globalchange  > 科学计划与规划
DOI: 10.1002/2015GL063217
论文题名:
Twentieth century dust lows and the weakening of the westerly winds over the Tibetan Plateau
作者: Grigholm B.; Mayewski P.A.; Kang S.; Zhang Y.; Morgenstern U.; Schwikowski M.; Kaspari S.; Aizen V.; Aizen E.; Takeuchi N.; Maasch K.A.; Birkel S.; Handley M.; Sneed S.
刊名: Geophysical Research Letters
ISSN: 0094-8811
EISSN: 1944-8542
出版年: 2015
卷: 42, 期:7
起始页码: 2434
结束页码: 2441
语种: 英语
英文关键词: atmospheric circulation ; atmospheric dust ; climate proxy ; glaciochemistry ; ice cores ; paleoclimate
Scopus关键词: Atmospheric pressure ; Calcium ; Ice ; Meteorology ; Atmospheric circulation ; Atmospheric dust ; Climate proxies ; Glaciochemistry ; Ice core ; Paleoclimates ; Dust ; atmospheric pressure ; climate modeling ; concentration (composition) ; dust ; twentieth century ; westerly ; wind velocity ; zonal wind ; China ; Qinghai-Xizang Plateau
英文摘要: Understanding past atmospheric dust variability is necessary to put modern atmospheric dust into historical context and assess the impacts of dust on the climate. In Asia, meteorological data of atmospheric dust is temporally limited, beginning only in the 1950s. High-resolution ice cores provide the ideal archive for reconstructing preinstrumental atmospheric dust concentrations. Using a ∼500 year (1477-1982 A.D.) annually resolved calcium (Ca) dust proxy from a Tibetan Plateau (TP) ice core, we demonstrate the lowest atmospheric dust concentrations in the past ∼500 years during the latter twentieth century. Declines in late nineteenth to twentieth century Ca concentrations significantly correspond with regional zonal wind trends from two reanalysis models, suggesting that the Ca record provides a proxy for the westerlies. Twentieth century warming and attendant atmospheric pressure reductions over northern Asia have potentially reduced temperature/pressure gradients resulting in lower zonal wind velocities and associated dust entrainment/transport in the past ∼500 years over the TP. ©2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928697803&doi=10.1002%2f2015GL063217&partnerID=40&md5=ed10299de63a087bab60783f7b69f182
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8427
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Climate Change Institute, School of Earth and Climate Sciences, University of Maine, Orono, ME, United States

Recommended Citation:
Grigholm B.,Mayewski P.A.,Kang S.,et al. Twentieth century dust lows and the weakening of the westerly winds over the Tibetan Plateau[J]. Geophysical Research Letters,2015-01-01,42(7).
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