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RECENT MASS BALANCE RESULTS AND MORPHOLOGICAL EVOLUTION OF CARESER GLACIER (CENTRAL ALPS)

机译:最近的平衡平衡结果和Careser冰川的形态演变(中央阿尔卑斯山)

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摘要

This paper presents the 2002 to 2005 and historical mass balance series for Careser glacier. The mass balance evolution since 1967 has been compared with the meteorological data from the local weather stations. The most recent morphological changes of the ice body are also described. In the last four years the mass balance was extremely negative, with an average value of -2008 mm we and a minimum value of -3317 mm we. The current mass loss rate is nearly twice the average of the 1981 to 2001 (-1195 mm we), whereas between 1967 and 1980 the glacier was near equilibrium conditions. This behaviour seems to be strictly connected with the ablation season temperatures. By contrast, the relationship with the accumulation season precipitation amounts is less clear. The strongly negative mass balances result in huge morphological changes (surface lowering, bedrock emersion, rapid fragmentation) and positive feedbacks contribute to accelerate the deglaciation process. At the present-day climatic conditions, the complete extinction of the glacier has to be expected within few decades.
机译:本文介绍了Careser冰川的2002年至2005年以及历史质量平衡系列。自1967年以来的质量平衡演变已与当地气象站的气象数据进行了比较。还描述了冰体的最新形态变化。在过去的四年中,质量平衡极为不利,平均值为-2008毫米我们,最小值为-3317毫米我们。当前的质量损失率几乎是1981年至2001年(-1195毫米)的平均值的两倍,而1967年至1980年之间的冰川接近平衡状态。这种现象似乎与消融季节的温度严格相关。相反,与累积季节降水量的关系不太清楚。强烈的负质量平衡会导致巨大的形态变化(表面下降,基岩涌出,快速破碎),正反馈有助于加速冰消过程。在当今的气候条件下,必须在几十年内将冰川完全灭绝。

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