The surface accumulation and ablation of a coastal blue-ice area near Cap Prudhomme, Terre Adélie, Antarctica
The surface accumulation and ablation of a coastal blue-ice area near Cap Prudhomme, Terre Adélie, Antarctica
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DOI：
10.3189/002214307784409333
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发表时间：
2007
影响因子：
3.4
通讯作者：
C. Genthon;P. Lardeux;G. Krinner
中科院分区：
文献类型：
--
作者：
C. Genthon;P. Lardeux;G. Krinner
本文介绍并分析了南极Terre adaclie沿海蓝冰区47个桩网的积累和消融记录。这一记录涵盖了2004年初至2006年初的25次实地调查，其中包括一些在南方冬季进行的调查。这两个年份非常不同，2004年冬季地表物质平衡几乎为零，而2005年冬季地表物质积累很大。利用雪/冰能量和质量平衡模型再现了累积和消融记录。其中包括风对雪侵蚀的参数化。输入的气象学资料来自欧洲中期天气预报中心（ECMWF）的分析和预报，并使用自动气象站一年的本地气象观测资料进行校正。模型结果与观测结果相当吻合。风蚀是造成消融的最大因素，带走了大部分降水。升华和较小程度上的融化/径流共同占2年消融的约60 cm，主要在夏季。虽然记录很短，但它证实年际变率很高，因此对气象和气候具有很高的敏感性。监测和了解这些沿海蓝冰地区的物质平衡可能有助于监测和探测南极沿海地区的气候变化。
A record of accumulation and ablation from a network of 47 stakes at a coastal blue-ice area in Terre Adélie, Antarctica, is presented and analyzed. The record covers early 2004 to early 2006, from 25 field surveys including some in austral winter. The two years are very different, with a virtually null surface mass balance during the 2004 winter but large accumulation during the 2005 winter. A snow/ice energy- and mass-balance model is used to reproduce the accumulation and ablation record. A parameterization for snow erosion by wind is included. Input meteorology is from the European Centre for Medium-Range Weather Forecasts (ECMWF) analyses and forecasts, corrected using 1 year of local meteorological observations from an automatic weather station. Model results agree reasonably well with the observations. Wind erosion is the largest contributor to ablation, removing much of the precipitation. Sublimation and, to a lesser extent, melt/runoff together account for >60 cm w.e. of ablation in 2 years, mainly in summer. Although the record is short, it confirms high interannual variability and thus high sensitivity to meteorology and climate. Monitoring and understanding the mass balance of such coastal blue-ice areas may help monitor and detect climate change in the Antarctic coastal regions.