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DOI	10.5194/tc-13-3309-2019
	Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice
	Dou T.; Du Z.; Li S.; Zhang Y.; Zhang Q.; Hao M.; Li C.; Tian B.; Ding M.; Xiao C.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	3309
结束页码	3316
卷号	13 期号:12
英文摘要	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 Utqiaġvik (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 Utqiaġvik. 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. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
学科领域	black carbon; meltwater; sampling; scavenging (chemistry); sea ice; snowpack; surface layer; Alaska; Arctic; Arctic Ocean; Barrow; Canada Basin; Chukchi Sea; Elson Lagoon; Greenland; United States
语种	英语
scopus关键词	black carbon; meltwater; sampling; scavenging (chemistry); sea ice; snowpack; surface layer; Alaska; Arctic; Arctic Ocean; Barrow; Canada Basin; Chukchi Sea; Elson Lagoon; Greenland; United States
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118795
作者单位	College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory of Cryospheric Science, Chinese Academy of Sciences, Lanzhou, 730000, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100875, China; Institute of Tibetan Plateau and Polar Meteorology, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, 100084, China
推荐引用方式 GB/T 7714	Dou T.,Du Z.,Li S.,et al. Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice[J],2019,13(12).
APA	Dou T..,Du Z..,Li S..,Zhang Y..,Zhang Q..,...&Xiao C..(2019).Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice.The Cryosphere,13(12).
MLA	Dou T.,et al."Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice".The Cryosphere 13.12(2019).