globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.atmosres.2017.10.002
Scopus记录号: 2-s2.0-85033609267
论文题名:
Light-absorbing impurities in a southern Tibetan Plateau glacier: Variations and potential impact on snow albedo and radiative forcing
作者: Li X.; Kang S.; Zhang G.; Qu B.; Tripathee L.; Paudyal R.; Jing Z.; Zhang Y.; Yan F.; Li G.; Cui X.; Xu R.; Hu Z.; Li C.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 200
起始页码: 77
结束页码: 87
语种: 英语
英文关键词: Albedo reduction ; Glacier melting ; Light-absorbing impurities ; Radiative forcing ; Tibetan Plateau
Scopus关键词: Atmospheric radiation ; Atmospheric thermodynamics ; Cerium compounds ; Dust ; Impurities ; Melting ; Organic carbon ; Solar radiation ; Albedo reduction ; Backward trajectory analysis ; Depositional process ; Glacier melting ; Impurity concentration ; Potential impacts ; Radiative forcings ; Tibetan Plateau ; Snow ; albedo ; glacier ; melting ; organic carbon ; radiative forcing ; China ; Qinghai-Xizang Plateau
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. © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109006
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; Laboratory of Green Chemistry, Lappeenranta University of Technology, Sammonkatu 12, Mikkeli, FIN-50130, Finland; Himalayan Environment Research Institute (HERI), Kathmandu, Nepal; Key Laboratory of Arid Climatic Change and Disaster Reducing of Gansu Province, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, 730020, China

Recommended Citation:
Li X.,Kang S.,Zhang G.,et al. Light-absorbing impurities in a southern Tibetan Plateau glacier: Variations and potential impact on snow albedo and radiative forcing[J]. Atmospheric Research,2018-01-01,200
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