DOI: 10.1016/j.atmosres.2017.11.002
Scopus记录号: 2-s2.0-85033576673
论文题名: Impact of atmospheric circulation types on southwest Asian dust and Indian summer monsoon rainfall
作者: Kaskaoutis D.G. ; Houssos E.E. ; Solmon F. ; Legrand M. ; Rashki A. ; Dumka U.C. ; Francois P. ; Gautam R. ; Singh R.P.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 201 起始页码: 189
结束页码: 205
语种: 英语
英文关键词: Arabian Sea
; Atmospheric circulation types
; Dust
; Indian monsoon rainfall
; RegCM4
; Synoptic meteorology
Scopus关键词: Aerosols
; Arid regions
; Atmospheric thermodynamics
; Climate change
; Climate models
; Climatology
; Dust
; Heat convection
; Life cycle
; Meteorology
; Sea level
; Arabian sea
; Atmospheric circulation types
; Indian monsoon rainfall
; RegCM4
; Synoptic meteorology
; Rain
; aerosol
; atmospheric circulation
; atmospheric dynamics
; climate modeling
; dust
; monsoon
; rainfall
; regional climate
; synoptic meteorology
; Arabian Peninsula
; Arabian Sea
; Ganges Basin
; Horn of Africa
; India
; Indian Ocean
; Pakistan
英文摘要: This study examines the meteorological feedback on dust aerosols and rainfall over the Arabian Sea and India during the summer monsoon using satellite data, re-analysis and a regional climate model. Based on days with excess aerosol loading over the central Ganges basin during May – September, two distinct atmospheric circulation types (weather clusters) are identified, which are associated with different dust-aerosol and rainfall distributions over south Asia, highlighting the role of meteorology on dust emissions and monsoon rainfall. Each cluster is characterized by different patterns of mean sea level pressure (MSLP), geopotential height at 700 hPa (Z700) and wind fields at 1000 hPa and at 700 hPa, thus modulating changes in dust-aerosol loading over the Arabian Sea. One cluster is associated with deepening of the Indian/Pakistan thermal low leading to (i) increased cyclonicity and thermal convection over northwestern India and Arabian Peninsula, (ii) intensification of the southwest monsoon off the Horn of Africa, iii) increase in dust emissions from Rub-Al-Khali and Somalian deserts, (iv) excess dust accumulation over the Arabian Sea and, (v) strengthening of the convergence of humid air masses and larger precipitation over Indian landmass compared to the other cluster. The RegCM4.4 model simulations for dust-aerosol and precipitation distributions support the meteorological fields and satellite observations, while the precipitation over India is positively correlated with the aerosol loading over the Arabian Sea on daily basis for both weather clusters. This study highlights the key role of meteorology and atmospheric dynamics on dust life cycle and rainfall over the monsoon-influenced south Asia. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108993
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Atmospheric Research Team, Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Athens, 11810, Greece; Laboratory of Meteorology, Department of Physics, University of Ioannina, Ioannina, 45110, Greece; Laboratoire d'Aérologie Toulouse, Toulouse, 31400, France; LOA, University of Lille-1, Villeneuve d'Ascq, 59655, France; Natural Resources and Environment College, Ferdowsi University of Mashhad, Mashhad, Iran; Aryabhatta Research Institute of Observational Sciences, Nainital, 263 001, India; Environmental Defense Fund, Washington DC, 20009, United States; School of Life and Environmental Sciences, Schmid College of Science and Technology, Chapman University, Orange, California 92866, United States
Recommended Citation:
Kaskaoutis D.G.,Houssos E.E.,Solmon F.,et al. Impact of atmospheric circulation types on southwest Asian dust and Indian summer monsoon rainfall[J]. Atmospheric Research,2018-01-01,201