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Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice
Dou, TF (Dou, Tingfeng)1,2; Du, ZH (Du, Zhiheng)2; Li, ST (Li, Shutong)2; Zhang, YL (Zhang, Yulan)2; Zhang, Q (Zhang, Qi)4; Hao, MJ (Hao, Mingju)5; Li, CJ (Li, Chuanjin)2; Tian, B (Tian, Biao)4; Ding, MH (Ding, Minghu)4; Xiao, CD (Xiao, Cunde)2,3,4
Source PublicationCRYOSPHERE
2019
Volume13Issue:12Pages:3309-3316
DOI10.5194/tc-13-3309-2019
Abstract

The meltwater scavenging coefficient (MSC) of black carbon (BC) is a crucial parameter in snow and sea ice models, as it determines the BC enrichment in the surface layer of melting snow over sea ice and therefore modulates the BC-snow-albedo feedbacks. We present a new method for MSC estimation by sampling the melt-refreeze ice layer that is produced from refreezing of the meltwater within snowpack and its overlying snow and measuring their physical characteristics in Elson Lagoon northeast of Utqiagvik (formerly Barrow), Alaska, during the melting season. The bias of estimated MSC ranges from - 5.4 % to 7.3 %, which is not exactly dependent on the degree of ablation. The average MSC value calculated with this proposed method is slightly lower than that derived from the repeating sampling (RS) method in Elson Lagoon while still being within its best estimate range. Further estimation demonstrates that the MSC in the Canada Basin (23.6 % +/- 2.1 %) is close to that in Greenland (23.0 % +/- 12.5 %) and larger than that in the Chukchi Sea (17.9 % +/- 5.0 %) in the northwest of Utqiagyik. Elson Lagoon has the lowest MSC (14.5 % +/- 2.6 %) in the study areas. The method suggested in this study provides a possible approach for large-scale measurements of MSC over the sea ice area in the Arctic. Of course, this method depends on the presence of a melt-refreeze ice layer in the observation area.

Subject AreaGeosciences
WOS IDWOS:000502631100001
Language英语
Indexed BySCI
KeywordLight-absorbing Particles Snow Cover Variability Evolution Climate
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
Cooperation Status国内
ISSN1994-0416
Department环境变化与地表过程重点实验室
URL查看原文
PublisherBAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9065
Collection图书馆
Corresponding AuthorDou, TF (Dou, Tingfeng)
Affiliation1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China;
2.Chinese Acad Sci, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;
3.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China;
4.Chinese Acad Meteorol Sci, Inst Tibetan Plateau & Polar Meteorol, Beijing 100081, Peoples R China;
5.Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
Dou, TF ,Du, ZH ,Li, ST ,et al. Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice[J]. CRYOSPHERE,2019,13(12):3309-3316.
APA Dou, TF .,Du, ZH .,Li, ST .,Zhang, YL .,Zhang, Q .,...&Xiao, CD .(2019).Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice.CRYOSPHERE,13(12),3309-3316.
MLA Dou, TF ,et al."Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice".CRYOSPHERE 13.12(2019):3309-3316.
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