Light-absorbing impurities in a southern Tibetan Plateau glacier: Variations and potential impact on snow albedo and radiative forcing

doi:10.1016/j.atmosres.2017.10.002

	Light-absorbing impurities in a southern Tibetan Plateau glacier: Variations and potential impact on snow albedo and radiative forcing
	Li, XF (Li, Xiaofei)1,2; Kang, SC (Kang, Shichang)1,2,3; Zhang, GS (Zhang, Guoshuai)4; Qu, B (Qu, Bin)5; Tripathee, L (Tripathee, Lekhendra)1,6; Paudyal, R (Paudyal, Rukumesh)1,2,6; Jing, ZF (Jing, Zhefan)1; Zhang, YL (Zhang, Yulan)1; Yan, FP (Yan, Fangping)5; Li, G (Li, Gang)7
刊名	ATMOSPHERIC RESEARCH
	2018-02-01
卷号	200 期号:0 页码:77-87
关键词	NAM CO REGION BLACK-CARBON ZHADANG GLACIER ICE CORE MASS-BALANCE ATMOSPHERIC CIRCULATION IONIC CONCENTRATIONS ORGANIC-CARBON NO. 1 CHINA
ISSN号	0169-8095
DOI	10.1016/j.atmosres.2017.10.002
英文摘要	Light-absorbing impurities (LAIs), such as organic carbon (OC), black carbon (BC), and mineral dust (MD), deposited on the surface snow of glacier can reduce the surface albedo. As there exists insufficient knowledge to completely characterize LAIs variations and difference in LAIs distributions, it is essential to investigate the behaviors of LAIs and their influence on the glaciers across the Tibetan Plateau (TP). Therefore, surface snow and snowpit samples were collected during September 2014 to September 2015 from Zhadang (ZD) glacier in the southern TP to investigate the role of LAIs in the glacier. LAIs concentrations were observed to be higher in surface aged snow than in the fresh snow possibly due to post-depositional processes such as melting or sublimation. The LAIs concentrations showed a significant spatial distribution and marked negative relationship with elevation. Impurity concentrations varied significantly with depth in the vertical profile of the snowpit, with maximum LAIs concentrations frequently occurred in the distinct dust layers which were deposited in non monsoon, and the bottom of snowpit due to the eluviation in monsoon. Major ions in snowpit and backward trajectory analysis indicated that regional activities and South Asian emissions were the major sources. According to the SNow ICe Aerosol Radiative (SNICAR) model, the average simulated albedo caused by MD and BC in aged snow collected on 31 May 2015 accounts for about 13% +/- 3% and 46% +/- 2% of the albedo reduction. Furthermore, we also found that instantaneous RF caused by MD and BC in aged snow collected on 31 May 2015 varied between 4-16 W m(-2) and 7-64 W m(-2), respectively. The effect of BC exceeds that of MD on albedo reduction and instantaneous RF in the study area, indicating that BC played a major role on the surface of the ZD glacier.
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000416394400007
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8753]
专题	青藏高原研究所_图书馆
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 4.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China; 5.Lappeenranta Univ Technol, Lab Green Chem, Sammonkatu 12, FIN-50130 Mikkeli, Finland; 6.HERI, Kathmandu, Nepal; 7.China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reducing Ga, Lanzhou 730020, Gansu, Peoples R China.
推荐引用方式 GB/T 7714	Li, XF ,Kang, SC ,Zhang, GS ,et al. Light-absorbing impurities in a southern Tibetan Plateau glacier: Variations and potential impact on snow albedo and radiative forcing[J]. ATMOSPHERIC RESEARCH,2018,200(0):77-87.
APA	Li, XF .,Kang, SC .,Zhang, GS .,Qu, B .,Tripathee, L .,...&Li, CL .(2018).Light-absorbing impurities in a southern Tibetan Plateau glacier: Variations and potential impact on snow albedo and radiative forcing.ATMOSPHERIC RESEARCH,200(0),77-87.
MLA	Li, XF ,et al."Light-absorbing impurities in a southern Tibetan Plateau glacier: Variations and potential impact on snow albedo and radiative forcing".ATMOSPHERIC RESEARCH 200.0(2018):77-87.