主要的发震构造。整个断层呈现相反意义的变形,西部地块为沉降东移,东部地块为隆升西移。这些结果为该事件提供了高分辨率变形场,并突出了开放获取的Sentinel-1数据对数据稀缺地区快速地震危害评估的价值。
{"title":"Assessment of ground deformation in Mandalay, Myanmar, using InSAR with Sentinel-1 data after the March 2025 earthquake","authors":"Behzad Taghi-Lou,&nbsp;Michael Schultz,&nbsp;Andreas Braun,&nbsp;Volker Hochschild","doi":"10.1016/j.srs.2025.100358","DOIUrl":"10.1016/j.srs.2025.100358","url":null,"abstract":"<div><div>This study quantifies coseismic ground deformation associated with the March 28, 2025 earthquake sequence (Mw 6.7–7.7) in the Mandalay Region of Myanmar. Differential interferometric synthetic-aperture radar (DInSAR) was applied to Sentinel-1A single-look complex (SLC) data, using pre-event images acquired six and four days before the earthquakes and post-event images acquired five and nineteen days after. The interferograms were processed in ESA SNAP, phase-unwrapped with SNAPHU, and geocoded using the 30 m SRTM digital elevation model (DEM). A coherence threshold of 0.35 was applied to ensure reliable phase retrieval. Peak line-of-sight (LOS) displacements reach +0.24 m (uplift) and −0.62 m (subsidence) for the ascending pair, and +0.22 m (uplift) and −0.64 m (subsidence) for the descending pair. Decomposition of the paired LOS maps yields vertical motion between +0.74 m and −1.57 m and east–west offsets between −1.99 m (westward) and +1.29 m (eastward), corresponding to a horizontal-to-vertical displacement ratio of 1.27. The deformation field closely follows the surface trace of the dextral Sagaing Fault, confirming it as the primary seismogenic structure. Opposite-sense deformation is observed across the fault, with subsidence and eastward motion on the western block and uplift and westward motion on the eastern block. These results provide a high-resolution deformation field for this event and highlight the value of open-access Sentinel-1 data for rapid seismic hazard assessment in data-scarce regions.</div></div>","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100358"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Establishing a hyperspectral library for Hong Kong mangroves: Species differentiation and leaf decay dynamics 建立香港红树林高光谱文库:物种分化和叶片腐烂动态
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2026-01-02 DOI: 10.1016/j.srs.2025.100362
Tahir Sattar , Majid Nazeer , Man Sing Wong , Janet Elizabeth Nichol , Xiaolin Zhu
Mangroves are the resistant species found in the intertidal zones, providing ecosystem services such as protection of shorelines, provision of habitats to flora and fauna, and contributing to nutrient cycling. Study of their leaf properties has always been challenging, but this has been facilitated by the advent of Hyperspectral Imaging (HSI) systems. In such a context, this study undertook the development of a hyperspectral library offering the reflectance characteristics for adaxial and abaxial surfaces of mangrove species found in Hong Kong, on the temporal scale of seven days to facilitate the species identification and monitor the leaf decay. This library contained species level data, plot level data, and decay level data. Field surveys in fifteen plots (900 m2 each) conducted in the Eastern and Western regions of Hong Kong collected hyperspectral data of five mangrove species, namely: Ceriops tagal, Kandelia obovata, Avicennia marina, Avicennia germinans, and Aegiceras corniculatum, using two different types of HSI systems i.e., Specim IQ (in-field data) and NEO Hyspex (in-lab data) hyperspectral cameras. A comparison of sensors unveiled a notably higher reflectance in field collected data than that of the lab-collected data, with a range of 11.8 % (Kandelia obovate) to 73.1 % (Aegiceras corniculatum). The Root Mean Square Error (RMSE) indicated deviation between the two sensors, i.e., 0.211 for Ceriops tagal, followed by Kandelia obovata (0.233), Avicennia marina (0.317), Avicennia germinans, and Aegiceras corniculatum (0.349). This freely available comprehensive hyperspectral library will serve as the foundation for training datasets to achieve automated classification with enhanced accuracy. This open access hyperspectral library will assist the researchers to relate the physiological and anatomical variations in leaves with the changes in hyperspectral reflectance on the temporal scale.
红树林是在潮间带发现的抗性物种,提供生态系统服务,如保护海岸线,为动植物提供栖息地,并促进营养循环。对其叶片特性的研究一直具有挑战性,但高光谱成像(HSI)系统的出现促进了这一点。在此背景下,本研究开发了一个高光谱文库,提供了香港红树林物种在7天时间尺度上的正面和背面反射率特征,以方便物种鉴定和监测叶片腐烂。该库包含种级数据、样地级数据和衰变级数据。在香港东部和西部地区的15个样地(每个样地900平方米)进行实地调查,使用两种不同类型的高光谱相机,即Specim IQ(现场数据)和NEO Hyspex(实验室数据),收集了5种红树林的高光谱数据,即:Ceriops tagal, Kandelia obovata, Avicennia marina, Avicennia germinans和Aegiceras corniculatum。通过对传感器的比较发现,野外采集数据的反射率明显高于实验室采集数据,反射率范围为11.8%(倒卵形Kandelia倒卵形)至73.1%(角状Aegiceras corniculatum)。均方根误差(RMSE)表明,两种传感器之间的偏差值为:龙舌兰(ceriiops tagal)为0.211,其次是大鲵(Kandelia obovata)(0.233)、海棠(Avicennia marina)(0.317)、龙舌兰(Avicennia germinans)和龙舌兰(Aegiceras corniculatum)(0.349)。这个免费提供的综合高光谱库将作为训练数据集的基础,以实现更高精度的自动分类。这个开放获取的高光谱文库将帮助研究人员在时间尺度上将叶片的生理解剖变化与高光谱反射率的变化联系起来。
{"title":"Establishing a hyperspectral library for Hong Kong mangroves: Species differentiation and leaf decay dynamics","authors":"Tahir Sattar ,&nbsp;Majid Nazeer ,&nbsp;Man Sing Wong ,&nbsp;Janet Elizabeth Nichol ,&nbsp;Xiaolin Zhu","doi":"10.1016/j.srs.2025.100362","DOIUrl":"10.1016/j.srs.2025.100362","url":null,"abstract":"<div><div>Mangroves are the resistant species found in the intertidal zones, providing ecosystem services such as protection of shorelines, provision of habitats to flora and fauna, and contributing to nutrient cycling. Study of their leaf properties has always been challenging, but this has been facilitated by the advent of Hyperspectral Imaging (HSI) systems. In such a context, this study undertook the development of a hyperspectral library offering the reflectance characteristics for adaxial and abaxial surfaces of mangrove species found in Hong Kong, on the temporal scale of seven days to facilitate the species identification and monitor the leaf decay. This library contained species level data, plot level data, and decay level data. Field surveys in fifteen plots (900 m<sup>2</sup> each) conducted in the Eastern and Western regions of Hong Kong collected hyperspectral data of five mangrove species, namely: <em>Ceriops tagal</em>, <em>Kandelia obovata, Avicennia marina, Avicennia germinans, and Aegiceras corniculatum,</em> using two different types of HSI systems i.e., Specim IQ (in-field data) and NEO Hyspex (in-lab data) hyperspectral cameras. A comparison of sensors unveiled a notably higher reflectance in field collected data than that of the lab-collected data, with a range of 11.8 % (Kandelia obovate) to 73.1 % (<em>Aegiceras corniculatum</em>). The Root Mean Square Error (RMSE) indicated deviation between the two sensors, i.e., 0.211 for <em>Ceriops tagal</em>, followed by <em>Kandelia obovata</em> (0.233), <em>Avicennia marina</em> (0.317), <em>Avicennia germinans</em>, and <em>Aegiceras corniculatum</em> (0.349). This freely available comprehensive hyperspectral library will serve as the foundation for training datasets to achieve automated classification with enhanced accuracy. This open access hyperspectral library will assist the researchers to relate the physiological and anatomical variations in leaves with the changes in hyperspectral reflectance on the temporal scale.</div></div>","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100362"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Weed classification in sugarcane fields in Northeast Thailand from multi-temporal Sentinel-1 and Sentinel-2 data together with random forest algorithm 基于Sentinel-1和Sentinel-2数据的泰国东北部甘蔗田杂草分类研究
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2025-12-09 DOI: 10.1016/j.srs.2025.100352
Savittri Ratanopad Suwanlee , Muhammad Hanif , Kemin Kasa , Surasak Keawsomsee , Jaturong Som-ard , Vorraveerukorn Veerachitt , Phattamon Heawchaiyaphum , Akkawat Puntura , Mohammad D. Hossain , Sarawut Ninsawat
Timely and accurate weed detection is essential for sustainable crop production and management. The integration of multiple satellite data sources with powerful machine learning has transformed precision agriculture by enhancing the accuracy and automation of object classification, enabling large-scale analysis and real-time predictions. However, challenges remain in effectively managing agricultural practices, particularly in weed control. This study employed Sentinel-1 (S1) and Sentinel-2 (S2) satellite data, combined with vegetation indices and random forest (RF) classification algorithm, to map weed presence in sugarcane fields in Northeastern Thailand. The large number of reference data consisting of 744 points was utilized to train and validate weed identification. The combined S1 and S2 dataset significantly enhanced the detection capabilities of the best RF model, achieving an overall classification result of 96 % accuracy and F1 scores exceeding 93 %. While overall weed levels were low, several high-density zones were clearly detected, underscoring the importance of targeted weed management. The combination of S1 and S2 data improved classification performance, addressing challenges posed by mixed pixels in small fields. Stratifying weed density provided deeper insights into field variability over the large scale. Our work presents a scientifically robust and operationally scalable framework for monitoring weed infestations in sugarcane cultivation. The proposed approach demonstrates strong potential for advancing sustainable precision agriculture by facilitating timely and spatially precise interventions.
及时准确的杂草检测对作物的可持续生产和管理至关重要。将多个卫星数据源与强大的机器学习相结合,通过提高目标分类的准确性和自动化,实现大规模分析和实时预测,改变了精准农业。然而,在有效管理农业实践方面,特别是在杂草控制方面,仍然存在挑战。本研究利用Sentinel-1 (S1)和Sentinel-2 (S2)卫星数据,结合植被指数和随机森林(RF)分类算法,绘制了泰国东北部甘蔗田杂草分布图。利用744个点的大量参考数据对杂草识别进行训练和验证。结合S1和S2数据集显著增强了最佳RF模型的检测能力,总体分类结果准确率达到96%,F1得分超过93%。虽然总体杂草水平较低,但清楚地发现了几个高密度区,强调了有针对性的杂草管理的重要性。S1和S2数据的结合提高了分类性能,解决了小域内混合像素带来的挑战。对杂草密度进行分层可以更深入地了解大规模的田间变异性。我们的工作提出了一个科学可靠和可扩展的框架,用于监测甘蔗种植中的杂草侵害。所提出的方法通过促进及时和空间上精确的干预,显示了推进可持续精准农业的巨大潜力。
{"title":"Weed classification in sugarcane fields in Northeast Thailand from multi-temporal Sentinel-1 and Sentinel-2 data together with random forest algorithm","authors":"Savittri Ratanopad Suwanlee ,&nbsp;Muhammad Hanif ,&nbsp;Kemin Kasa ,&nbsp;Surasak Keawsomsee ,&nbsp;Jaturong Som-ard ,&nbsp;Vorraveerukorn Veerachitt ,&nbsp;Phattamon Heawchaiyaphum ,&nbsp;Akkawat Puntura ,&nbsp;Mohammad D. Hossain ,&nbsp;Sarawut Ninsawat","doi":"10.1016/j.srs.2025.100352","DOIUrl":"10.1016/j.srs.2025.100352","url":null,"abstract":"<div><div>Timely and accurate weed detection is essential for sustainable crop production and management. The integration of multiple satellite data sources with powerful machine learning has transformed precision agriculture by enhancing the accuracy and automation of object classification, enabling large-scale analysis and real-time predictions. However, challenges remain in effectively managing agricultural practices, particularly in weed control. This study employed Sentinel-1 (S1) and Sentinel-2 (S2) satellite data, combined with vegetation indices and random forest (RF) classification algorithm, to map weed presence in sugarcane fields in Northeastern Thailand. The large number of reference data consisting of 744 points was utilized to train and validate weed identification. The combined S1 and S2 dataset significantly enhanced the detection capabilities of the best RF model, achieving an overall classification result of 96 % accuracy and F1 scores exceeding 93 %. While overall weed levels were low, several high-density zones were clearly detected, underscoring the importance of targeted weed management. The combination of S1 and S2 data improved classification performance, addressing challenges posed by mixed pixels in small fields. Stratifying weed density provided deeper insights into field variability over the large scale. Our work presents a scientifically robust and operationally scalable framework for monitoring weed infestations in sugarcane cultivation. The proposed approach demonstrates strong potential for advancing sustainable precision agriculture by facilitating timely and spatially precise interventions.</div></div>","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100352"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impacts of using solar spectra adjusted for solar cycle variability in the radiometric correction of retrieved multi-band parameters from ETM+/Landsat-7 data 利用经太阳周期变率调整的太阳光谱对ETM+/Landsat-7数据反演的多波段参数进行辐射校正的影响
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-06-01 Epub Date: 2026-02-05 DOI: 10.1016/j.srs.2026.100384
Jonathan Gil Müller, Alexander Christian Vibrans
{"title":"Impacts of using solar spectra adjusted for solar cycle variability in the radiometric correction of retrieved multi-band parameters from ETM+/Landsat-7 data","authors":"Jonathan Gil Müller,&nbsp;Alexander Christian Vibrans","doi":"10.1016/j.srs.2026.100384","DOIUrl":"10.1016/j.srs.2026.100384","url":null,"abstract":"","PeriodicalId":101147,"journal":{"name":"Science of Remote Sensing","volume":"13 ","pages":"Article 100384"},"PeriodicalIF":5.2,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Science of Remote Sensing
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1