GSTDTAP  > 气候变化
DOI10.1002/joc.4710
Trends in aerosol optical properties over South Asia
Srivastava, Rohit
2017
发表期刊INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
EISSN1097-0088
出版年2017
卷号37期号:1
文章类型Article
语种英语
国家India
英文摘要

Spatial variation of trends in MODerate resolution Imaging Spectroradiometer (MODIS) remote sensing-derived aerosol optical properties, namely, aerosol optical depth (AOD) at 0.55 mu m and Angstrom exponent (alpha) from 2001 to 2014, is estimated on annual and seasonal basis over South Asia. Positive trends in annual mean AOD are found over 56% area of continental regions of South Asia where remote sensing data could retrieve, while similar to 40% of Indian region show increasing trends in AOD. During winter and post-monsoon, > 70% of the Indian subcontinent show positive trends in AOD due to increase in biomass burning emissions and owing to shallow boundary layer height during the seasons. The increasing trends in both AOD and alpha over central, north and some part of south, east and northeast India are found, which corroborate that fine-mode aerosols are increasing over the regions. The AOD exhibits negative trends over northwest, north, central, west and east region of India; and Pakistan and Sri Lanka during pre-monsoon. The negative trends in AODs are found over maximum part of the South Asian continent during monsoon. The significant and strong positive trends in AOD (2-3% per year) and alpha are found in the Bay of Bengal (BoB) and the Arabian Sea, moreover post-monsoon and monsoon seasons AODs exhibit significant and strong (> 6% per annum) increasing trends in north BoB. Such positive trends reveal the enhancement in the abundant of fine-mode aerosols in the oceanic regions. Spatial variabilities in the AOD and.. trends give rise to significant differential radiative impact in the regions which affect the atmospheric dynamics and also influence the extreme events such as tropical cyclones in South Asian regions. The trend informations will be useful in improving the emission inventories and our understanding on aerosols in regional and global climate.


英文关键词aerosol trends optical depth Angstrom exponent South Asia MODIS remote sensing
领域气候变化
收录类别SCI-E
WOS记录号WOS:000392415700027
WOS关键词BLACK CARBON ; DEPTH ; CLIMATOLOGY ; EMISSIONS ; MONSOON ; AERONET ; INDIA
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/37678
专题气候变化
作者单位Indian Ctr Climate & Societal Impacts Res, Kachchh 370465, Gujarat, India
推荐引用方式
GB/T 7714
Srivastava, Rohit. Trends in aerosol optical properties over South Asia[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(1).
APA Srivastava, Rohit.(2017).Trends in aerosol optical properties over South Asia.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(1).
MLA Srivastava, Rohit."Trends in aerosol optical properties over South Asia".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.1(2017).
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