Arid
DOI10.3390/atmos9110438
Impact of Snow Darkening by Deposition of Light-Absorbing Aerosols on Snow Cover in the Himalayas-Tibetan Plateau and Influence on the Asian Summer Monsoon: A Possible Mechanism for the Blanford Hypothesis
Lau, William K. M.1; Kim, Kyu-Myong2
通讯作者Lau, William K. M.
来源期刊ATMOSPHERE
ISSN2073-4433
出版年2018
卷号9期号:11
英文摘要

The impact of snow darkening by deposition of light-absorbing aerosols (LAAs) on snow cover over the Himalayas-Tibetan Plateau (HTP) and the influence on the Asian summer monsoon were investigated using the NASA Goddard Earth Observing System Model Version 5 (GEOS-5). The authors found that during April-May-June, the deposition of LAAs on snow led to a reduction in surface albedo, initiating a sequence of feedback processes, starting with increased net surface solar radiation, rapid snowmelt in the HTP and warming of the surface and upper troposphere, followed by enhanced low-level southwesterlies and increased dust loading over the Himalayas-Indo-Gangetic Plain. The warming was amplified by increased dust aerosol heating, and subsequently amplified by latent heating from enhanced precipitation over the Himalayan foothills and northern India, via the elevated heat pump (EHP) effect during June-July-August. The reduced snow cover in the HTP anchored the enhanced heating over the Tibetan Plateau and its southern slopes, in conjunction with an enhancement of the Tibetan Anticyclone, and the development of an anomalous Rossby wave train over East Asia, leading to a weakening of the subtropical westerly jet, and northward displacement and intensification of the Mei-Yu rain belt. The authors’ results suggest that the atmosphere-land heating induced by LAAs, particularly desert dust, plays a fundamental role in physical processes underpinning the snow-monsoon relationship proposed by Blanford more than a century ago.


英文关键词snow darkening light-absorbing aerosols dust and black carbon elevated heat pump effect snow cover-monsoon relationship Blanford hypothesis
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000451306900025
WOS关键词CATCHMENT-BASED APPROACH ; LAND-SURFACE PROCESSES ; INDIAN MONSOON ; BLACK CARBON ; APPARENT RELATIONSHIP ; RAINFALL PATTERNS ; DEPTH ANOMALIES ; DESERT DUST ; MODEL ; CIRCULATION
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/207872
作者单位1.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA;
2.NASA Goddard Space Flight Ctr, Climate & Radiat Lab, Greenbelt, MD 20771 USA
推荐引用方式
GB/T 7714
Lau, William K. M.,Kim, Kyu-Myong. Impact of Snow Darkening by Deposition of Light-Absorbing Aerosols on Snow Cover in the Himalayas-Tibetan Plateau and Influence on the Asian Summer Monsoon: A Possible Mechanism for the Blanford Hypothesis[J],2018,9(11).
APA Lau, William K. M.,&Kim, Kyu-Myong.(2018).Impact of Snow Darkening by Deposition of Light-Absorbing Aerosols on Snow Cover in the Himalayas-Tibetan Plateau and Influence on the Asian Summer Monsoon: A Possible Mechanism for the Blanford Hypothesis.ATMOSPHERE,9(11).
MLA Lau, William K. M.,et al."Impact of Snow Darkening by Deposition of Light-Absorbing Aerosols on Snow Cover in the Himalayas-Tibetan Plateau and Influence on the Asian Summer Monsoon: A Possible Mechanism for the Blanford Hypothesis".ATMOSPHERE 9.11(2018).
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