DOI: 10.1007/s00382-015-2722-y
Scopus记录号: 2-s2.0-84936806535
论文题名: Amplification of ENSO effects on Indian summer monsoon by absorbing aerosols
作者: Kim M.-K. ; Lau W.K.M. ; Kim K.-M. ; Sang J. ; Kim Y.-H. ; Lee W.-S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-07-08 起始页码: 2657
结束页码: 2671
语种: 英语
英文关键词: Absorbing aerosol
; Black carbon
; Dust
; EHP
; ENSO
; Monsoon
英文摘要: In this study, we present observational evidence, based on satellite aerosol measurements and MERRA reanalysis data for the period 1979-2011, indicating that absorbing aerosols can have strong influence on seasonal-to-interannual variability of the Indian summer monsoon rainfall, including amplification of ENSO effects. We find a significant correlation between ENSO (El Nino Southern Oscillation) and aerosol loading in April- May, with La Nina (El Nino) conditions favoring increased (decreased) aerosol accumulation over northern India, with maximum aerosol optical depth over the Arabian Sea and Northwestern India, indicative of strong concentration of dust aerosols transported from West Asia and Middle East deserts. Composite analyses based on a normalized aerosol index (NAI) show that high concentration of aerosol over northern India in April-May is associated with increased moisture transport, enhanced dynamically induced warming of the upper troposphere over the Tibetan Plateau, and enhanced rainfall over northern India and the Himalayan foothills during May-June, followed by a subsequent suppressed monsoon rainfall over all India, consistent with the elevated heat pump (EHP) hypothesis (Lau et al. in Clim Dyn 26:855-864, 2006. doi:10.1007/s00382-006-0114-z). Further analyses from sub-sampling of ENSO years, with normal (<1-σ), and abnormal (>1-σ) NAI over northern India respectively show that the EHP may lead to an amplification of the Indian summer monsoon response to ENSO forcing, particularly with respect to the increased rainfall over the Himalayan foothills, and the warming of the upper troposphere over the Tibetan Plateau. Our results suggest that absorbing aerosol, particular desert dusts can strongly modulate ENSO influence, and possibly play important roles as a feedback agent in climate change in Asian monsoon regions. © The Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53623
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Atmospheric Science, Kongju National University, Gongju, South Korea; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Laboratory for Atmospheres, NASA Goddard Space Flight Center, Greenbelt, MD, United States; School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, South Korea; APEC Climate Center, Busan, South Korea
Recommended Citation:
Kim M.-K.,Lau W.K.M.,Kim K.-M.,et al. Amplification of ENSO effects on Indian summer monsoon by absorbing aerosols[J]. Climate Dynamics,2016-01-01,46(2017-07-08)