期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2009
卷号：106
期号：49
页码：20564-20571
DOI：10.1073/pnas.0711850106
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Dust plays a vital role in climate and biophysical feedbacks in the Earth system. One source of dust, the Bodele Depression in Chad, is estimated to produce about half the mineral aerosols emitted from the Sahara, which is the world's largest source. By using a variety of new remote sensing data, regional modeling, trajectory models, chemical analyses of dust, and future climate simulations, we investigate the current and past sensitivity of the Bodele. We show that minor adjustments to small features of the atmospheric circulation, such as the Bodele Low-Level Jet, could profoundly alter the behavior of this feature. Dust production during the mid-Holocene ceased completely from this key source region. Although subject to a great deal of uncertainty, some simulations of the 21st century indicate the potential for a substantial increase in dust production by the end of the century in comparison with current values.
关键词：mineral aerosol ; regional climate model ; low-level jet
