干旱区生态环境知识资源中心(Arid): Evaporation over a glacial lake in Antarctica

Arid

DOI	10.5194/tc-16-3101-2022
	Evaporation over a glacial lake in Antarctica
	Shevnina, Elena; Potes, Miguel; Vihma, Timo; Naakka, Tuomas; Dhote, Pankaj Ramji; Thakur, Praveen Kumar
通讯作者	Shevnina, E
来源期刊	CRYOSPHERE
ISSN	1994-0416
EISSN	1994-0424
出版年	2022
卷号	16 期号:8 页码:3101-3121
英文摘要	The study provides estimates of summertime evaporation over a glacial lake located in the Schirmacher oasis, Dronning Maud Land, East Antarctica. Lake Zub (alternately named Lake Priyadarshini and referred to throughout as Lake Zub/Priyadarshini) is the second-largest lake in the oasis, and its maximum depth is 6 m. The lake is also among the warmest glacial lakes in the oasis, and it is free of ice during almost 2 summer months. The summertime evaporation over the ice-free lake was measured using the eddy covariance method and estimated on the basis of five indirect methods (bulk-aerodynamic method and four combination equations). We used meteorological and hydrological measurements collected during a field experiment carried out in 2018. The eddy covariance method was considered the most accurate, and the evaporation was estimated to be 114 mm for the period from 1 January to 7 February 2018 (38 d) on the basis of this method. The average daily evaporation was 3.0 mm d(-1) in January 2018. During the experiment period, the largest changes in daily evaporation were driven by synoptic-scale atmospheric processes rather than local katabatic winds. The bulk-aerodynamic method suggests the average daily evaporation is 2.0 mm d(-1), which is 32% less than the results based on the eddy covariance method. The bulk-aerodynamic method is much better in producing the day-to-day variations in evaporation compared to the combination equations. All selected combination equations underestimated the evaporation over the lake by 40 %-72 %. The scope of the uncertainties inherent in the indirect methods does not allow us to apply them to estimate the daily evaporation over Lake Zub/Priyadarshini. We suggested a new combination equation to evaluate the summertime evaporation over the lake's surface using meteorological observations from the nearest site. The performance of the new equation is better than the performance of the indirect methods considered. With this equation, the evaporation over the period of the experiment was 124 mm, which is only 9% larger than the result according to the eddy covariance method.
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000834936300001
WOS关键词	SURFACE-ENERGY BALANCE ; SCHIRMACHER OASIS ; EDDY-CORRELATION ; LARSEMANN HILLS ; ICE SHELF ; WATER ; FLUX ; MODEL ; RESERVOIR ; BUDGET
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392202
推荐引用方式 GB/T 7714	Shevnina, Elena,Potes, Miguel,Vihma, Timo,et al. Evaporation over a glacial lake in Antarctica[J],2022,16(8):3101-3121.
APA	Shevnina, Elena,Potes, Miguel,Vihma, Timo,Naakka, Tuomas,Dhote, Pankaj Ramji,&Thakur, Praveen Kumar.(2022).Evaporation over a glacial lake in Antarctica.CRYOSPHERE,16(8),3101-3121.
MLA	Shevnina, Elena,et al."Evaporation over a glacial lake in Antarctica".CRYOSPHERE 16.8(2022):3101-3121.