Abstract

This study aims to quantify the areal variation of glacial lakes in the coastal ice-free areas of King George Island (KGI) and Nelson Island (NI) from 1986 to 2020. Glacial lake and glacial area fluctuations are estimated using spaceborne remote sensing data and annual mean near-surface air temperature data from station observations and ERA-Interim reanalysis were analyzed. The area of glacial lakes expanded 732%, from 0.18 km² in the 1980s to 1.39 km² in 2020. For the 1988–2000/2003 and 2000/2003–2020 periods, the increase in NI lake area is estimated to be 190% and 86%, respectively. Meanwhile, on KGI, the increase is estimated to be 316% for the 1988–2000/2003 period and 103% for the 2000/2003–2020 period. The majority of lakes and higher lake expansions occurred at the glacier fronts and can be attributed to the melting of glacier fronts and the subsequent glacial retreat in recent decades.

摘要

这项研究旨在量化1986年至2020年国王乔治岛（KGI）和尼尔森岛（NI）的沿海无冰区冰川湖的面积变化。冰川湖和冰川面积的波动可通过星载遥感数据和分析了来自台站观测和ERA-Interim再分析的年平均近地表气温数据。冰河湖面积从1980年代的0.18 km ²扩大到1.39 km ²，增长了732％。在2020年。在1988-2000 / 2003年和2000 / 2003-2020年期间，NI湖面积的增长估计分别为190％和86％。同时，在凯基证券上，1988-2000 / 2003年期间的增长率估计为316％，2000 / 2003-2020年期间的增长率为103％。大多数湖泊和较高的湖泊扩张发生在冰川前沿，这可归因于近几十年来冰川前沿的融化和随后的冰川退缩。