High snow accumulation on Amundsen Sea coastal ice rise, West Antarctica

IF 0.9 4区 地球科学 Q4 ECOLOGY
West Antarctica
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引用次数: 0

Abstract

: Polar snow and its accumulation preserve valuable information derived from the atmosphere on past climate and environmental changes in high resolution, particularly in coastal sites. A 2.5-m snow-pit was excavated from the coastal ice rise (Moore Dome) near Amundsen Sea region in February 2012. This study evaluated the isotopic and chemical compositions in the snow-pit and compared them with meteorological variables. Based on the seasonal peaks of the MSA and nssSO 42– together with  18 O,  D, and d-excess, the snow-pit record was corresponded to accumulation during austral winter 2011 to summer 2011/2012. The annual mean accumulation rate was assumed thus to be as large as or even higher than 1.03 m w.e. yr –1 at this site. A relatively warm winter temperature in 2011 was traceable in the variations of  18 O,  D, and d-excess. This study emphasizes the importance of the high snow accumulation observed at this site in providing valuable information on sub-annual variations in climate and environmental changes through the study of longer ice cores.
南极洲西部阿蒙森海沿岸冰隆起处的高积雪
极地雪及其积累以高分辨率保存了来自大气的关于过去气候和环境变化的宝贵信息,特别是在沿海地区。2012年2月,在阿蒙森海附近的沿海冰隆起(摩尔穹窿)挖掘了一个2.5米的雪坑。本研究评估了雪坑中的同位素和化学成分,并与气象变量进行了比较。基于MSA和nssSO 42 -的季节峰值,以及 18 O、 D和D -excess,雪坑记录对应于2011年冬季至2011/2012年夏季的累积。因此,假定该地点的年平均积累速率等于甚至高于1.03 m w.e.r。2011年冬季气温相对偏暖的特征可追溯于该地区的 18 O、 18 D和D -excess的变化。这项研究强调了在该站点观测到的高积雪量的重要性,通过对更长的冰芯的研究,为气候和环境变化的次年变化提供了有价值的信息。
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来源期刊
Polish Polar Research
Polish Polar Research ECOLOGY-GEOSCIENCES, MULTIDISCIPLINARY
CiteScore
2.00
自引率
7.70%
发文量
0
审稿时长
>12 weeks
期刊介绍: The quarterly Polish Polar Research edited by the Committee on Polar Research of the Polish Academy of Sciences is an international journal publishing original research articles presenting the results of studies carried out in polar regions. All papers are peer-reviewed and published in English. The Editorial Advisory Board includes renowned scientist from Poland and from abroad.
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