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A globally applicable deep learning model for Sentinel-2 cloud and shadow detection 一种全球适用的Sentinel-2云和阴影检测深度学习模型
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-09-03 DOI: 10.1016/j.srs.2025.100278
Dong Luo , Hankui K. Zhang , Hugo De Lemos , Junjie Li , David P. Roy
This study presents and evaluates a globally applicable cloud and shadow masking model for Sentinel-2 top-of-atmosphere (TOA) reflectance using a state-of-the-art transformer-based U-Net model (Swin-Unet) trained with nearly 20 thousand globally distributed 512 × 512 20 m pixel patches to classify each pixel as cloud, cloud shadow, or clear. The training data were compiled from publicly available annotation data, that were refined for obvious annotation errors and supplemented with additional annotations to enhance representation of underrepresented cloud and surface conditions. The trained Swin-Unet model was validated using the KappaSet and CloudSEN12+ testing datasets and compared with the Fmask, Sen2Cor scene classification layer (SCL), and a deep learning model CloudS2Mask. The Swin-Unet achieved the highest overall accuracy (91.32 %) and the highest F1-scores for cloud (0.909) and clear classes (0.935), despite a lower cloud shadow F1-score (0.691) than CloudS2Mask (0.743). The four models were also applied to 11,458 Sentinel-2 images acquired over a calendar year for 78 globally distributed 109 × 109 km tiles and the temporal smoothness index (TSI) of the time series ‘clear’ surface reflectance was derived. The Swin-Unet model yielded the smallest TSI value (most temporally consistent reflectance) for each selected Sentinel-2 band. Visual assessment confirmed the superior performance of the Swin-Unet model. The results highlight the potential of the Swin-Unet model for Sentinel-2 cloud and cloud shadow detection for images acquired anywhere and anytime. The training data and model are publicly available to enable users to apply them efficiently.
本研究提出并评估了Sentinel-2大气顶(TOA)反射率的全球适用云和阴影掩蔽模型,该模型使用最先进的基于变压器的U-Net模型(swon - unet),该模型使用近2万个全球分布的512 × 512 20 m像素块进行训练,将每个像素分为云、云阴影或晴空。训练数据是从公开的标注数据中编译而来的,这些标注数据对明显的标注错误进行了细化,并补充了额外的标注,以增强对未被充分代表的云和地表条件的表示。使用KappaSet和CloudSEN12+测试数据集对训练好的swun - unet模型进行验证,并与Fmask、Sen2Cor场景分类层(SCL)和深度学习模型CloudS2Mask进行比较。swan - unet获得了最高的总体精度(91.32%),云(0.909)和清晰类(0.935)的最高f1分数,尽管云阴影f1分数(0.691)低于CloudS2Mask(0.743)。将这四种模型应用于78个全球分布的109 × 109 km瓦片的11458张Sentinel-2图像,并获得了时间序列“清晰”地表反射率的时间平滑指数(TSI)。swwin - unet模型为每个选定的Sentinel-2波段提供了最小的TSI值(最短暂一致的反射率)。视觉评价证实了swan - unet模型的优越性能。结果突出了swwin - unet模型在Sentinel-2云和云阴影检测中的潜力,可以随时随地获取图像。训练数据和模型是公开的,使用户能够有效地应用它们。
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引用次数: 0
Automatic mapping of high-resolution impervious surfaces driven by hierarchical adaptive features 基于层次自适应特征的高分辨率不透水表面自动映射
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-10-01 DOI: 10.1016/j.srs.2025.100300
Linyilin Xu, Genyun Sun, Aizhu Zhang, Zheng Han, Zheng Li, Yuanhao Zhao
The uncontrolled expansion of impervious surfaces across the Indochina Peninsula poses serious environmental and societal challenges. Accurate monitoring of their spatiotemporal dynamics is crucial for regional sustainable development. However, existing medium-to low-resolution datasets often suffer from systematic and regionally diverse rounding errors, which significantly undermine the reliability of monitoring efforts. Here, we propose a robust and computationally efficient framework built on Google Earth Engine to automate the production of large-scale, high-resolution impervious surface datasets. First, the Phenology Enhanced Vegetation Index (PEVI) is introduced to suppress noise in automated samples, enabling a de-manualized training. Then, hierarchical adaptive features are derived from multi-scale convolution and a hierarchical strategy to advance regional heterogeneous target representation, especially in complex scenarios. Accordingly, we develop ICPIS, the first-ever impervious surface dataset with a 5-m resolution for the Indochina Peninsula, spanning the period from 2016 to 2023. Accuracy assessments show its overall accuracies of 90.69 % and 91.32 % for 2016 and 2023, with Kappa coefficients of 0.813 and 0.826. In practical applications of spatial representation and temporal monitoring, ICPIS outperforms existing high-resolution and multi-temporal datasets. This study successfully reduces rounding errors in current impervious surface mapping for the Indochina Peninsula, and enables a provision of clearer data support for stakeholders.
印度支那半岛上不透水地表的不受控制的扩张带来了严重的环境和社会挑战。准确监测其时空动态对区域可持续发展至关重要。然而,现有的中低分辨率数据集经常存在系统和区域差异的舍入误差,这大大破坏了监测工作的可靠性。在此,我们提出了一个基于谷歌Earth Engine的鲁棒且计算效率高的框架,以自动生成大规模,高分辨率的不透水表面数据集。首先,引入物候增强植被指数(Phenology Enhanced Vegetation Index, PEVI)来抑制自动化样本中的噪声,实现非人工训练。然后,从多尺度卷积和分层策略中得到层次自适应特征,以推进区域异构目标表示,特别是在复杂场景下。因此,我们开发了ICPIS,这是第一个印度支那半岛5米分辨率的不透水面数据集,时间跨度为2016年至2023年。准确度评估显示,2016年和2023年的总体准确率分别为90.69%和91.32%,Kappa系数分别为0.813和0.826。在空间表示和时间监测的实际应用中,ICPIS优于现有的高分辨率和多时间数据集。该研究成功地减少了当前印度支那半岛不透水地表测绘的舍入误差,并为利益相关者提供了更清晰的数据支持。
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引用次数: 0
Hybrid unsupervised methods and inject-multiply morphological features for mapping wildfire burned areas with multi-spectral satellite data 混合无监督方法和注入-多重形态特征在多光谱卫星数据野火烧伤区制图中的应用
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-10-21 DOI: 10.1016/j.srs.2025.100305
Mohammad Esmaeili , Dariush Abbasi-Moghadam , Alireza Sharifi , Nizom Farmonov
Mapping wildfire burned areas using satellite imagery is essential for immediate response measures as well as for long-term recovery planning. These maps provide critical information to response teams, allowing them to effectively allocate resources and prioritize affected areas. This study focuses on the aim of providing accurate maps of areas affected by wildfires in the Guzli region near Bukhara province in Uzbekistan. The benchmark dataset from the study area, named UZB-WF2022, which indicates the country name and year of occurrence, and includes Sentinel-2 and Plant-Scope multispectral multi-resolution images. This study uses a mixture of unsupervised deep learning with the k-means algorithm to accurately identify and map burned areas. The core of the proposed method is an autoencoder model designed with 3-dimensional convolutional layers. This autoencoder is mixed with the k-means algorithm in the latent space of the model and uses the k-means cost function to improve the training process. In addition, the proposed method has an attention mechanism based on morphological operations called Inject-Multiply. This mechanism integrates morphological features obtained from post-wildfire vegetation index data and moisture changes captured in Sentinel-2 images, focusing on enriching features related to the shape and boundaries of burned areas. This study evaluates the effectiveness of the proposed method in labeling, identifying, and mapping burned areas using benchmark datasets, using different evaluation criteria. The model achieves an accuracy of over 93 % on the UZB-WF2022 dataset. This approach increases the accuracy of burned area detection in similar datasets and facilitates more informed decision-making for post-wildfire recovery and land management.
利用卫星图像绘制野火烧毁地区的地图,对于采取即时反应措施以及制定长期恢复规划至关重要。这些地图为反应小组提供了关键信息,使他们能够有效地分配资源并确定受影响地区的优先次序。本研究的重点是提供乌兹别克斯坦布哈拉省附近Guzli地区受野火影响地区的准确地图。来自研究区域的基准数据集名为UZB-WF2022,其中显示了国家名称和发生年份,包括Sentinel-2和Plant-Scope多光谱多分辨率图像。本研究使用无监督深度学习和k-means算法的混合来准确识别和绘制烧伤区域。该方法的核心是一个三维卷积层自编码器模型。该自编码器在模型的潜在空间中混合了k-means算法,并使用k-means代价函数来改进训练过程。此外,该方法还具有一种基于形态学操作的注意机制,称为注入-相乘。该机制整合了野火后植被指数数据和Sentinel-2图像中水分变化的形态学特征,重点丰富了与烧伤区域形状和边界相关的特征。本研究使用基准数据集,使用不同的评估标准,评估了所提出的方法在标记,识别和绘制烧伤区域方面的有效性。该模型在UZB-WF2022数据集上实现了93%以上的精度。这种方法提高了类似数据集中被烧毁区域检测的准确性,并为野火后的恢复和土地管理提供了更明智的决策。
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引用次数: 0
UAV-enabled evaluation of forestry plantations: A comprehensive assessment of laser scanning and photogrammetric approaches 林业人工林的无人机评估:激光扫描和摄影测量方法的综合评估
IF 5.7 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-06-06 DOI: 10.1016/j.srs.2025.100245
Robin J.L. Hartley , Sadeepa Jayathunga , Joane S. Elleouet , Benjamin S.C. Steer , Michael S. Watt
The use of unmanned aerial vehicles (UAVs), particularly with high-density point clouds obtained through UAV laser scanning (ULS) and UAV structure from motion (UAV-SfM) techniques, offer cost-effective alternatives for forest inventory. However, the literature lacks comprehensive assessments of their limitations across diverse ranges of age classes and site conditions. This study addressed this gap by evaluating the estimation accuracy of crucial tree attributes, diameter at breast height (DBH) and tree height, in a range of age classes within forest plantations. In addition, this study thoroughly evaluated the performance of ULS and UAV-SfM in diverse site conditions using point clouds obtained from Pinus radiata D. Don plantations, a widely planted commercial timber species worldwide. To achieve this, UAV and field data were gathered from twelve sites, including multitemporal data for four sites. By employing an automated data processing pipeline, individual trees were segmented and structural metrics extracted from tree segments to estimate DBH and tree height at an individual tree level. Results indicated that UAV-SfM and ULS performed comparably in estimating DBH over the entire dataset, with R2 values of 0.67 and 0.74 and RMSE values of 2.05 cm (11 %) and 2.13 cm (11 %) respectively. However, ULS generally outperformed UAV-SfM at the site level, achieving higher R2 values (0.46–0.90 vs 0.21–0.85) and RMSE values (0.33–7.24 cm at 7–24 % vs. 0.35–6.15 cm at 8–17 %). ULS also consistently outperformed UAV-SfM in tree height measurements across sites, with an average per site RMSE of 0.68 m (5.4 %) compared with 1.21 m (11.59 %), demonstrating its robustness in diverse conditions. Site-specific factors such as stand maturity and logging debris affected measurement reliability in both datasets, with accuracy improving for younger sites, sites with a more open canopy and more favourable site conditions (less logging debris and weed cover). The study also indicated a moderate relationship between ground sampling distance (GSD) of the imagery and UAV-SfM accuracy. The findings highlight the significance of considering site-specific variables when choosing UAV technologies for conducting forest inventory, ensuring informed decisions in UAV-based forest inventory practices. Consequently, the insights gained from this research hold significant importance for practical forestry applications.
使用无人机(UAV),特别是通过无人机激光扫描(ULS)和无人机运动结构(UAV- sfm)技术获得的高密度点云,为森林清查提供了具有成本效益的替代方案。然而,文献缺乏对其在不同年龄类别和场地条件下的局限性的全面评估。本研究通过评估人工林内不同年龄层的关键树木属性,胸径和树高的估计精度来解决这一差距。此外,本研究还利用辐射松(Pinus radiata D. Don)人工林的点云,全面评估了ULS和无人机- sfm在不同场地条件下的性能。辐射松是一种全球广泛种植的商业木材树种。为了实现这一点,从12个站点收集无人机和现场数据,包括4个站点的多时相数据。通过采用自动化数据处理管道,对单个树进行分割,并从树段中提取结构指标,以估算单个树的胸径和树高。结果表明,UAV-SfM和ULS在估算整个数据集的胸径时表现相当,R2值分别为0.67和0.74,RMSE值分别为2.05 cm(11%)和2.13 cm(11%)。然而,ULS在现场水平上通常优于UAV-SfM,获得更高的R2值(0.46-0.90 vs 0.21-0.85)和RMSE值(0.33-7.24 cm, 7 - 24% vs 0.35-6.15 cm, 8 - 17%)。ULS在不同地点的树木高度测量中也始终优于无人机- sfm,平均每个地点的RMSE为0.68米(5.4%),而平均每个地点的RMSE为1.21米(11.59%),证明了其在不同条件下的鲁棒性。立地特定因素,如林分成熟度和伐木碎屑影响了两个数据集的测量可靠性,对于较年轻的立地、树冠更开阔的立地和更有利的立地条件(较少的伐木碎屑和杂草覆盖),精度有所提高。研究还表明,图像的地面采样距离(GSD)与无人机- sfm精度之间存在中等关系。研究结果强调了在选择无人机技术进行森林清查时考虑特定地点变量的重要性,确保在基于无人机的森林清查实践中做出明智的决策。因此,从本研究中获得的见解对实际林业应用具有重要意义。
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引用次数: 0
Spatiotemporal variation and driving mechanisms of vegetation net primary productivity in Hunan Province from 2001 to 2023 2001 - 2023年湖南省植被净初级生产力时空变化及驱动机制
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-08-08 DOI: 10.1016/j.srs.2025.100269
Xiangyu Yin, Dan Cao
Understanding the spatiotemporal variation in vegetation net primary productivity (NPP) and its response to natural and anthropogenic factors is essential for advancing regional ecological conservation and restoration. Therefore, this study employed the Mann–Kendall test, Sen's slope estimator, and partial correlation analysis to identify the trends and relationships between NPP and climatic factors across Hunan Province, China. Additionally, Random Forest and Geodetector models were used to evaluate the explanatory power of natural and anthropogenic factors on NPP. The following results were obtained: (1) During the study period from 2001 to 2023, the average annual NPP showed an increasing trend, with a growth rate of 2.66 gC/m2/a; (2) in high-altitude areas and the Dongting Lake Plain, average NPP was lower during 2019–2023 than that during 2001–2005, but higher in other regions. (3) in Hunan Province, NPP was more sensitive to temperature than to precipitation. Considering the lag effect of climatic factors, the temperature from the previous year showed a significant positive impact on NPP; (4) elevation had the strongest explanatory power for NPP and exhibited notable bivariate enhancement when interacting with other factors. Thus, our study provides a systematic analysis of the temporal and spatial variations in NPP, offering a scientific basis for the sustainable management of regional ecosystems.
了解植被净初级生产力(NPP)的时空变化及其对自然和人为因素的响应,对于推进区域生态保护与恢复具有重要意义。为此,本研究采用Mann-Kendall检验、Sen’s斜率估计和偏相关分析等方法对湖南省NPP与气候因子的变化趋势和关系进行了分析。此外,利用随机森林模型和地理探测器模型评价自然因子和人为因子对NPP的解释能力。结果表明:①2001 ~ 2023年,年平均NPP呈增加趋势,年均增长率为2.66 gC/m2/a;(2) 2019-2023年,高海拔地区和洞庭湖平原的平均NPP低于2001-2005年,而其他地区则高于2001-2005年。(3)湖南省NPP对温度的敏感性大于对降水的敏感性。考虑气候因子的滞后效应,前一年的气温对NPP有显著的正向影响;(4)海拔高度对NPP的解释力最强,与其他因子的交互作用表现出显著的双变量增强。因此,本研究对NPP的时空变化进行了系统分析,为区域生态系统的可持续管理提供了科学依据。
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引用次数: 0
Monitoring cropland cultivation, abandonment, fallowing and recultivation dynamics with regard to conflict intensity in war-affected Ukraine 监测受战争影响的乌克兰境内与冲突强度相关的耕地种植、撂荒、休耕地和复垦动态
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-11-04 DOI: 10.1016/j.srs.2025.100326
Josef Wagner , Shabarinath S. Nair , Sergii Skakun , Erik C. Duncan , Fangjie Li , Oleksandra Oliinyk , Françoise Nerry , Jean Rehbinder , Inbal Becker-Reshef
Three years of sustained shelling, mining, and active combat have caused major cropland abandonment in Ukraine, particularly along frontlines. Existing estimates of abandoned areas vary up to fourfold, due to inconsistent definitions, baselines and biased estimators of area. Many studies classify fallow land – temporarily unused but managed – as abandoned. In contrast, abandoned lands (neither cultivated nor managed) are often contaminated by unexploded ordnance, mines, or chemicals, requiring clearance before recultivation. Disentangling fallow from abandoned cropland is therefore crucial for post-war recovery planning and for determining tax relief for farmers unable to access their fields. We applied a two-level stratified random sampling design and unbiased estimators of area to quantify the extent of cultivated, fallow, and abandoned cropland. Four regions with distinct conflict dynamics were delineated using the Armed Conflict Location and Event Dataset, and within each region stratified random samples were drawn from a Planet-based cultivation status map. Between 2021 and 2024, full Ukraine's cultivated area declined by 2.5 Mha (−8.5 %). By 2024, 7 % of cropland (2.213 ± 0.256 Mha) was abandoned, of which 1.121 ± 0.148 Mha to 1.671 ± 0.169 Mha may be permanently lost to cultivation, primarily along frontlines. Fallow areas increased nationally, especially in territories reclaimed from occupation. In 2024 alone, up to 0.472 ± 0.143 Mha were recultivated, by far exceeding official land clearance figures and suggesting widespread reliance on informal or self-organized demining. These results establish a replicable framework for monitoring land-use dynamics in conflict zones, supporting evidence-based recovery, landmine clearance prioritization, and agricultural policy planning in post-war Ukraine.
三年的持续炮击、地雷和积极的战斗导致乌克兰大片农田被遗弃,特别是在前线。由于不一致的定义、基线和有偏差的面积估计,对废弃地区的现有估计相差高达四倍。许多研究将休耕土地——暂时未使用但得到管理的土地——归类为废弃土地。相比之下,被遗弃的土地(既没有耕种也没有管理)往往受到未爆弹药、地雷或化学品的污染,需要在重新耕种之前进行清理。因此,将休耕区从废弃农田中分离出来,对于战后恢复计划和确定无法进入农田的农民的税收减免至关重要。我们采用两水平分层随机抽样设计和无偏面积估计来量化耕地、休耕耕地和废弃耕地的范围。利用“武装冲突地点和事件数据集”(Armed conflict Location and Event Dataset)圈定了4个具有不同冲突动态的区域,并在每个区域内从基于行星的种植状态图中抽取分层随机样本。在2021年至2024年期间,乌克兰的耕地面积减少了2.5亿公顷(- 8.5%)。到2024年,将有7%的耕地(2.213±0.256 Mha)被撂荒,其中1.121±0.148 ~ 1.671±0.169 Mha可能永久退耕,主要集中在前线。休耕面积在全国范围内增加,特别是在收复的领土上。仅在2024年,就重新开垦了多达0.472±0.143公顷的土地,远远超过了官方的土地清理数据,表明广泛依赖非正式或自组织排雷。这些结果建立了一个可复制的框架,用于监测冲突地区的土地使用动态,支持战后乌克兰的循证恢复、排雷优先次序和农业政策规划。
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引用次数: 0
Rapid domain adaptation for disaster impact assessment: Remote sensing of building damage after the 2021 Germany floods 灾害影响评估的快速域适应:2021年德国洪水后建筑损坏的遥感
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-09-26 DOI: 10.1016/j.srs.2025.100287
Victor Hertel , Christian Geiß , Marc Wieland , Hannes Taubenböck
The extent of building damage is a crucial indicator for guiding post-disaster relief strategies and rescue operations. However, diverse built environments and variations in imaging setups pose significant challenges for rapid, automated damage assessment from remote sensing data, leading to strong domain shifts and significantly reduced performance of pre-trained models. To align advanced domain adaptation techniques with the practical constraints of rapid mapping, we evaluate and propose techniques that effectively balance accuracy, resource efficiency, and operational applicability. By employing a Siamese multitask fusion network for semantic segmentation and change detection, we introduce a novel experimental approach that quantifies the influence of a priori information on domain adaptation performance. All strategies are benchmarked on a fully labeled dataset from the 2021 Germany floods. Our evaluation includes class-specific accuracy improvements, model tendencies toward over- or underestimation of damage, and resource requirements in terms of processing time, human capacity, and computational demands. Scenario-based recommendations are provided to assist in selecting the most suitable method for given conditions. All adopted techniques significantly improved model performance in a short time, achieving up to 86 % of the potential performance gain compared to supervised learning. Supervised domain adaptation with minimal annotations per class emerged as the most effective method for immediate action. Semi-supervised domain adaptation, coupled with an automatic labeling strategy based on hazard intensity, provided the highest performance improvements while maintaining low demands on time and human resources. Purely semi-supervised domain adaptation turned out time-consuming and computationally expensive, therefore advisable only under specific conditions with sufficient time or in the absence of human capacity.
建筑物受损程度是指导灾后救援策略和救援行动的重要指标。然而,不同的建筑环境和成像设置的变化对遥感数据的快速、自动损伤评估构成了重大挑战,导致强烈的领域转移和预训练模型的性能显著降低。为了将先进的领域自适应技术与快速制图的实际约束结合起来,我们评估并提出了有效平衡准确性、资源效率和操作适用性的技术。通过使用Siamese多任务融合网络进行语义分割和变化检测,我们引入了一种新的实验方法来量化先验信息对领域自适应性能的影响。所有策略都以2021年德国洪水的完全标记数据集为基准。我们的评估包括特定类别的准确性改进、模型对损害高估或低估的倾向,以及处理时间、人力和计算需求方面的资源需求。提供基于场景的建议,以帮助在给定条件下选择最合适的方法。所有采用的技术都在短时间内显著提高了模型性能,与监督学习相比,实现了高达86%的潜在性能增益。对每个类进行最小注释的有监督的领域自适应成为立即采取行动的最有效方法。半监督域自适应,加上基于危险强度的自动标记策略,提供了最大的性能改进,同时保持了对时间和人力资源的低要求。纯半监督域自适应耗时长,计算量大,因此只有在时间充足或人力不足的特定条件下才可取。
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引用次数: 0
Drone-borne ground-penetrating radar reveals spatiotemporal moisture dynamics in peatland root zones 无人机探地雷达揭示泥炭地根区水分时空动态
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-10-10 DOI: 10.1016/j.srs.2025.100311
Maud Henrion , Yanfei Li , Kaijun Wu , François Jonard , Sophie Opfergelt , Veerle Vanacker , Kristof Van Oost , Sébastien Lambot
Peatlands are important ecosystems, providing essential ecological services, such as carbon storage and biodiversity support. However, they are endangered by degradation due to land use and climate change. Their moisture status is a key factor, as it substantially impacts carbon storage and decomposition. Therefore, it is essential to accurately characterize, map, and monitor peatland moisture. This study assessed the potential of drone-borne Ground-penetrating radar (GPR), combined with full-wave inversion, to study peatland moisture. We applied this technique to a peatland in the Belgian Hautes Fagnes previously degraded by reforestation. We conducted GPR measurements over 4.5 ha for one and a half years, producing 19 different peatland root-zone moisture maps at a 5 m resolution. Our results demonstrate that this method can track moisture changes over the study site, with an overall temporal correlation of 0.71 with ground-based moisture sensors, but is less reliable in nearly saturated areas. The spatial correlation with ground-based probes is lower (0.23), due to the high micro-variability of moisture and the use of kriging interpolation to generate maps, resulting in a spatial mismatch as GPR measurements were not collected directly above the probes. We applied statistical clustering techniques on the moisture maps to delineate homogeneous moisture classes that align well with other specific site characteristics (peat depth, vegetation types, Normalized Difference Water Index and surface temperature). This technique shows potential for planning and monitoring peatland restoration efforts and provides a new and valuable approach for peatland moisture studies to complement existing satellite- and other drone-based methods.
泥炭地是重要的生态系统,提供重要的生态服务,如碳储存和生物多样性支持。然而,由于土地利用和气候变化,它们受到退化的威胁。它们的水分状况是一个关键因素,因为它实质上影响碳的储存和分解。因此,准确地描述、绘制和监测泥炭地的湿度是至关重要的。本研究评估了无人机探地雷达(GPR)结合全波反演研究泥炭地湿度的潜力。我们将这项技术应用于比利时上法格内的一块泥炭地,这块泥炭地之前因重新造林而退化。我们在一年半的时间里对4.5公顷的泥炭地进行了探地雷达测量,以5米的分辨率绘制了19幅不同的泥炭地根区湿度图。结果表明,该方法可以跟踪研究地点的湿度变化,与地面湿度传感器的总体时间相关性为0.71,但在接近饱和的地区可靠性较差。与地面探测器的空间相关性较低(0.23),这是由于湿度的高微变异性和使用克里格插值生成地图,导致空间不匹配,因为探地雷达测量不是直接在探测器上方收集的。我们在湿度图上应用统计聚类技术来描绘均匀的湿度等级,这些等级与其他特定的站点特征(泥炭深度、植被类型、归一化差水指数和地表温度)很好地一致。该技术显示了规划和监测泥炭地恢复工作的潜力,并为泥炭地湿度研究提供了一种新的有价值的方法,以补充现有的卫星和其他基于无人机的方法。
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引用次数: 0
Debris covered glacier mapping using newly annotated multisource remote sensing data and geo-foundational model 基于新标注多源遥感数据和地理基础模型的碎屑覆盖冰川制图
IF 5.2 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-10-30 DOI: 10.1016/j.srs.2025.100319
Saurabh Kaushik , Lalit Maurya , Elizabeth Tellman , Guoqing Zhang , Jaydeo K. Dharpure
The automated mapping of debris covered glaciers remains challenging due to spectral similarity between supraglacial debris (on-glaciers) and periglacial debris (off-glaciers). Deep learning offers promising capabilities, yet the lack of high-quality publicly available datasets and limited exploration of optimal model architecture constrain progress in this domain. To address this, we introduce the Global Supraglacial Debris Cover Dataset (GSDD), consisting of 1876 images (∼49,000.00 km2) collected globally from diverse glacierized regions, including High Mountain Asia, Andes, Western Canada, Alaska, and Swiss Alps, to incorporate the heterogeneity of glacial features and environments. This multisource remote sensing dataset includes 10 spectral bands—Blue, Green, Red, Near-Infrared, Shortwave Infrared (SWIR1 & SWIR2), Normalized Difference Rock Index (NDRI), Slope, Elevation, and Velocity—providing critical information to distinguish glacier debris. To evaluate the efficacy of deep learning models for mapping glacier debris, we compare Prithvi Geo-Foundational Model (GFM) combined with multiple decoders, CNN-based models (UNet, Attention U-Net, and DeepLabv3+), a Vision Transformer-based model (TransNorm), and variant of the Prithvi GFM (i.e., UViT). Our results show Prithvi GFM with UperNet decoder outperformed all, achieving mIoU = 0.80 and F1-score = 0.91, surpassing DeepLabv3+ (0.71 mIoU), Attention U-Net (0.73), U-Net (0.72), TransNorm (0.71), and UViT (0.70). Our results demonstrate significant methodological advances in accurately mapping glacier termini, along with the identification of glacier snouts. Feature analysis identified the optimal band combination (B-G-NIR-SWIR-Slope-Elevation) for debris mapping. The GSDD dataset enables direct comparison, development, and evaluation of deep learning models, supporting advancement in fast and reliable automated glacier mapping.
由于冰川上碎屑(冰川上)和冰周碎屑(冰川外)的光谱相似性,冰川覆盖碎屑的自动测绘仍然具有挑战性。深度学习提供了有前途的能力,但缺乏高质量的公开可用数据集和对最佳模型架构的有限探索限制了该领域的进展。为了解决这个问题,我们引入了全球冰川上碎屑覆盖数据集(GSDD),该数据集包括从全球不同的冰川化地区收集的1876张图像(~ 49,000.00 km2),包括亚洲高山、安第斯山脉、加拿大西部、阿拉斯加和瑞士阿尔卑斯山,以纳入冰川特征和环境的异质性。这个多源遥感数据集包括10个光谱波段——蓝色、绿色、红色、近红外、短波红外(SWIR1 & SWIR2)、归一化岩石指数(NDRI)、坡度、高程和速度——为区分冰川碎片提供了关键信息。为了评估深度学习模型在冰川碎片映射中的有效性,我们比较了Prithvi地理基础模型(GFM)与多个解码器、基于cnn的模型(UNet、Attention U-Net和DeepLabv3+)、基于视觉转换器的模型(TransNorm)和Prithvi地理基础模型的变型(即UViT)。我们的研究结果表明,Prithvi GFM与UperNet解码器的性能优于所有解码器,mIoU = 0.80, F1-score = 0.91,超过DeepLabv3+ (0.71 mIoU), Attention U-Net (0.73), U-Net (0.72), TransNorm(0.71)和UViT(0.70)。我们的研究结果表明,在准确绘制冰川末端以及识别冰川口部方面,方法上取得了重大进展。特征分析确定了最佳波段组合(B-G-NIR-SWIR-Slope-Elevation)。GSDD数据集可以直接比较、开发和评估深度学习模型,支持快速、可靠的自动冰川制图。
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引用次数: 0
Landsat Next current design for geological remote sensing: VNIR-SWIR-TIR data continuity and new opportunities 地质遥感的下一个当前设计:vnir - swr - tir数据连续性和新的机会
IF 5.7 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-12-01 Epub Date: 2025-07-17 DOI: 10.1016/j.srs.2025.100258
Bruno Portela, Harald van der Werff, Christoph Hecker, Mark van der Meijde
Landsat Next, the proposed mission in NASA's Landsat program planned for 2031, is designed to extend the legacy of Landsat 8–9 and Sentinel-2 in the visible-near and shortwave infrared and to introduce operational thermal infrared capabilities comparable to ASTER. As the first multispectral spaceborne sensor to combine visible-near, shortwave, and thermal infrared coverage since ASTER, it presents a unique opportunity to reestablish long-term geological remote sensing continuity.
In this study, we assess whether Landsat Next, in its currently published design, can replicate or even improve geological information derived from Sentinel-2 and ASTER. We simulate Landsat Next imagery using airborne hyperspectral datasets acquired over two well-characterised mineral systems in the Yerington district, Nevada (USA), generating equivalent datasets for Sentinel-2 and ASTER to enable sensor-level comparison without environmental influences. By adapting established band ratios and applying spectral-only and spectral-spatial resampling when simulating Landsat Next data, we isolate the influence of Landsat Next's band configuration and resolution.
Our results confirm that Landsat Next replicates key mineralogical patterns observed in Sentinel-2 and ASTER products. Moreover, it enables enhanced discrimination in zones of spectrally overlapping alteration, especially where its higher spectral or spatial resolution improves mineral identification.
By replicating established band ratio products while enhancing the detection of key mineralogical features, Landsat Next represents the first spaceborne sensor since ASTER that can potentially deliver continuous multispectral information across the visible-near, shortwave, and thermal infrared ranges, supporting future geological remote sensing studies.
Landsat Next计划于2031年完成,旨在扩展Landsat 8-9和Sentinel-2在可见近红外和短波红外方面的传统,并引入可与ASTER相媲美的操作热红外能力。作为自ASTER以来首个结合近可见光、短波和热红外覆盖的多光谱星载传感器,它为重建长期地质遥感连续性提供了独特的机会。在这项研究中,我们评估了Landsat Next在其目前公布的设计中是否可以复制甚至改进Sentinel-2和ASTER获得的地质信息。我们使用在美国内华达州耶灵顿地区两个特征良好的矿物系统上获取的机载高光谱数据集模拟Landsat Next图像,为Sentinel-2和ASTER生成等效数据集,以便在不受环境影响的情况下进行传感器级比较。在模拟Landsat Next数据时,通过调整已建立的频带比并应用频谱和频谱空间重采样,我们隔离了Landsat Next波段配置和分辨率的影响。我们的研究结果证实,Landsat Next复制了Sentinel-2和ASTER产品中观察到的关键矿物学模式。此外,它可以增强光谱重叠蚀变带的识别,特别是在其更高的光谱或空间分辨率提高矿物识别的情况下。通过复制已建立的波段比产品,同时增强对关键矿物学特征的检测,Landsat Next代表了自ASTER以来的第一个星载传感器,可以在可见-近、短波和热红外范围内提供连续的多光谱信息,支持未来的地质遥感研究。
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引用次数: 0
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Science of Remote Sensing
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