干旱区生态环境知识资源中心(Arid): An assessment of the impact of Indian summer monsoon droughts on atmospheric aerosols and associated radiative forcing at a semi-arid station in peninsular India

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DOI	10.1016/j.scitotenv.2021.152683
	An assessment of the impact of Indian summer monsoon droughts on atmospheric aerosols and associated radiative forcing at a semi-arid station in peninsular India
	Kalluri, Raja Obul Reddy; Thotli, Lokeswara Reddy; Gugamsetty, Balakrishnaiah; Kotalo, Rama Gopal; Akkiraju, Bhavyasree; Virupakshappa, Usha Kajjer; Lingala, Siva Sankara Reddy
通讯作者	Kotalo, RG (corresponding author)，Sri Krishnadevaraya Univ, Dept Phys, Aerosol & Atmospher Res Lab, Anantapur 515003, Andhra Pradesh, India.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	813
英文摘要	A continuing increase in droughts/floods in Asian monsoon regions and worsening air quality due to aerosols are the two biggest threats to the health and well being of over 60% of the world's population. This study focuses on in-situ observations of atmospheric aerosols and their impact on shortwave direct aerosol radiative forcing (SDARF) during the southwest monsoon season (June-September) from 2015 to 2020 over a semi-arid station in Southern India. The Standardized precipitation index (SPI) is used to identify the droughts and normal monsoon years. Based on the SPI index, 2015, 2016, and 2018 were considered the drought monsoon years, while 2017, 2019, and 2020 were chosen as the normal monsoon years. During the drought monsoon years (normal monsoon years), the monthly mean black carbon (BC) was 1.17 +/- 0.25 (0.72 +/- 0.18), 1.02 +/- 0.31 (0.64 +/- 0.17), 1.02 +/- 0.38 (0.74 +/- 0.28), and 1.28 +/- 0.35 mu g/m(3) (0.88 +/- 0.21 mu g/m(3)), for June, July, August and September respectively. The lower BC concentration during the normal monsoon years is mainly due to the enhanced wet-removal rates by high rainfall over the measurement location. In July, there was a high ventilation coefficient (VC) and low concentration of BC, while in September, low VC, and a high concentration of BC was observed in both the drought and the normal monsoon years. In addition, a plane-parallel radiative transfer model was used to estimate shortwave direct aerosol radiative forcing for composite and without BC at various surfaces, including the surface (SUF), atmosphere (ATM), and top of the atmosphere (TOA). During the drought monsoon years (normal monsoon years), the estimated monthly ATM forcing was 17.6 +/- 2.4 (13.9 +/- 2.1), 17.5 +/- 7.5 (12.7 +/- 4.4), 17.2 +/- 4.0 (13.5 +/- 1.9), and 17.4 +/- 2.8 Wm(-2) (14.6 +/- 0.7 Wm(-2)) for June, July, August, and September, respectively. During the drought monsoon years, the estimated BC forcing was substantially larger (8.8 +/- 2.6 Wm(-2)) than that of normal monsoon years (6.0 +/- 1.5 Wm(-2)). It indicates the important role of absorbing BC aerosols during the drought monsoon years in introducing additional heat to the lower atmosphere, particularly over peninsular India.
英文关键词	Aerosol optical depth BC mass concentration Ventilation coefficient Radiative forcing Semi-arid region
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000743237800012
WOS关键词	BLACK CARBON AEROSOLS ; OPTICAL-PROPERTIES ; ABSORBING AEROSOLS ; INNER-MONGOLIA ; MIXING STATE ; ABSORPTION ; REGION ; CLIMATE ; AETHALOMETER ; VARIABILITY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376211
作者单位	[Kalluri, Raja Obul Reddy; Thotli, Lokeswara Reddy; Gugamsetty, Balakrishnaiah; Kotalo, Rama Gopal; Akkiraju, Bhavyasree; Virupakshappa, Usha Kajjer; Lingala, Siva Sankara Reddy] Sri Krishnadevaraya Univ, Dept Phys, Aerosol & Atmospher Res Lab, Anantapur 515003, Andhra Pradesh, India; [Virupakshappa, Usha Kajjer] Legislat Assembly MLA, Kalyandurg 515761, Andhra Pradesh, India
推荐引用方式 GB/T 7714	Kalluri, Raja Obul Reddy,Thotli, Lokeswara Reddy,Gugamsetty, Balakrishnaiah,et al. An assessment of the impact of Indian summer monsoon droughts on atmospheric aerosols and associated radiative forcing at a semi-arid station in peninsular India[J],2022,813.
APA	Kalluri, Raja Obul Reddy.,Thotli, Lokeswara Reddy.,Gugamsetty, Balakrishnaiah.,Kotalo, Rama Gopal.,Akkiraju, Bhavyasree.,...&Lingala, Siva Sankara Reddy.(2022).An assessment of the impact of Indian summer monsoon droughts on atmospheric aerosols and associated radiative forcing at a semi-arid station in peninsular India.SCIENCE OF THE TOTAL ENVIRONMENT,813.
MLA	Kalluri, Raja Obul Reddy,et al."An assessment of the impact of Indian summer monsoon droughts on atmospheric aerosols and associated radiative forcing at a semi-arid station in peninsular India".SCIENCE OF THE TOTAL ENVIRONMENT 813(2022).