干旱区生态环境知识资源中心(Arid): Long-term (2008-2017) analysis of atmospheric composite aerosol and black carbon radiative forcing over a semi-arid region in southern India: Model results and ground measurement

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DOI	10.1016/j.atmosenv.2020.117840
	Long-term (2008-2017) analysis of atmospheric composite aerosol and black carbon radiative forcing over a semi-arid region in southern India: Model results and ground measurement
	Kalluri, Raja Obul Reddy; Gugamsetty, Balakrishnaiah; Kotalo, Rama Gopal; Thotli, Lokeswara Reddy; Tandule, Chakradhar Rao; Akkiraju, Bhavyasree
通讯作者	Kotalo, RG
来源期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
EISSN	1873-2844
出版年	2020
卷号	240
英文摘要	To achieve an in-depth understanding of radiative forcing due to aerosols is a crucial challenge for climate change studies. The first-ever long-term measurement of direct shortwave composite and black carbon aerosol radiative properties over a semi-arid region, Anantapur, in southern India is presented. Long-term variations in Aerosol Optical Depth (AOD) and Black Carbon (BC) mass concentration from December 2007 to November 2017 are discussed with specific emphasis on intra-seasonal variation in aerosol optical properties, meteorology, transport pathways, and their implications for direct short wave radiative forcing over Anantapur. The intraseasonal mean AOD showed strong seasonal dependence with the highest (0.47 +/- 0.03) during summer and lowest (0.28 +/- 0.03) during the monsoon. Meanwhile, the intra-seasonal mean (+/- sigma) BC mass concentration was about 3.57 +/- 0.45, 2.60 +/- 0.58, 1.22 +/- 0.18 and 2.24 +/- 0.28 mu g m(-3) during winter, summer, monsoon and postmonsoon respectively. Furthermore, there is an obvious temporal variation in intra-seasonal BC mass concentration during the dry season (winter and summer). To be more specific, the intra-seasonal mean (+/- sigma) BC mass concentration before 2012 (after 2012) during the dry season was about 3.37 +/- 0.7 mu g m(-3 )(2.80 +/- 0.58 mu g m(-3)), respectively. Concentration weighted trajectory analyses (CWT) revealed that the air masses originated from the continental and polluted environments located in the central and northern parts of India (except monsoon), in regulating BC mass concentration over measurement location. Further, Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) derived aerosol vertical extinction profiles (532 nm) showed that majority aerosols (>250 Mm(-1)) are confined within 2 km from the surface during winter while in summer particles are distributed throughout the profile (similar to 6 km) with extinction coefficient varying between 200 and 250 Mm(-1). The Santa Barbara Discrete Ordinate Radiative Transfer (SBDART) model estimated intra-seasonal mean direct shortwave composite aerosol radiative forcing (DARE) in the atmosphere (ATM) was about 31.13 +/- 3.36, 34.82 +/- 3.89, 17.10 +/- 1.15, and 17.44 +/- 1.81 Wm(-2) during winter, summer, monsoon and post-monsoon, respectively. The positive signs of ATM forcing in all seasons indicate a warming of the atmosphere, and the corresponding heating rate was around a factor of two higher during the dry season (0.92 +/- 0.12 Kday(-1)) than the wet season (monsoon and post-monsoon) (0.49 +/- 0.04 Kday(-1)). The intra-seasonal mean BC forcing in ATM before 2012 (After 2012) during the dry season was about 24.14 +/- 2.85Wm(-2) (20.09 +/- 2.59Wm(-2)), respectively. The contribution of BC alone to the composite forcing during the study period over the station was similar to 68%. These findings would be helpful for regional climate studies and making air pollution control policy over the region.
英文关键词	Aerosols Radiative forcing Climate change Semi-arid region
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000569135400002
WOS关键词	OPTICAL-PROPERTIES ; SEASONAL-VARIATION ; TROPICAL URBAN ; GANGETIC PLAIN ; IN-SITU ; STATION ; IMPACT ; ABSORPTION ; ANANTAPUR ; DEPTH
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326277
作者单位	[Kalluri, Raja Obul Reddy; Gugamsetty, Balakrishnaiah; Kotalo, Rama Gopal; Thotli, Lokeswara Reddy; Tandule, Chakradhar Rao; Akkiraju, Bhavyasree] Sri Krishnadevaraya Univ, Aerosol & Atmospher Res Lab, Dept Phys, Anantapur 515003, Andhra Pradesh, India
推荐引用方式 GB/T 7714	Kalluri, Raja Obul Reddy,Gugamsetty, Balakrishnaiah,Kotalo, Rama Gopal,et al. Long-term (2008-2017) analysis of atmospheric composite aerosol and black carbon radiative forcing over a semi-arid region in southern India: Model results and ground measurement[J],2020,240.
APA	Kalluri, Raja Obul Reddy,Gugamsetty, Balakrishnaiah,Kotalo, Rama Gopal,Thotli, Lokeswara Reddy,Tandule, Chakradhar Rao,&Akkiraju, Bhavyasree.(2020).Long-term (2008-2017) analysis of atmospheric composite aerosol and black carbon radiative forcing over a semi-arid region in southern India: Model results and ground measurement.ATMOSPHERIC ENVIRONMENT,240.
MLA	Kalluri, Raja Obul Reddy,et al."Long-term (2008-2017) analysis of atmospheric composite aerosol and black carbon radiative forcing over a semi-arid region in southern India: Model results and ground measurement".ATMOSPHERIC ENVIRONMENT 240(2020).