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	Concentrations and source regions of light-absorbing particles in snow/ice in northern Pakistan and their impact on snow albedo
	Gul, Chaman1,2,3; Puppala, Siva Praveen2; Kang, Shichang1,3,4; Adhikary, Bhupesh2; Zhang, Yulan1; Ali, Shaukat5; Li, Yang3; Li, Xiaofei1
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2018-04-12
卷号	18期号:7页码:4981-5000
ISSN号	1680-7316
DOI	10.5194/acp-18-4981-2018
通讯作者	Gul, Chaman(chaman.gul@icimod.org) ; Puppala, Siva Praveen(sivapraveen.puppala@icimod.org) ; Kang, Shichang(shichang.kang@lzb.ac.cn)
英文摘要	Black carbon (BC), water-insoluble organic carbon (OC), and mineral dust are important particles in snow and ice which significantly reduce albedo and accelerate melting. Surface snow and ice samples were collected from the Karakoram-Himalayan region of northern Pakistan during 2015 and 2016 in summer (six glaciers), autumn (two glaciers), and winter (six mountain valleys). The average BC concentration overall was 2130 +/- 1560 ng g(-1) in summer samples, 2883 +/- 3439 ng g(-1) in autumn samples, and 992 +/- 883 ng g(-1) in winter samples. The average waterinsoluble OC concentration overall was 1839 +/- 1108 ng g(-1) in summer samples, 1423 +/- 208 ng g(-1) in autumn samples, and 1342 +/- 672 ng g(-1) in winter samples. The overall concentration of BC, OC, and dust in aged snow samples collected during the summer campaign was higher than the concentration in ice samples. The values are relatively high compared to reports by others for the Himalayas and the Tibetan Plateau. This is probably the result of taking more representative samples at lower elevation where deposition is higher and the effects of ageing and enrichment are more marked. A reduction in snow albedo of 0.1-8.3% for fresh snow and 0.9-32.5% for aged snow was calculated for selected solar zenith angles during daytime using the Snow, Ice, and Aerosol Radiation (SNICAR) model. The daily mean albedo was reduced by 0.07-12.0 %. The calculated radiative forcing ranged from 0.16 to 43.45 W m(-2) depending on snow type, solar zenith angle, and location. The potential source regions of the deposited pollutants were identified using spatial variance in wind vector maps, emission inventories coupled with backward air trajectories, and simple region-tagged chemical transport modeling. Central, south, and west Asia were the major sources of pollutants during the sampling months, with only a small contribution from east Asia. Analysis based on the Weather Research and Forecasting (WRF-STEM) chemical transport model identified a significant contribution (more than 70 %) from south Asia at selected sites. Research into the presence and effect of pollutants in the glaciated areas of Pakistan is economically significant because the surface water resources in the country mainly depend on the rivers (the Indus and its tributaries) that flow from this glaciated area.
收录类别	SCI
WOS关键词	BLACK CARBON DEPOSITION ; CENTRAL TIBETAN PLATEAU ; OPTICAL-PROPERTIES ; ZHADANG GLACIER ; ORGANIC-CARBON ; CLIMATE MODELS ; ICE CORE ; AEROSOLS ; IMPURITIES ; ABSORPTION
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000429817300001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558134
专题	寒区旱区环境与工程研究所
通讯作者	Gul, Chaman; Puppala, Siva Praveen; Kang, Shichang
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryosphere Sci, Lanzhou 73000, Gansu, Peoples R China 2.Int Ctr Integrated Mt Dev ICIMOD, GPO Box 3226, Kathmandu, Nepal 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 5.Global Change Impact Studies Ctr GCISC, Minist Climate Change, Islamabad, Pakistan
推荐引用方式 GB/T 7714	Gul, Chaman,Puppala, Siva Praveen,Kang, Shichang,et al. Concentrations and source regions of light-absorbing particles in snow/ice in northern Pakistan and their impact on snow albedo[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(7):4981-5000.
APA	Gul, Chaman.,Puppala, Siva Praveen.,Kang, Shichang.,Adhikary, Bhupesh.,Zhang, Yulan.,...&Li, Xiaofei.(2018).Concentrations and source regions of light-absorbing particles in snow/ice in northern Pakistan and their impact on snow albedo.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(7),4981-5000.
MLA	Gul, Chaman,et al."Concentrations and source regions of light-absorbing particles in snow/ice in northern Pakistan and their impact on snow albedo".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.7(2018):4981-5000.

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