Is the decline of ice on Kilimanjaro unprecedented in the Holocene?
Is the decline of ice on Kilimanjaro unprecedented in the Holocene?
复制标题
乞力马扎罗山的冰层减少在全新世是前所未有的吗？
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
M. Winkler
中科院分区：
文献类型：
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作者：
G. Kaser;T. Mölg;N. Cullen;D. R. Hardy;M. Winkler
基利曼哈罗最高峰基博的冰川目前被认为是全新世的一个持续特征。在这里，我们综合了所有可用的测量，观察和我们对Kibo当前过程的理解-从过去十年的深入研究中获得-制定了关于这些冰原年龄的另一种假设。这表明Kibo高原上的平板状冰川的历史较短，不连续，冰的典型“生命周期”可能只持续几百年。如果生命周期重叠，它们可能是高原冰川中观察到的台阶的原因。因此，很可能在整个全新世，冰在基博的山顶高原上反复出现和消失。这种旋回性是由湖泊派生的代理记录支持的。
Glaciers on Kilimanjaro’s highest peak, Kibo, are currently regarded as a persistent feature of the Holocene. Here we synthesize all available measurements, observations, and our understanding of current processes on Kibo — gained from intensive research over the past decade — to formulate an alternative hypothesis about the age of these ice fields. This suggests a shorter, discontinuous history of the tabular-shaped glaciers on Kibo’s plateau, where typical ‘life cycles’ of the ice may last only a few hundred years. If life cycles overlap, they are likely the cause of the observed steps in the plateau glaciers. Thus, it is likely that ice has come and gone repeatedly on Kibo’s summit plateau, throughout the Holocene. Such a cyclicity is supported by lake-derived proxy records.