globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50836
论文题名:
Recent global dust trend and connections to climate forcing
作者: Shao Y.; Klose M.; Wyrwoll K.-H.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:19
起始页码: 11107
结束页码: 11118
语种: 英语
英文关键词: AMO ; climate change ; dust ; global dust trend ; MEI ; NAO
Scopus关键词: Atmospheric pressure ; Climate change ; Earth (planet) ; Global warming ; Sediments ; AMO ; Atlantic multidecadal oscillations ; global dust trend ; MEI ; NAO ; Negative correlation ; North Atlantic oscillations ; Paleoclimate research ; Dust ; climate change ; climate forcing ; concentration (composition) ; data set ; dust ; El Nino-Southern Oscillation ; North Atlantic Oscillation ; trend analysis ; visibility ; Australia ; Middle East ; North Africa ; Northeast Asia ; South Africa ; South America
英文摘要: Dust is an important indicator of climate change. In paleoclimate research, sediments bearing signals of dust deposition offer a rich archive for climate change history. However, the dust-climate link is very complex due to the various direct and indirect feedbacks in the Earth system. In this study, we examine two issues: (1) given the recent global warming, what are the dust variations, both globally and in key dust regions, and (2) what are the climate drivers behind the variations? Using synoptic data for the period 1974-2012, we analyzed the global trend of dust frequency and visibility-derived dust concentrations and their characteristics in key dust regions, including North Africa, the Middle East, Southwest Asia, Northeast Asia, South America, and Australia. We also examined the likely climate drivers for dust variations in the different regions by computing the correlations between the time series of dust and of major climate indices - the Multivariate El Niño/Southern Oscillation Index, North Atlantic Oscillation, and Atlantic Multidecadal Oscillation (AMO). It was found that over the period 1984-2012, the global mean (excluding North America and Europe) near-surface dust concentration decreased at 1.2% yr-1. This decrease is mainly due to reduced dust activities in North Africa, accompanied by reduced activities in Northeast Asia, South America, and South Africa. A significant negative correlation between Saharan dust and AMO was detected, and it seems reasonable to suggest that under present climate, the global dust trend is determined by the climate systems governing the Atlantic and North African regimes. Key Points The recent history of global dust frequency and concentration is investigated Dust variations are determined, both globally and in key dust regions Climate drivers behind the dust variations are identified ©2013. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63275
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Institute for Geophysics and Meteorology, University of Cologne, Kerpener Str. 13, Cologne, NRW 50923, Germany; School of Earth and Environment, University of Western Australia, Crawley WA, Australia

Recommended Citation:
Shao Y.,Klose M.,Wyrwoll K.-H.. Recent global dust trend and connections to climate forcing[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(19)
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