Recent advances in our understanding of dust source emission processes
Recent advances in our understanding of dust source emission processes
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DOI：
10.1177/0309133313479391
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发表时间：
2013-04
期刊：
影响因子：
--
通讯作者：
Dr Robert Bryant
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文献类型：
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作者：
Dr Robert Bryant
沙尘循环通过与生物地球化学循环以及大气直接和间接辐射强迫的相互作用，在陆地-大气-海洋系统中发挥着重要作用。现有的全球沙尘输送、大气处理和沉积模式的限制因素之一是数据的质量和可得性，以便根据来源区域的现场数据对排放方案进行评价和验证。本文综述了最近关于沙尘源内部或沙尘源上的风沙过程的研究，重点介绍了沙尘排放数据的检索、特定地形沙尘排放的贡献和变异性的量化以及利用遥感数据通过与沙尘源地貌的直接比较来调和沙尘暴清单的研究。这些案例研究突出了实地测量和区域对利用遥感数据得出的沙尘循环的重要组成部分的了解方面的重大进展。然而，最近的研究还表明，大多数源区在候选地貌的粉尘排放方面表现出显著的时空异质性，这对在与气候模式相关的尺度上纳入粉尘排放方案的战略具有直接影响。为了适应这些因素和其他重要的尺度问题，需要进一步的研究来增加我们在更长的时间内对更广泛的粉尘源类型和地貌背景的量化。
The dust cycle can play an important role in the land–atmosphere–ocean system through interaction with biogeochemical cycles and direct and indirect radiative forcing of the atmosphere. One of the limiting factors for existing global models of dust transport, atmospheric processing and deposition is the quality and availability of data to allow evaluation and validation of emission schemes against in situ data from source regions. This review provides a critical overview of recent studies of aeolian processes from within or on dust sources, and focuses on studies dealing with retrieval of dust emission data, quantification of the contribution and variability of dust emissions from specific landforms, and the use of remote sensing data to reconcile dust storm inventories by direct comparison to dust source geomorphology. These case studies highlight significant advances in both field measurement and regional understanding of important components of the dust cycle derived through use of remote sensing data. However, recent research also demonstrates that most source regions exhibit significant spatial and temporal heterogeneity in dust emissions from candidate geomorphologies, which has direct implications for strategies aimed at inclusion of dust emission schemes at a scale relevant to climate models. To accommodate these factors and other significant scaling issues, additional research is needed to increase our quantification of a wider range of dust source types and geomorphological contexts over longer time periods.