Shifts of dust source regions over central Asia and the Tibetan Plateau: Connections with the Arctic oscillation and the westerly jet
Shifts of dust source regions over central Asia and the Tibetan Plateau: Connections with the Arctic oscillation and the westerly jet
复制标题
中亚和青藏高原沙尘源区的变化：与北极涛动和西风急流的联系
DOI：
10.1016/j.atmosenv.2007.12.025
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发表时间：
2008-03
影响因子：
5
通讯作者：
中科院分区：
文献类型：
--
作者：
对1961-2000年中国681个站和1980-2000年蒙古681个站沙尘暴和扬沙资料的分析表明，中亚和青藏高原沙尘源区存在着从青藏高原向蒙古的月际和年际北移。这种月变化与200 hPa西风急流的位置以及500 hPa西风急流在中亚和青藏高原的位置和强度密切相关。年际变化的原因因地区而异。青藏高原的西风急流驱动了青藏高原北部的变化，中亚中纬度西风强度、北极涛动和东亚冬季风可能是青藏高原北部河西走廊地区的驱动因素，蒙古地区的北极涛动和西风急流的位置可能是影响青藏高原北部的驱动因素。这些原因与AO的变化密切相关，AO的变化可能提供了东亚和北大西洋气候变化与沙尘长距离输送之间的联系。这种联系可以解释沙尘源区在年际和千年时间尺度上的变化以及中国黄土和北大西洋深海沉积物中记录的大致同步的气候变化。
An analysis of dust storms and blowing sand records at 681 stations in China during 1961–2000 and in Mongolia during 1980–2000 reveals that the dust source regions in central Asia and the Tibetan Plateau have monthly and interannual northward shifts from the Tibetan Plateau to Mongolia. The monthly shift is closely related to the location of the 200hPa westerly jet and to the location and intensity of the 500hPa westerly jet over central Asia and the Tibetan Plateau. The causes for interannual shifts vary by region. The westerly jet appears to drive the shift on the Tibetan Plateau; the intensity of the central Asian mid-latitude westerly, the Arctic oscillation (AO) and the East Asian winter monsoon may be the drivers in the Hexi Corridor region to the north of the Tibetan Plateau; and the AO and the location of the westerly jet in the Mongolian region. All these causes are closely related to the AO variations, which may provide a connection between climatic changes in East Asia and the North Atlantic, and the long-distance transport of dust. This connection could explain the shifts of dust source regions at interannual and millennial timescales and the roughly synchronous climate changes recorded in the Chinese loess and deep-sea sediments in the North Atlantic Ocean.
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DOI：
--
发表时间：
1985
期刊：
--
影响因子：
--
作者：
Dongsheng Liu
通讯作者：
Dongsheng Liu
影响因子：
64.8
作者：
Coale, KH;Johnson, KS;Kudela, R
通讯作者：
Kudela, R
影响因子：
64.8
作者：
BOND, G;BROECKER, W;BONANI, G
通讯作者：
BONANI, G
DOI：
10.1016/s0031-0182(99)00034-6
发表时间：
1999-08-15
影响因子：
3
作者：
Ding, ZL;Xiong, SF;Liu, TS
通讯作者：
Liu, TS
影响因子：
56.9
作者：
Bishop, JKB;Davis, RE;Sherman, JT
通讯作者：
Sherman, JT