TY - JOUR

T1 - Retention time of lakes in the Larsemann Hills oasis, East Antarctica

AU - Shevnina, Elena

AU - Kourzeneva, Ekaterina

AU - Dvornikov, Yury

AU - Fedorova, Irina

N1 - Publisher Copyright: © 2021 Copernicus GmbH. All rights reserved.

PY - 2021/6/14

Y1 - 2021/6/14

N2 - 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.

AB - 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.

KW - FRESH-WATER

KW - CLIMATE-CHANGE

KW - BALANCE

KW - SALINITY

KW - UNTERSEE

KW - FEATURES

KW - STATION

KW - SURFACE

KW - ENERGY

KW - MODEL

UR - http://www.scopus.com/inward/record.url?scp=85108085337&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/d7b3b2e2-64eb-377e-b0d3-0fc4d0ebb5e0/

U2 - 10.5194/tc-15-2667-2021

DO - 10.5194/tc-15-2667-2021

M3 - Article

AN - SCOPUS:85108085337

VL - 15

SP - 2667

EP - 2682

JO - Cryosphere

JF - Cryosphere

SN - 1994-0416

IS - 6

ER -