Spatial and temporal characteristics of dust storms in China and its surrounding regions, 1960-1999 : Relations to source area and climate
Spatial and temporal characteristics of dust storms in China and its surrounding regions, 1960-1999 : Relations to source area and climate
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DOI：
10.1029/2000jd900665
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发表时间：
2001-05
影响因子：
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通讯作者：
Jimin Sun;Ming-Zheng Zhang;Tung-sheng Liu
中科院分区：
文献类型：
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作者：
Jimin Sun;Ming-Zheng Zhang;Tung-sheng Liu
通过对中国近40年沙尘暴资料的整理和分析，可以对沙尘暴的气象条件、沙尘输送路径和风沙源区进行估计。结果表明，中国沙尘暴与锋面系统和蒙古气旋性低压有密切的联系。沙尘暴的空间分布表明，中国及其周边地区的沙尘暴有两个主要源区。主要来源是蒙古和北方中国的戈壁沙漠。另一个源区是中国西部的塔克拉玛干沙漠。然而，从这两个来源夹带的灰尘作出不同的贡献，顺风沉积区。在大多数情况下，从蒙古和中国的戈壁沙漠携带的沙尘物质只能携带到海拔5000米，然后通过西风带长距离输送（约5000公里）。这些物质不是黄土高原等近源地区沙尘的主要来源，但却是遥远的北太平洋远洋沉积物风成组分的重要来源。
Compilation and analysis of the past 40 years of dust storm reports from China allow estimation of the meteorological conditions of dust storms, dust transport routes, and eolian source regions. Our results indicate that dust storms in China are highly associated with the frontal systems and the Mongolian cyclonic depression. The spatial distribution of dust storms indicates that there are two dominant source regions of eolian dust raised from China and its surrounding regions. The major source is the gobi deserts in Mongolia and northern China. Another source region is the Taklimakan Desert in western China. However, dust entrained from the two sources makes different contributions to downwind deposition regions. In most cases, dust materials entrained from the gobi deserts of Mongolia and China can only be entrained to an elevation of 5000 m and then transported over long distances (∼5000 km) by the westerlies. These materials are not the main sources of the dust deposited in the proximal region, such as the Chinese Loess Plateau, but they are important sources of the eolian fraction of pelagic sediment in the remote North Pacific Ocean.