Aeolian Research最新文献_第6页

Influences of soil moisture and vegetation cover on dust emission using satellite observations 基于卫星观测的土壤湿度和植被覆盖对沙尘排放的影响

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-03-01 Epub Date: 2025-02-10 DOI: 10.1016/j.aeolia.2025.100961

Faisal AlNasser , Abdelghani Chehbouni , Dara Entekhabi

This study presents an observational analysis of dust emission co-factors to high winds using remote sensing data across the North Africa and Western Asia dust belt. Co-factors are parameterized in climate and weather models. Observational evidence of their role and functional dependencies advance our capability to model and predict the important role of dust in radiative processes, far-field ecological nutrient transfers, and human health impacts. We use multiple years of high-temporal resolution (hourly) dust plume data, which enables analyses of emission sources, and plume extents. It also allows us to co-locate environmental factors such as wind speed, soil moisture, and vegetation and synchronize them with the time and location of major dust emission events. We focus on the combined effect of these factors in determining the frequency and intensity of dust storms, as well as identifying wind speed thresholds for dust emission at source areas. Key findings reveal wind speed thresholds twice as high as those reported in previous studies. We focus on two case studies to demonstrate the prominence of the co-factors. The case study of the Syrian Desert during the summer of 2022 illustrates the impact of dry soil, strong winds, and declining vegetation cover on the formation of severe dust storms. Additionally, the case study of the Bodélé Depression demonstrates the influence of reduced wind speed on emission frequency. The findings offer insights into how environmental conditions influence dust emission dynamics, establishing the basis for the development of more accurate dust emission models.

本文利用北非和西亚沙尘带的遥感数据，对大风的沙尘排放辅助因子进行了观测分析。辅助因子在气候和天气模式中被参数化。它们的作用和功能依赖的观测证据提高了我们模拟和预测尘埃在辐射过程、远场生态营养转移和人类健康影响中的重要作用的能力。我们使用多年的高时间分辨率（每小时）尘羽数据，这使得分析排放源和尘羽范围成为可能。它还允许我们共同定位环境因素，如风速、土壤湿度和植被，并将它们与主要粉尘排放事件的时间和地点同步。我们重点研究这些因素的综合作用，以确定沙尘暴的频率和强度，以及确定风源地区的粉尘排放风速阈值。主要研究结果显示，风速阈值是以前研究报告的两倍。我们将重点放在两个案例研究上，以证明辅助因素的重要性。对2022年夏季叙利亚沙漠的案例研究说明了土壤干燥、强风和植被覆盖减少对严重沙尘暴形成的影响。此外，以bodsamuise洼地为例分析了风速降低对发射频率的影响。这些发现为了解环境条件如何影响粉尘排放动力学提供了见解，为开发更准确的粉尘排放模型奠定了基础。

{"title":"Influences of soil moisture and vegetation cover on dust emission using satellite observations","authors":"Faisal AlNasser , Abdelghani Chehbouni , Dara Entekhabi","doi":"10.1016/j.aeolia.2025.100961","DOIUrl":"10.1016/j.aeolia.2025.100961","url":null,"abstract":"<div><div>This study presents an observational analysis of dust emission co-factors to high winds using remote sensing data across the North Africa and Western Asia dust belt. Co-factors are parameterized in climate and weather models. Observational evidence of their role and functional dependencies advance our capability to model and predict the important role of dust in radiative processes, far-field ecological nutrient transfers, and human health impacts. We use multiple years of high-temporal resolution (hourly) dust plume data, which enables analyses of emission sources, and plume extents. It also allows us to co-locate environmental factors such as wind speed, soil moisture, and vegetation and synchronize them with the time and location of major dust emission events. We focus on the combined effect of these factors in determining the frequency and intensity of dust storms, as well as identifying wind speed thresholds for dust emission at source areas. Key findings reveal wind speed thresholds twice as high as those reported in previous studies. We focus on two case studies to demonstrate the prominence of the co-factors. The case study of the Syrian Desert during the summer of 2022 illustrates the impact of dry soil, strong winds, and declining vegetation cover on the formation of severe dust storms. Additionally, the case study of the Bodélé Depression demonstrates the influence of reduced wind speed on emission frequency. The findings offer insights into how environmental conditions influence dust emission dynamics, establishing the basis for the development of more accurate dust emission models.</div></div>","PeriodicalId":49246,"journal":{"name":"Aeolian Research","volume":"72 ","pages":"Article 100961"},"PeriodicalIF":3.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aeolian influences on gully erosion in clay-rich soils in a humid subtropical climate, Southeast USA 美国东南部湿润亚热带气候中富含粘土的土壤中风沙对沟壑侵蚀的影响

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-03-01 Epub Date: 2025-01-09 DOI: 10.1016/j.aeolia.2024.100959

Robert McSweeney, Ingrid Luffman, Arpita Nandi

This study evaluates aeolian processes as significant but overlooked factors in runoff-driven gully erosion in humid subtropical climates. A network of 105 erosion pins installed in gully channels, interfluves, and sidewalls on an eroding hillslope in southern Appalachia was monitored weekly (2012–2018); concurrently, meteorological data were collected on site every 5 min. Wind variables were aggregated to weekly periods and statistical analyses (correlation, autocorrelation, Ordinary Least Squares (OLS) regression) were performed to (i) determine impacts of wind and wind-driven rain on gully erosion, (ii) assess seasonal gully erosion patterns relative to wind and wind-driven rain, and (iii) evaluate slope aspect effects on erosion of gully sidewalls. Annual OLS regression models for gully erosion using wind variables had low explanatory power (adjusted R² = 0.067 (channels) to 0.197 (sidewalls)). The greatest gully erosion activity occurred in winter and spring aligning with periods of highest wind speeds; seasonal erosion and wind patterns were confirmed with autocorrelation. Seasonal OLS regression models had higher explanatory power (adjusted R² = 0.044 to 0.367), with strongest models in autumn, suggesting seasonal importance of wind-related drivers for gully erosion. Southwesterly prevailing wind direction was normal to the gully axis, suggesting influence of slope aspect; higher erosion rates were recorded in the windward sidewalls but differences were statistically insignificant. Though rainfall and freeze–thaw activity are primary drivers of gully erosion in southern Appalachia, this analysis confirms that seasonal aeolian processes are significant contributors. These results may be used to improve standard predictive models of gully erosion in humid subtropical climates.

该研究评估了风成过程是湿润亚热带气候中径流驱动的沟道侵蚀的重要但被忽视的因素。在阿巴拉契亚南部一个受侵蚀的山坡上，每周监测105个侵蚀销钉网络，这些销钉安装在沟道、沟道和侧壁上（2012-2018）；同时，每5分钟收集一次现场气象数据。将风变量汇总到每周周期，并进行统计分析（相关、自相关、普通最小二乘（OLS）回归），以确定风和风雨对沟槽侵蚀的影响，（ii）评估相对于风和风雨的季节性沟槽侵蚀模式，（iii）评估坡向对沟槽侧壁侵蚀的影响。使用风变量的沟道侵蚀年度OLS回归模型解释力较低（调整后的R2 = 0.067（通道）至0.197（侧壁））。冬季和春季沟蚀活动最大，与风速最高的时期一致；季节侵蚀和风型具有自相关关系。季节性OLS回归模型具有较高的解释能力（调整后的R2 = 0.044 ~ 0.367），其中秋季模型的解释能力最强，说明风相关驱动因素对沟壑区侵蚀的季节性重要性。西南盛行风向与沟轴正相关，受坡向影响；在迎风侧壁处记录到较高的侵蚀速率，但差异在统计上不显著。虽然降雨和冻融活动是阿巴拉契亚南部沟沟侵蚀的主要驱动因素，但这一分析证实，季节性风成过程是重要的贡献者。这些结果可用于改进湿润亚热带气候下沟壑侵蚀的标准预测模型。

{"title":"Aeolian influences on gully erosion in clay-rich soils in a humid subtropical climate, Southeast USA","authors":"Robert McSweeney, Ingrid Luffman, Arpita Nandi","doi":"10.1016/j.aeolia.2024.100959","DOIUrl":"10.1016/j.aeolia.2024.100959","url":null,"abstract":"<div><div>This study evaluates aeolian processes as significant but overlooked factors in runoff-driven gully erosion in humid subtropical climates. A network of 105 erosion pins installed in gully channels, interfluves, and sidewalls on an eroding hillslope in southern Appalachia was monitored weekly (2012–2018); concurrently, meteorological data were collected on site every 5 min. Wind variables were aggregated to weekly periods and statistical analyses (correlation, autocorrelation, Ordinary Least Squares (OLS) regression) were performed to (i) determine impacts of wind and wind-driven rain on gully erosion, (ii) assess seasonal gully erosion patterns relative to wind and wind-driven rain, and (iii) evaluate slope aspect effects on erosion of gully sidewalls. Annual OLS regression models for gully erosion using wind variables had low explanatory power (adjusted R<sup>2</sup> = 0.067 (channels) to 0.197 (sidewalls)). The greatest gully erosion activity occurred in winter and spring aligning with periods of highest wind speeds; seasonal erosion and wind patterns were confirmed with autocorrelation. Seasonal OLS regression models had higher explanatory power (adjusted R<sup>2</sup> = 0.044 to 0.367), with strongest models in autumn, suggesting seasonal importance of wind-related drivers for gully erosion. Southwesterly prevailing wind direction was normal to the gully axis, suggesting influence of slope aspect; higher erosion rates were recorded in the windward sidewalls but differences were statistically insignificant. Though rainfall and freeze–thaw activity are primary drivers of gully erosion in southern Appalachia, this analysis confirms that seasonal aeolian processes are significant contributors. These results may be used to improve standard predictive models of gully erosion in humid subtropical climates.</div></div>","PeriodicalId":49246,"journal":{"name":"Aeolian Research","volume":"72 ","pages":"Article 100959"},"PeriodicalIF":3.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dust transport pathways from The Great Basin 来自大盆地的尘埃运输路径

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-03-01 Epub Date: 2024-12-21 DOI: 10.1016/j.aeolia.2024.100958

Ronald S. Treminio , Nicholas P. Webb , Saroj Dhital , Akasha Faist , Beth Newingham , Colby Brungard , David DuBois , Brandon L. Edwards , Emily Kachergis

The Great Basin is at risk of increased wind erosion and dust emissions due to grazing pressure, urbanization, wildfire, and non-native plant invasion. Recent efforts to quantify wind erosion risk on Great Basin rangelands identified high to extreme wind erosion and dust emission hotspots. However, the spatial extent and seasonal variability of dust transport pathways from the Great Basin, and thus the local and regional dust impacts, are not well understood. Here, we computed forward air-parcel trajectories using the Hybrid Single-Particle Lagrangian Integrated Trajectory model using the North American Regional Reanalysis 32-km meteorological data and kernel density analysis to describe potential seasonal dust transport pathways associated with three Great Basin wind erosion hotspots. Probability mass-densities for six different heights above ground level (AGL) were estimated to describe the spatial and vertical extent of potential dust transport across North America. A large proportion of trajectories occurred within 0 – 500 m AGL in spring (25.9 % − 32.7 %), fall (33.6 % − 35.1 %), and winter (44.1 % − 53.8 %). The proportion of trajectories at 2000 – 5000 m AGL is highest in summer (32.1 % − 39.8 %) and spring (23.0 % − 23.3 %). Thus, long range west-to-east transport of dust over North America is likeliest in summer. However, local redistribution of dust near hotspots, is more likely in spring, fall, and winter. This study helps to link potential dust transport pathways to wind erosion hotspots for mitigating the local and regional impacts of dust emissions, informing rangeland management strategies, and improving air quality assessments across North America.

由于放牧压力、城市化、野火和非本地植物入侵，大盆地面临着风蚀和粉尘排放增加的风险。最近对大盆地牧场的风蚀风险进行量化的工作确定了风蚀和沙尘排放的高危和极端热点地区。然而，人们对来自大盆地的沙尘传输路径的空间范围和季节性变化，以及对当地和区域沙尘的影响还不甚了解。在此，我们使用混合单粒子拉格朗日综合轨迹模型，利用北美区域再分析 32 公里气象数据和核密度分析，计算了前向空气包裹轨迹，以描述与大盆地三个风蚀热点相关的潜在季节性沙尘传输路径。估算了离地面（AGL）六种不同高度的概率质量密度，以描述北美潜在沙尘传输的空间和垂直范围。在春季（25.9% - 32.7%）、秋季（33.6% - 35.1%）和冬季（44.1% - 53.8%），大部分轨迹发生在 0 - 500 m AGL 范围内。在 2000 - 5000 米 AGL 高度的飞行轨迹比例在夏季（32.1 % - 39.8 %）和春季（23.0 % - 23.3 %）最高。因此，北美上空由西向东的尘埃长程飘移最可能发生在夏季。不过，在春季、秋季和冬季，热点地区附近的沙尘更有可能发生局部再分布。这项研究有助于将潜在的沙尘传输路径与风蚀热点联系起来，以减轻沙尘排放对当地和区域的影响，为牧场管理战略提供信息，并改善整个北美地区的空气质量评估。

{"title":"Dust transport pathways from The Great Basin","authors":"Ronald S. Treminio , Nicholas P. Webb , Saroj Dhital , Akasha Faist , Beth Newingham , Colby Brungard , David DuBois , Brandon L. Edwards , Emily Kachergis","doi":"10.1016/j.aeolia.2024.100958","DOIUrl":"10.1016/j.aeolia.2024.100958","url":null,"abstract":"<div><div>The Great Basin is at risk of increased wind erosion and dust emissions due to grazing pressure, urbanization, wildfire, and non-native plant invasion. Recent efforts to quantify wind erosion risk on Great Basin rangelands identified high to extreme wind erosion and dust emission hotspots. However, the spatial extent and seasonal variability of dust transport pathways from the Great Basin, and thus the local and regional dust impacts, are not well understood. Here, we computed forward air-parcel trajectories using the Hybrid Single-Particle Lagrangian Integrated Trajectory model using the North American Regional Reanalysis 32-km meteorological data and kernel density analysis to describe potential seasonal dust transport pathways associated with three Great Basin wind erosion hotspots. Probability mass-densities for six different heights above ground level (AGL) were estimated to describe the spatial and vertical extent of potential dust transport across North America. A large proportion of trajectories occurred within 0 – 500 m AGL in spring (25.9 % − 32.7 %), fall (33.6 % − 35.1 %), and winter (44.1 % − 53.8 %). The proportion of trajectories at 2000 – 5000 m AGL is highest in summer (32.1 % − 39.8 %) and spring (23.0 % − 23.3 %). Thus, long range west-to-east transport of dust over North America is likeliest in summer. However, local redistribution of dust near hotspots, is more likely in spring, fall, and winter. This study helps to link potential dust transport pathways to wind erosion hotspots for mitigating the local and regional impacts of dust emissions, informing rangeland management strategies, and improving air quality assessments across North America.</div></div>","PeriodicalId":49246,"journal":{"name":"Aeolian Research","volume":"72 ","pages":"Article 100958"},"PeriodicalIF":3.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lagging behind: Impact of non-native gravel within a coastal dune system 落后：海岸沙丘系统中非原生砾石的影响

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-03-01 Epub Date: 2024-12-19 DOI: 10.1016/j.aeolia.2024.100957

Phillip P. Schmutz , Tynon Briggs , Samantha Seals

Recent research has increasingly focused on the intricate relationship between wind dynamics and sediment transport in coastal settings, particularly how surface features affect aeolian transport processes. Non-erodible roughness elements such as gravel or shell deposits play a significant role by altering wind flow and raising the wind velocity threshold required to mobilize sediment. Despite advancements in modeling, fully understanding sediment transport dynamics remains challenging due to the complex interactions between surface features and wind dynamics. This study explores the influence of non-erodible lag surfaces on sediment transport in sandy barrier island environments. Fieldwork on Santa Rosa Island, Florida, involved two plots: one with a natural sandy surface and another with a gravel lag surface. Wind and sediment transport were monitored for three months using cup anemometers and Wenglor particle counters. Spline regression models identified a two-knot system at wind speed thresholds of 9 ms⁻¹ and 11 ms⁻¹, representing critical changes in sediment transport dynamics. Our results show that non-erodible surfaces significantly reduce sediment transport at lower wind speeds. At wind speeds below 9 ms⁻¹, sediment transport on the lag surface was 131 percent lower than on the non-lag surface. However, as wind speeds increased, the influence of the lag surface diminished, and no significant difference in transport was observed at wind speeds above 11 ms⁻¹. These findings emphasize the intricate role of non-erodible elements in reducing sediment transport at lower wind speeds while enhancing transport dynamics under stronger wind conditions. These insights inform future models and guide coastal management practices.

最近的研究越来越多地集中在沿海环境中风动力和沉积物输运之间的复杂关系，特别是地表特征如何影响风成过程。不可侵蚀的粗糙元素，如砾石或贝壳沉积物，通过改变风向和提高调动沉积物所需的风速阈值发挥重要作用。尽管在建模方面取得了进步，但由于地表特征和风动力之间复杂的相互作用，完全理解沉积物的输运动力学仍然具有挑战性。本研究探讨了沙障岛环境中不可侵蚀滞后面对泥沙输运的影响。在佛罗里达州圣罗莎岛的实地考察涉及两个地块：一个是天然沙质表面，另一个是砾石滞后表面。利用杯状风速计和Wenglor粒子计数器对风和泥沙输运进行了三个月的监测。样条回归模型确定了风速阈值为9 ms−1和11 ms−1时的双结系统，代表了泥沙输运动力学的关键变化。我们的研究结果表明，在较低风速下，不可侵蚀表面显著减少了沉积物的输运。风速低于9 ms−1时，滞后面输沙量比非滞后面低131%。然而，随着风速的增加，滞后面的影响减弱，在11 ms−1以上的风速下，输运没有显著差异。这些发现强调了非可蚀性元素在低风速下减少沉积物输运而在强风条件下增强输运动力学中的复杂作用。这些见解为未来的模式提供了信息，并指导了沿海管理实践。

{"title":"Lagging behind: Impact of non-native gravel within a coastal dune system","authors":"Phillip P. Schmutz , Tynon Briggs , Samantha Seals","doi":"10.1016/j.aeolia.2024.100957","DOIUrl":"10.1016/j.aeolia.2024.100957","url":null,"abstract":"<div><div>Recent research has increasingly focused on the intricate relationship between wind dynamics and sediment transport in coastal settings, particularly how surface features affect aeolian transport processes. Non-erodible roughness elements such as gravel or shell deposits play a significant role by altering wind flow and raising the wind velocity threshold required to mobilize sediment. Despite advancements in modeling, fully understanding sediment transport dynamics remains challenging due to the complex interactions between surface features and wind dynamics. This study explores the influence of non-erodible lag surfaces on sediment transport in sandy barrier island environments. Fieldwork on Santa Rosa Island, Florida, involved two plots: one with a natural sandy surface and another with a gravel lag surface. Wind and sediment transport were monitored for three months using cup anemometers and Wenglor particle counters. Spline regression models identified a two-knot system at wind speed thresholds of 9 ms<sup>−1</sup> and 11 ms<sup>−1</sup>, representing critical changes in sediment transport dynamics. Our results show that non-erodible surfaces significantly reduce sediment transport at lower wind speeds. At wind speeds below 9 ms<sup>−1</sup>, sediment transport on the lag surface was 131 percent lower than on the non-lag surface. However, as wind speeds increased, the influence of the lag surface diminished, and no significant difference in transport was observed at wind speeds above 11 ms<sup>−1</sup>. These findings emphasize the intricate role of non-erodible elements in reducing sediment transport at lower wind speeds while enhancing transport dynamics under stronger wind conditions. These insights inform future models and guide coastal management practices.</div></div>","PeriodicalId":49246,"journal":{"name":"Aeolian Research","volume":"72 ","pages":"Article 100957"},"PeriodicalIF":3.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluid-driven surface change in sediment-limited interdune environments and relevance to Titan 沉积物限制沙丘间环境中流体驱动的地表变化及其与土卫六的相关性

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2025-03-01 Epub Date: 2025-02-01 DOI: 10.1016/j.aeolia.2025.100960

A.L. Cohen-Zada , R.C. Ewing , J. Radebaugh

Interdune areas and purported playa-type environments in Saturn’s moon Titan’s dune fields show substantial spatial variability in radar backscatter expression. Using examples from Death Valley, the Middle East, and northern China, this work evaluates terrestrial causes of spatial backscatter heterogeneity in similar aeolian environments. It introduces the importance of temporal change detection in interdune area backscatter expression. Using optical images, time-series radar synthetic aperture radar images, and coordinated meteorological and river discharge data (where available), backscatter variations are related to spatially changing sedimentary environments within sediment-limited areas, i.e., interdune and playas, and temporally changing surface or near-surface moisture conditions. In terrestrial environments, backscatter expression varies over seasonal and annual timescales as a function of the cumulative history of surface change, primarily driven by changes in surface and near-surface moisture from either precipitation or groundwater table rise and fall. On Titan, evidence for equatorial methane flow channels suggests that arid-climate surfaces may undergo temporal evolutions like those observed on Earth. Fluid flow and evaporite formation play crucial roles in the existence and alteration of patterns in Earth’s interdunes. By analogy, these mechanisms are also expected to be at work on Titan. Despite differences between terrestrial and Titan radar observations, considering surface dynamics and evolution over time on Titan may be critical for analyzing its arid, equatorial environments.

在土星的卫星土卫六的沙丘场中，沙丘间区域和所谓的playa型环境在雷达后向散射表达中显示出实质性的空间变异性。以死亡谷、中东和中国北方为例，本研究评估了相似风沙环境下空间后向散射异质性的陆地原因。介绍了时间变化检测在沙丘间背向散射表达中的重要性。利用光学图像、时间序列雷达合成孔径雷达图像以及协调的气象和河流流量数据（如有），研究了后向散射变化与沉积受限区域（即沙丘间和playas）内沉积环境的空间变化以及地表或近地表湿度条件的时间变化有关。在陆地环境中，背向散射的表达随季节和年时间尺度的变化而变化，作为地表变化累积历史的函数，主要受降水或地下水位上升和下降引起的地表和近地表水分变化的驱动。在土卫六上，赤道甲烷流动通道的证据表明，干旱气候表面可能经历了像地球上观察到的那样的时间进化。流体流动和蒸发岩的形成对地球沙丘间格局的存在和变化起着至关重要的作用。以此类推，这些机制也有望在土卫六上发挥作用。尽管陆地和土卫六的雷达观测存在差异，但考虑土卫六上的表面动力学和随时间的演变可能对分析其干旱的赤道环境至关重要。

{"title":"Fluid-driven surface change in sediment-limited interdune environments and relevance to Titan","authors":"A.L. Cohen-Zada , R.C. Ewing , J. Radebaugh","doi":"10.1016/j.aeolia.2025.100960","DOIUrl":"10.1016/j.aeolia.2025.100960","url":null,"abstract":"<div><div>Interdune areas and purported playa-type environments in Saturn’s moon Titan’s dune fields show substantial spatial variability in radar backscatter expression. Using examples from Death Valley, the Middle East, and northern China, this work evaluates terrestrial causes of spatial backscatter heterogeneity in similar aeolian environments. It introduces the importance of temporal change detection in interdune area backscatter expression. Using optical images, time-series radar synthetic aperture radar images, and coordinated meteorological and river discharge data (where available), backscatter variations are related to spatially changing sedimentary environments within sediment-limited areas, i.e., interdune and playas, and temporally changing surface or near-surface moisture conditions. In terrestrial environments, backscatter expression varies over seasonal and annual timescales as a function of the cumulative history of surface change, primarily driven by changes in surface and near-surface moisture from either precipitation or groundwater table rise and fall. On Titan, evidence for equatorial methane flow channels suggests that arid-climate surfaces may undergo temporal evolutions like those observed on Earth. Fluid flow and evaporite formation play crucial roles in the existence and alteration of patterns in Earth’s interdunes. By analogy, these mechanisms are also expected to be at work on Titan. Despite differences between terrestrial and Titan radar observations, considering surface dynamics and evolution over time on Titan may be critical for analyzing its arid, equatorial environments.</div></div>","PeriodicalId":49246,"journal":{"name":"Aeolian Research","volume":"72 ","pages":"Article 100960"},"PeriodicalIF":3.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regional differences in the grain size characteristics of surface sediments from typical barchan dunes in arid zones 干旱地区典型巴查沙丘表层沉积物粒度特征的地区差异

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2024-12-01 Epub Date: 2024-07-22 DOI: 10.1016/j.aeolia.2024.100939

Ning Jiang, Hong Cheng

The grain size characteristics of aeolian sediments are the combined result of sand sources, regional airflow regimes, dune morphology, etc., and are essential for understanding the formation and evolution of barchan dunes. Based on field investigations and laboratory experimental data, in this paper, we explored differences in the grain size characteristics of the surface sediments of barchan dunes at the southeastern edge of the Taklimakan Desert (TKLM-SE), the western (QB-W) and southern parts of the Qaidam Basin Desert (QB-S), the sand belt connecting the Badain Jaran Desert and the Tengger Desert (BT-B), and their responses to sand sources, dune morphology, and wind regimes. The main results were as follows: (i) The mean grian size distribution patterns of the windward slope toe to the leeward slope toe through the dune crest/ridge varied with different transects of the barchan dunes and different deserts, showing four types including gradually fining (GF), gradually coarsening (GC), coarsening followed by fining (CF), and fining followed by coarsening (FC). The patterns were GF and CF in the TKLM-SE; GF, GC, and FC in the BT-B; GF, GC, and CF in the QB-W; and GF in the QB-S. (ii) The interdune sediments provided the source material for the formation and development of barchan dunes and their grain size varied in different deserts. The interdune sediments were composed of gravel and very fine sand in the TKLM-SE, while they were composed of medium and fine sand in the QB-W, QB-S, and BT-B. (iii) The windward side of the barchans varied with different wind directions, and dune height affected dune surface airflow velocity and direction, changing the pattern of grain size distribution on the dune surface. The wind regime over a ten-day or half-month scale could explain the variance in the grain size distribution patterns better than that on an annual scale. (iv) Grain size characteristics of dune surface sands changed with dune shape due to changes in the surface airflow velocity and direction and the sediment-carrying capacity of the airflow. With an increasing ratio of dune height to dune width, the grain size of the dune crest sands became coarser. These results help advance our understanding of the grain size characteristics of barchan dunes and regional variabilities in their patterns.

风化沉积物的粒度特征是沙源、区域气流机制、沙丘形态等因素综合作用的结果，对于了解巴查沙丘的形成和演变至关重要。本文以野外调查和实验室实验数据为基础，探讨了塔克拉玛干沙漠东南边缘（TKLM-SE）、柴达木盆地沙漠西部（QB-W）和南部（QB-S）、连接巴丹吉林沙漠和腾格里沙漠的沙带（BT-B）的沙丘表层沉积物粒度特征的差异，以及它们对沙源、沙丘形态和风向的响应。主要结果如下(i) 从迎风坡坡脚到背风坡坡脚，通过沙丘峰顶/沙脊的平均粒度分布模式随不同的沙丘横断面和不同的沙漠而变化，呈现出四种类型，包括逐渐细化（GF）、逐渐粗化（GC）、粗化后细化（CF）和细化后粗化（FC）。在 TKLM-SE 中，其形态为 GF 和 CF；在 BT-B 中，其形态为 GF、GC 和 FC；在 QB-W 中，其形态为 GF、GC 和 CF；在 QB-S 中，其形态为 GF。(ii) 沙丘间沉积物是形成和发展沙丘的源材料，其粒度在不同沙漠中各不相同。沙丘间沉积物在 TKLM-SE 由砾石和极细沙组成，而在 QB-W、QB-S 和 BT-B 则由中沙和细沙组成。(iii) 沙丘的迎风面随风向的不同而变化，沙丘高度影响沙丘表面气流的速度和方向，从而改变沙丘表面的粒径分布模式。十天或半月尺度的风向比全年尺度的风向更能解释沙粒大小分布模式的差异。(iv) 沙丘表面沙粒大小的特徵會隨沙丘形狀而改變，這是由於沙丘表面氣流速度和方向，以及氣流攜帶沉積物的能力改變所致。随着沙丘高度与沙丘宽度之比的增加，沙丘顶沙的粒度变得更粗。这些结果有助于加深我们对巴钦沙丘粒度特征及其区域变化模式的理解。

{"title":"Regional differences in the grain size characteristics of surface sediments from typical barchan dunes in arid zones","authors":"Ning Jiang, Hong Cheng","doi":"10.1016/j.aeolia.2024.100939","DOIUrl":"10.1016/j.aeolia.2024.100939","url":null,"abstract":"<div><p>The grain size characteristics of aeolian sediments are the combined result of sand sources, regional airflow regimes, dune morphology, etc., and are essential for understanding the formation and evolution of barchan dunes. Based on field investigations and laboratory experimental data, in this paper, we explored differences in the grain size characteristics of the surface sediments of barchan dunes at the southeastern edge of the Taklimakan Desert (TKLM-SE), the western (QB-W) and southern parts of the Qaidam Basin Desert (QB-S), the sand belt connecting the Badain Jaran Desert and the Tengger Desert (BT-B), and their responses to sand sources, dune morphology, and wind regimes. The main results were as follows: (i) The mean grian size distribution patterns of the windward slope toe to the leeward slope toe through the dune crest/ridge varied with different transects of the barchan dunes and different deserts, showing four types including gradually fining (GF), gradually coarsening (GC), coarsening followed by fining (CF), and fining followed by coarsening (FC). The patterns were GF and CF in the TKLM-SE; GF, GC, and FC in the BT-B; GF, GC, and CF in the QB-W; and GF in the QB-S. (ii) The interdune sediments provided the source material for the formation and development of barchan dunes and their grain size varied in different deserts. The interdune sediments were composed of gravel and very fine sand in the TKLM-SE, while they were composed of medium and fine sand in the QB-W, QB-S, and BT-B. (iii) The windward side of the barchans varied with different wind directions, and dune height affected dune surface airflow velocity and direction, changing the pattern of grain size distribution on the dune surface. The wind regime over a ten-day or half-month scale could explain the variance in the grain size distribution patterns better than that on an annual scale. (iv) Grain size characteristics of dune surface sands changed with dune shape due to changes in the surface airflow velocity and direction and the sediment-carrying capacity of the airflow. With an increasing ratio of dune height to dune width, the grain size of the dune crest sands became coarser. These results help advance our understanding of the grain size characteristics of barchan dunes and regional variabilities in their patterns.</p></div>","PeriodicalId":49246,"journal":{"name":"Aeolian Research","volume":"70 ","pages":"Article 100939"},"PeriodicalIF":3.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141960374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Speculation on an early Pleistocene origin of the Parker dunes of southwest Arizona, USA 关于美国亚利桑那州西南部帕克沙丘早更新世起源的推测

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2024-12-01 Epub Date: 2024-10-11 DOI: 10.1016/j.aeolia.2024.100943

Yeong Bae Seong , Kenzie L. Shandonay , Ronald I. Dorn , Brian F. Gootee , Byong Yong Yu

The Parker Dunes in western Arizona, USA represent the largest dune system in the Sonoran Desert. This study presents a simple ¹⁰Be-²⁶Al cosmogenic burial age of 1.90 ± 0.20 Ma, obtained from well cuttings 240–270 m deep in Butler Valley, just east of the dune field. Given the large errors associated with burial dating, we can only speculate that this oldest known aeolian sediment within the Parker Dunes is roughly concurrent with the Bat Cave flood event ca. 2.1 Ma of the nearby Colorado River, as well as regional climatic aridity during the early Pleistocene. Since older dune deposits may be present at other locations in the Parker Dunes, its origin dates back to at least the early Pleistocene. The more important, broader implication rests in highlighting the underutilized potential of well cuttings as a sediment source for cosmogenic burial dating in aeolian research.

美国亚利桑那州西部的帕克沙丘是索诺拉沙漠中最大的沙丘系统。本研究从沙丘区东部巴特勒山谷 240 至 270 米深的钻孔中获得了简单的 10Be-26Al 宇宙成因埋藏年龄，即 1.90 ± 0.20 Ma。鉴于埋藏年代测定存在较大误差，我们只能推测帕克沙丘内已知最古老的风化沉积物与附近科罗拉多河约 2.1 Ma 的蝙蝠洞洪水事件以及更新世早期的区域气候干旱大致同时发生。由于帕克沙丘的其他位置可能存在更古老的沙丘沉积，因此其起源至少可以追溯到更新世早期。更重要、更广泛的意义在于，它强调了在风化研究中，作为宇宙成因埋藏年代测定的沉积物来源，井碴的潜力未得到充分利用。

引用次数: 0

Characterizing variability in geochemistry and mineralogy of western US dust sources 美国西部尘源的地球化学和矿物学变异特征

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2024-12-01 Epub Date: 2024-09-21 DOI: 10.1016/j.aeolia.2024.100941

Abby L. Mangum , Gregory T. Carling , Barry R. Bickmore , Nicholas Webb , DeTiare L. Leifi , Janice Brahney , Diego P. Fernandez , Kevin A. Rey , Stephen T. Nelson , Landon Burgener , Joshua J. LeMonte , Alyssa N. Thompson , Beth A. Newingham , Michael C. Duniway , Zachary T. Aanderud

Dust events originate from multiple sources in arid and semi-arid regions, making it difficult to quantify source contributions. Dust geochemical/mineralogical composition, if the sources are sufficiently distinct, can be used to quantify the contributions from different sources. To test the viability of using geochemical and mineralogical measurements to separate dust-emitting sites, we used dust samples collected between 2018 and 2020 from ten National Wind Erosion Research Network (NWERN) sites that are representative of western United States (US) dust sources. Dust composition varied seasonally at many of the sites, but within-site variability was smaller than across-site variability, indicating that the geochemical signatures are robust over time. It was not possible to separate all the sites using commonly applied principal component analysis (PCA) and cluster analysis because of overlap in dust geochemistry. However, a linear discriminant analysis (LDA) successfully separated all sites based on their geochemistry, suggesting that LDA may prove useful for separating dust sources that cannot be separated using PCA or other methods. Further, an LDA based on mineralogical data separated most sites using only a limited number of mineral phases that were readily explained by the local geologic setting. Taken together, the geochemical and mineralogical measurements generated distinct signatures of dust emissions across NWERN sites. If expanded to include a broader range of sites across the western US, a library of geochemical and mineralogical data may serve as a basis to track and quantify dust contributions from these sources.

在干旱和半干旱地区，尘埃事件有多种来源，因此很难量化来源的贡献。如果尘埃的地球化学/矿物成分来源足够明确，则可用于量化不同来源的贡献。为了测试使用地球化学和矿物学测量来区分沙尘排放源的可行性，我们使用了 2018 年至 2020 年期间从 10 个国家风蚀研究网络（NWERN）站点收集的沙尘样本，这些站点是美国西部沙尘源的代表。在许多站点，尘埃成分随季节而变化，但站点内的变化小于站点间的变化，这表明地球化学特征随时间变化是稳健的。由于粉尘地球化学特征存在重叠，因此无法使用常用的主成分分析（PCA）和聚类分析将所有地点分开。不过，线性判别分析（LDA）成功地根据地球化学特征将所有地点区分开来，这表明线性判别分析可用于区分无法用 PCA 或其他方法区分的尘源。此外，基于矿物学数据的 LDA 只使用了有限的几种矿物相来分离大多数地点，而这些矿物相很容易用当地的地质环境来解释。综合来看，地球化学和矿物学测量得出了西北地区各站点灰尘排放的不同特征。如果将范围扩大到美国西部更广泛的地点，那么地球化学和矿物学数据库就可以作为跟踪和量化这些来源的粉尘贡献的基础。

{"title":"Characterizing variability in geochemistry and mineralogy of western US dust sources","authors":"Abby L. Mangum , Gregory T. Carling , Barry R. Bickmore , Nicholas Webb , DeTiare L. Leifi , Janice Brahney , Diego P. Fernandez , Kevin A. Rey , Stephen T. Nelson , Landon Burgener , Joshua J. LeMonte , Alyssa N. Thompson , Beth A. Newingham , Michael C. Duniway , Zachary T. Aanderud","doi":"10.1016/j.aeolia.2024.100941","DOIUrl":"10.1016/j.aeolia.2024.100941","url":null,"abstract":"<div><div>Dust events originate from multiple sources in arid and semi-arid regions, making it difficult to quantify source contributions. Dust geochemical/mineralogical composition, if the sources are sufficiently distinct, can be used to quantify the contributions from different sources. To test the viability of using geochemical and mineralogical measurements to separate dust-emitting sites, we used dust samples collected between 2018 and 2020 from ten National Wind Erosion Research Network (NWERN) sites that are representative of western United States (US) dust sources. Dust composition varied seasonally at many of the sites, but within-site variability was smaller than across-site variability, indicating that the geochemical signatures are robust over time. It was not possible to separate all the sites using commonly applied principal component analysis (PCA) and cluster analysis because of overlap in dust geochemistry. However, a linear discriminant analysis (LDA) successfully separated all sites based on their geochemistry, suggesting that LDA may prove useful for separating dust sources that cannot be separated using PCA or other methods. Further, an LDA based on mineralogical data separated most sites using only a limited number of mineral phases that were readily explained by the local geologic setting. Taken together, the geochemical and mineralogical measurements generated distinct signatures of dust emissions across NWERN sites. If expanded to include a broader range of sites across the western US, a library of geochemical and mineralogical data may serve as a basis to track and quantify dust contributions from these sources.</div></div>","PeriodicalId":49246,"journal":{"name":"Aeolian Research","volume":"70 ","pages":"Article 100941"},"PeriodicalIF":3.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An evaluation of different approaches for estimating shear velocity in aeolian research studies 评估风化研究中估算剪切速度的不同方法

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2024-12-01 Epub Date: 2024-11-12 DOI: 10.1016/j.aeolia.2024.100945

Pei Zhang , Brandon L. Edwards , Nicholas P. Webb , Andrew Trautz , John A. Gillies , Nancy P. Ziegler , Justin W. Van Zee

Sonic anemometry represents an important technological advance for aeolian studies, fostering better understanding of near-surface turbulence and improved methods for estimating shear velocity (

u_{*}

). Here, we compare

u_{*}

estimated from the Law of the Wall approach and from four methods that use 3-D wind vector measurements from sonic anemometers: double rotation, triple rotation, planar fit, and a newly developed approach based on invariants of the Reynolds stress tensor. Data were collected over 7.5 months at the Jornada Experimental Range in the Chihuahuan Desert, southern New Mexico, USA. We used

u_{*}

estimates from the double rotation method as a reference for comparing the other methods because of its prevalence in the aeolian literature. On average,

u_{*}

estimates from the other three methods are within 5.0 % of estimates from the double rotation approach. Estimates from the triple rotation approach were 2.2 % lower on average. Estimates from the planar fit method were the most similar, within 1.3 % on average. Estimates from the stress tensor approach were 4.9 % larger on average. We found significant discrepancies, ranging from −14.7 % to 13.7 %, among

u_{*}

estimated from the Law of the Wall and the other methods. This underscores the need for careful methodology selection to ensure accurate characterization of boundary layer turbulence.

声波风速测量是风化研究的一项重要技术进步，有助于更好地了解近地表湍流和改进剪切速度（u∗）的估算方法。在这里，我们比较了根据壁面定律方法和利用声波风速计三维风矢量测量的四种方法估算的 u∗：双旋转、三旋转、平面拟合和基于雷诺应力张量不变式的新开发方法。我们在美国新墨西哥州南部奇瓦瓦沙漠的乔纳达实验场收集了 7.5 个月的数据。我们使用双旋转法估算的 u∗ 作为比较其他方法的参考，因为该方法在风化文献中非常普遍。平均而言，其他三种方法得出的 u∗ 估计值与双旋转法得出的估计值相差 5.0%。三重旋转法的估计值平均低 2.2%。平面拟合方法的估计值最为接近，平均在 1.3 %以内。应力张量法的估计值平均高出 4.9%。我们发现，用墙体定律和其他方法估算的 u∗ 存在很大差异，从-14.7%到13.7%不等。这强调了需要谨慎选择方法，以确保边界层湍流的准确特征。

{"title":"An evaluation of different approaches for estimating shear velocity in aeolian research studies","authors":"Pei Zhang , Brandon L. Edwards , Nicholas P. Webb , Andrew Trautz , John A. Gillies , Nancy P. Ziegler , Justin W. Van Zee","doi":"10.1016/j.aeolia.2024.100945","DOIUrl":"10.1016/j.aeolia.2024.100945","url":null,"abstract":"<div><div>Sonic anemometry represents an important technological advance for aeolian studies, fostering better understanding of near-surface turbulence and improved methods for estimating shear velocity (<span><math><msub><mi>u</mi><mrow><mo>∗</mo></mrow></msub></math></span>). Here, we compare <span><math><msub><mi>u</mi><mrow><mo>∗</mo></mrow></msub></math></span> estimated from the Law of the Wall approach and from four methods that use 3-D wind vector measurements from sonic anemometers: double rotation, triple rotation, planar fit, and a newly developed approach based on invariants of the Reynolds stress tensor. Data were collected over 7.5 months at the Jornada Experimental Range in the Chihuahuan Desert, southern New Mexico, USA. We used <span><math><msub><mi>u</mi><mrow><mo>∗</mo></mrow></msub></math></span> estimates from the double rotation method as a reference for comparing the other methods because of its prevalence in the aeolian literature. On average, <span><math><msub><mi>u</mi><mrow><mo>∗</mo></mrow></msub></math></span> estimates from the other three methods are within 5.0 % of estimates from the double rotation approach. Estimates from the triple rotation approach were 2.2 % lower on average. Estimates from the planar fit method were the most similar, within 1.3 % on average. Estimates from the stress tensor approach were 4.9 % larger on average. We found significant discrepancies, ranging from −14.7 % to 13.7 %, among <span><math><msub><mi>u</mi><mrow><mo>∗</mo></mrow></msub></math></span> estimated from the Law of the Wall and the other methods. This underscores the need for careful methodology selection to ensure accurate characterization of boundary layer turbulence.</div></div>","PeriodicalId":49246,"journal":{"name":"Aeolian Research","volume":"70 ","pages":"Article 100945"},"PeriodicalIF":3.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carcinogenic and non-carcinogenic health risks of heavy metals in windborne sediments from a residential area (Case study: Tabas, Iran) 居民区风载沉积物中重金属的致癌和非致癌健康风险（案例研究：伊朗塔巴斯）

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research

Pub Date : 2024-12-01 Epub Date: 2024-07-06 DOI: 10.1016/j.aeolia.2024.100938

Hojat Emami , Mahsa Memarzadeh , Fateme Naghizade Asl

Dust particles are considered as a very important way of soil contamination by heavy metals. Therefore, this study was conducted to evaluate the concentration of heavy metals and their health risk in windborne sediments. For this purpose, sediment traps were installed in five dominant wind directions including north, northeast, northwest, west, and southwest, and center of Tabas city (Iran) to collect the suspended sediments in the air. Sediment sampling was conducted monthly from January to December 2021. The concentrations of heavy metals were measured using atomic adsorption method followed by extraction by aqua regia, and the carcinogenic and non-carcinogenic health risks of heavy metals for children and adults were evaluated during different months of the year. According to the results, the maximum and minimum amounts of windborne sediments found in northwest (85.66 gm⁻²) and west (29.3 gm⁻²), respectively. Monthly variations in windborne sediments discharge also revealed that the maximum amounts of windborne sediments occurred in September and November 2021 from northeast (125 and 117 mgkg⁻¹, respectively). The maximum concentrations of cadmium (0.82 mg/kg) were found in the west of Tabas, while those of lead (192.72 mg/kg), and nickel (227.34 mg/kg) were obtained in the city center. In addition, the highest carcinogenic and non-carcinogenic risks belonged to nickel and the lowest risks were obtained for lead. Also, the carcinogenic risk of cadmium was higher than lead but lower than nickel. In general, the carcinogenic and non-carcinogenic risks of the studied heavy metals were low (less than 1).

尘埃微粒被认为是重金属污染土壤的一个非常重要的途径。因此，本研究对风载沉积物中的重金属浓度及其健康风险进行了评估。为此，在五个主要风向（包括北风、东北风、西北风、西风、西南风）和塔巴斯市（伊朗）中心安装了沉积物收集器，以收集空气中的悬浮沉积物。沉积物采样从 2021 年 1 月至 12 月每月进行一次。采用原子吸附法测定重金属浓度，然后用王水萃取，并评估了一年中不同月份重金属对儿童和成人的致癌和非致癌健康风险。结果显示，西北部（85.66 gm-2）和西部（29.3 gm-2）的风载沉积物含量最高，最低。风载沉积物排放量的月度变化也显示，2021 年 9 月和 11 月来自东北部的风载沉积物量最大（分别为 125 毫克千克-1 和 117 毫克千克-1）。镉的最高浓度（0.82 毫克/千克）出现在塔巴斯西部，而铅（192.72 毫克/千克）和镍（227.34 毫克/千克）的最高浓度则出现在市中心。此外，镍的致癌和非致癌风险最高，铅的风险最低。此外，镉的致癌风险高于铅，但低于镍。总的来说，所研究的重金属的致癌和非致癌风险都很低（小于 1）。

{"title":"Carcinogenic and non-carcinogenic health risks of heavy metals in windborne sediments from a residential area (Case study: Tabas, Iran)","authors":"Hojat Emami , Mahsa Memarzadeh , Fateme Naghizade Asl","doi":"10.1016/j.aeolia.2024.100938","DOIUrl":"https://doi.org/10.1016/j.aeolia.2024.100938","url":null,"abstract":"<div><p>Dust particles are considered as a very important way of soil contamination by heavy metals. Therefore, this study was conducted to evaluate the concentration of heavy metals and their health risk in windborne sediments. For this purpose, sediment traps were installed in five dominant wind directions including north, northeast, northwest, west, and southwest, and center of Tabas city (Iran) to collect the suspended sediments in the air. Sediment sampling was conducted monthly from January to December 2021. The concentrations of heavy metals were measured using atomic adsorption method followed by extraction by aqua regia, and the carcinogenic and non-carcinogenic health risks of heavy metals for children and adults were evaluated during different months of the year. According to the results, the maximum and minimum amounts of windborne sediments found in northwest (85.66 gm<sup>−2</sup>) and west (29.3 gm<sup>−2</sup>), respectively. Monthly variations in windborne sediments discharge also revealed that the maximum amounts of windborne sediments occurred in September and November 2021 from northeast (125 and 117 mgkg<sup>−1</sup>, respectively). The maximum concentrations of cadmium (0.82 mg/kg) were found in the west of Tabas, while those of lead (192.72 mg/kg), and nickel (227.34 mg/kg) were obtained in the city center. In addition, the highest carcinogenic and non-carcinogenic risks belonged to nickel and the lowest risks were obtained for lead. Also, the carcinogenic risk of cadmium was higher than lead but lower than nickel. In general, the carcinogenic and non-carcinogenic risks of the studied heavy metals were low (less than 1).</p></div>","PeriodicalId":49246,"journal":{"name":"Aeolian Research","volume":"70 ","pages":"Article 100938"},"PeriodicalIF":3.1,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141595120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0