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Light-absorbing impurities enhance glacier albedo reduction in the southeastern Tibetan plateau
Zhang, YL (Zhang, Yulan)1; Kang, SC (Kang, Shichang)1,2; Cong, ZY (Cong, Zhiyuan)2,3; Schmale, J (Schmale, Julia)4; Sprenger, M (Sprenger, Michael)5; Li, CL (Li, Chaoliu)2,3; Yang, W (Yang, Wei)2,3; Gao, TG (Gao, Tanguang)6; Sillanpaa, M (Sillanpaa, Mika)7,8; Li, XF (Li, Xiaofei)1; Liu, YJ (Liu, Yajun)1; Chen, PF (Chen, Pengfei)3; Zhang, XL (Zhang, Xuelei)9; Kang, SC
AbstractLight-absorbing impurities (LAIs) in snow of the southeastern Tibetan Plateau (TP) and their climatic impacts are of interest not only because this region borders areas affected by the South Asian atmospheric brown clouds but also because the seasonal snow and glacier melt from this region form important headwaters of large rivers. In this study, we collected surface snow and snowpit samples from four glaciers in the southeastern TP in June 2015 to investigate the comprehensive observational data set of LAIs. Results showed that the LAI concentrations were much higher in the aged snow and granular ice than in the fresh snow and snowpits due to postdepositional processes. Impurity concentrations fluctuated across snowpits, with maximum LAI concentrations frequently occurring toward the bottom of snowpits. Based on the SNow ICe Aerosol Radiative model, the albedo simulation indicated that black carbon and dust account for approximately 20% of the albedo reduction relative to clean snow. The radiative forcing caused by black carbon and dust deposition on the glaciers were between 1.0-141 W m(-2) and 1.5-120 W m(-2), respectively. Black carbon (BC) played a larger role in albedo reduction and radiative forcing than dust in the study area, enhancing approximately 15% of glacier melt. Analysis based on the Fire INventory from NCAR indicated that nonbiomass-burning sources of BC played an important role in the total BC deposition, especially during the monsoon season. This study suggests that eliminating anthropogenic BC could mitigate glacier melt in the future of the southeastern TP.
Plain Language Summary In this study, we focused on light-absorbing impurities (LAIs), including black carbon, organic carbon, and mineral dust in glacial surface snow from southeaster Tibetan glaciers. This study showed the concentrations of LAIs, and estimated their impact on albedo reduction. Furthermore, we discussed the potential source of impurities and their impact to the study area. These results provide scientific basis for regional mitigation efforts to reduce black carbon.
Subject Area自然地理学
WOS IDWOS:000407900300013
Indexed BySCI
KeywordAtmospheric Dust Deposition Black Carbon Brown Carbon Elemental Carbon Himalayan Glaciers Algal Community Ice Core Snow Aerosols Absorption
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
Cooperation Status国际
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Document Type期刊论文
Corresponding AuthorKang, SC
Affiliation1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Gansu, Peoples R China.
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China.
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China.
4.Paul Scherrer Inst, Villigen, Switzerland.
5.Swiss Fed Inst Technol, Inst Atmospher & Climate Sci, Zurich, Switzerland.
6.Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou, Gansu, Peoples R China.
7.Lappeenranta Univ Technol, Lab Green Chem, Mikkeli, Finland.
8.Florida Int Univ, Dept Civil & Environm Engn, Miami, FL 33199 USA.
9.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Wetland Ecol & Environm, Changchun, Jilin, Peoples R China.
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GB/T 7714
Zhang, YL ,Kang, SC ,Cong, ZY ,et al. Light-absorbing impurities enhance glacier albedo reduction in the southeastern Tibetan plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(13):6915-6933.
APA Zhang, YL .,Kang, SC .,Cong, ZY .,Schmale, J .,Sprenger, M .,...&Kang, SC.(2017).Light-absorbing impurities enhance glacier albedo reduction in the southeastern Tibetan plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(13),6915-6933.
MLA Zhang, YL ,et al."Light-absorbing impurities enhance glacier albedo reduction in the southeastern Tibetan plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.13(2017):6915-6933.
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