DOI: 10.5194/tc-15-2667-2021
论文题名: Retention time of lakes in the Larsemann Hills oasis, East Antarctica
作者: Shevnina E. ; Kourzeneva E. ; Dvornikov Y. ; Fedorova I.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 6 起始页码: 2667
结束页码: 2682
语种: 英语
英文关键词: lake water
; oasis
; outflow
; water budget
; water exchange
; water retention
; Antarctica
; East Antarctica
; France
; Lake Reid
; Larsemann Hills
; Occitanie
; Tarn
; Varanidae
英文摘要: This study provides first estimates of the water transport timescale for five lakes located in the Larsemann Hills oasis (69°&tild;23′S,76°&tild;20′E) in East Antarctica. We estimated lake retention time (LRT) as a ratio of lake volume to the inflow and outflow terms of a lake water balance equation. The LRT was evaluated for lakes of epiglacial and landlocked types, and it was assumed that these lakes are monomictic, with water exchange occurring during the warm season only. We used hydrological observations collected in four seasonal field campaigns to evaluate the LRT. For the epiglacial lakes Progress and Nella/Scandrett, the LRT was estimated at 12-13 and 4-5 years, respectively. For the landlocked lakes Stepped, Sarah Tarn and Reid, our results show a great difference in the LRT calculated from the outflow and inflow terms of the water balance equation. The LRTs for these lakes vary depending on the methods and errors inherent to them. We relied on the estimations from the outflow terms, since they are based on hydrological measurements with better quality. Lake Stepped exchanged water within 1.5 years. Sarah Tarn and Lake Reid are endorheic ponds, with water loss mainly through evaporation. Their LRTs were estimated as 21-22 and 8-9 years, respectively. To improve the LRT estimates, special hydrological observations are needed to monitor the lakes and streams during the warm season with a uniform observational programme. © 2021 Copernicus GmbH. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164805
Appears in Collections: 气候变化与战略
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作者单位: Finnish Meteorological Institute, Helsinki, Finland; Department of Landscape Design and Sustainable Ecosystems, Agrarian and Technological Institute, RUDN University, Moscow, Russian Federation; Department of Geo-Ecology and Environmental Management, Saint Petersburg State University, St Petersburg, Russian Federation
Recommended Citation:
Shevnina E.,Kourzeneva E.,Dvornikov Y.,et al. Retention time of lakes in the Larsemann Hills oasis, East Antarctica[J]. Cryosphere,2021-01-01,15(6)