期刊
JOURNAL OF GLACIOLOGY
卷 64, 期 245, 页码 349-361出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jog.2018.17
关键词
Antarctic glaciology; climate change; glacier mass balance; ice cap; mountain glaciers
资金
- Czech Science Foundation [GC16-14122J]
- Ministry of Education, Youth and Sports of the Czech Republic
- [LM2015078]
- [CZ.02.1.01/0.0/0.0/16_013/0001708]
Two small glaciers on James Ross Island, the north-eastern Antarctic Peninsula, experienced surface mass gain between 2009 and 2015 as revealed by field measurements. A positive cumulative surface mass balance of 0.57 +/- 0.67 and 0.11 +/- 0.37 m w.e. was observed during the 2009-2015 period on Whisky Glacier and Davies Dome, respectively. The results indicate a change from surface mass loss that prevailed in the region during the first decade of the 21st century to predominantly positive surface mass balance after 2009/10. The spatial pattern of annual surface mass-balance distribution implies snow redistribution by wind on both glaciers. The mean equilibrium line altitudes for Whisky Glacier (311 +/- 16 m a.s.l.) and Davies Dome (393 +/- 18m a.s.l.) are in accordance with the regional data indicating 200-300 m higher equilibrium line on James Ross and Vega Islands compared with the South Shetland Islands. The mean accumulation-area ratio of 0.68 +/- 0.09 and 0.44 +/- 0.09 determined for Whisky Glacier and Davies Dome, respectively, is similar to the value reported for Vega Island and within the range of typical values for high-latitude glaciers.
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