气候变化领域集成服务门户(CCPortal): Tropospheric warming over the northern Indian Ocean caused by South Asian anthropogenic aerosols: possible impact on the upper troposphere and lower stratosphere

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DOI	10.5194/acp-22-7179-2022
	Tropospheric warming over the northern Indian Ocean caused by South Asian anthropogenic aerosols: possible impact on the upper troposphere and lower stratosphere
	Fadnavis, Suvarna; Chavan, Prashant; Joshi, Akash; Sonbawne, Sunil M.; Acharya, Asutosh; Devara, Panuganti C. S.; Rap, Alexandru; Ploeger, Felix; Mueller, Rolf
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	7179
结束页码	7191
卷号	22 期号:11 页码:13
英文摘要	Atmospheric concentrations of South Asian anthropogenic aerosols and their transport play a key role in the regional hydrological cycle. Here, we use the ECHAM6-HAMMOZ chemistry-climate model to show the structure and implications of the transport pathways of these aerosols during spring (March-May). Our simulations indicate that large amounts of anthropogenic aerosols are transported from South Asia to the northern Indian Ocean and western Pacific. These aerosols are then lifted into the upper troposphere and lower stratosphere (UTLS) by the ascending branch of the Hadley circulation, where they enter the westerly jet. They are further transported to the Southern Hemisphere (similar to 15-30 degrees S) and downward (320-340 K) via westerly ducts over the tropical Atlantic (5 degrees S-5 degrees N, 10-40 degrees W) and Pacific (5 degrees S-5 degrees N, 95-140 degrees E). The carbonaceous aerosols are also transported to the Arctic, leading to local heating (0.08-0.3 K per month, an increase by 10 %-60 %). The presence of anthropogenic aerosols causes a negative radiative forcing (RF) at the top of the atmosphere (TOA) (-0.90 +/- 0.089 W m(-2)) and surface (-5.87 +/- 0.31 W m(-2)) and atmospheric warming (+4.96 +/- 0.24 W m(-2)) over South Asia (60-90 degrees E, 8-23 degrees N), except over the Indo-Gangetic Plain (75-83 degrees E, 23-30 degrees N), where RF at the TOA is positive (+1.27 +/- 0.16 W m(-2)) due to large concentrations of absorbing aerosols. The carbonaceous aerosols lead to in-atmospheric heating along the aerosol column extending from the boundary layer to the upper troposphere (0.1 to 0.4 K per month, increase by 4 %-60 %) and in the lower stratosphere at 40-90 degrees N (0.02 to 0.3 K per month, increase by 10 %-60 %). The increase in tropospheric heating due to aerosols results in an increase in water vapor concentrations, which are then transported from the northern Indian Ocean-western Pacific to the UTLS over 45-45 degrees N (increasing water vapor by 1 %-10 %).
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000805224600001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273115
作者单位	Ministry of Earth Sciences (MoES) - India; Indian Institute of Tropical Meteorology (IITM); Centre for Climate Change Research - India; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Kharagpur; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Bhubaneswar; University of Leeds; Helmholtz Association; Research Center Julich
推荐引用方式 GB/T 7714	Fadnavis, Suvarna,Chavan, Prashant,Joshi, Akash,et al. Tropospheric warming over the northern Indian Ocean caused by South Asian anthropogenic aerosols: possible impact on the upper troposphere and lower stratosphere[J],2022,22(11):13.
APA	Fadnavis, Suvarna.,Chavan, Prashant.,Joshi, Akash.,Sonbawne, Sunil M..,Acharya, Asutosh.,...&Mueller, Rolf.(2022).Tropospheric warming over the northern Indian Ocean caused by South Asian anthropogenic aerosols: possible impact on the upper troposphere and lower stratosphere.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(11),13.
MLA	Fadnavis, Suvarna,et al."Tropospheric warming over the northern Indian Ocean caused by South Asian anthropogenic aerosols: possible impact on the upper troposphere and lower stratosphere".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.11(2022):13.