气候变化领域集成服务门户(CCPortal): Simulations of black carbon (BC) aerosol impact over Hindu Kush Himalayan sites: Validation; sources; and implications on glacier runoff

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DOI	10.5194/acp-19-2441-2019
	Simulations of black carbon (BC) aerosol impact over Hindu Kush Himalayan sites: Validation; sources; and implications on glacier runoff
	Santra S.; Verma S.; Fujita K.; Chakraborty I.; Boucher O.; Takemura T.; Burkhart J.F.; Matt F.; Sharma M.
发表日期	2019
ISSN	16807316
起始页码	2441
结束页码	2460
卷号	19 期号:4
英文摘要	We estimated the black carbon (BC) concentration over the Hindu Kush Himalayan region (HKH), its impact on snow albedo reduction, and sensitivity on annual glacier runoff over the identified glaciers. These estimates were based on free-running aerosol simulations (freesimu) and constrained aerosol simulations (constrsimu) from an atmospheric general circulation model, combined with numerical simulations of a glacial mass balance model. BC concentration estimated from freesimu performed better over higher altitude (HA) HKH stations than that over lower altitude (LA) stations. The estimates from constrsimu mirrored the measurements well when implemented for LA stations. Estimates of the spatial distribution of BC concentration in the snowpack (BCc) over the HKH region led to identifying a hot-spot zone located around Manora Peak. Among glaciers over this zone, BCc (>60 μg kg-1) and BC-induced snow albedo reduction (≈5 %) were estimated explicitly being high during the pre-monsoon for Pindari, Poting, Chorabari, and Gangotri glaciers (which are major sources of fresh water for the Indian subcontinent). The rate of increase of BCc in recent years (i.e., over the period 1961-2010) was, however, estimated to be the highest for the Zemu Glacier. Sensitivity analysis with a glacial mass balance model indicated the increase in annual runoff from debris-free glacier areas due to BC-induced snow albedo reduction (SAR) corresponding to the BCc estimated for the HKH glaciers was 4 %-18 %, with the highest being for the Milam and Pindari glaciers. The rate of increase in annual glacier runoff per unit BC-induced percentage SAR was specifically high for Milam, Pindari, and Sankalpa glaciers. The source-specific contribution to atmospheric BC aerosols by emission sources led to identifying the potential emission source being primarily from the biofuel combustion in the Indo-Gangetic Plain south of 30°N, but also from open burning in a more remote region north of 30°N. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; albedo; black carbon; computer simulation; concentration (composition); glacier; runoff; Hindu Kush; India; Manora Peak; Siwalik Hills; Uttarakhand
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/144617
作者单位	Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India; Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Institut Pierre-Simon Laplace, Centre National de la Recherche Scientifique, Sorbonne Université, Paris, France; Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan; Department of Geosciences, University of Oslo, Oslo, Norway; Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India
推荐引用方式 GB/T 7714	Santra S.,Verma S.,Fujita K.,et al. Simulations of black carbon (BC) aerosol impact over Hindu Kush Himalayan sites: Validation; sources; and implications on glacier runoff[J],2019,19(4).
APA	Santra S..,Verma S..,Fujita K..,Chakraborty I..,Boucher O..,...&Sharma M..(2019).Simulations of black carbon (BC) aerosol impact over Hindu Kush Himalayan sites: Validation; sources; and implications on glacier runoff.Atmospheric Chemistry and Physics,19(4).
MLA	Santra S.,et al."Simulations of black carbon (BC) aerosol impact over Hindu Kush Himalayan sites: Validation; sources; and implications on glacier runoff".Atmospheric Chemistry and Physics 19.4(2019).