Spatially heterogeneous wastage of Himalayan glaciers
Spatially heterogeneous wastage of Himalayan glaciers
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DOI：
10.1073/pnas.1106242108
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发表时间：
2011-08-23
影响因子：
11.1
通讯作者：
Nuimura, Takayuki
中科院分区：
文献类型：
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作者：
Fujita, Koji;Nuimura, Takayuki
我们描述了尼泊尔喜马拉雅山脉的三个基准冰川的体积变化，这些冰川自20世纪70年代以来一直在进行观测。与全球冰川物质平衡平均值相比，喜马拉雅冰川在20世纪70 ~ 90年代表现出快速的消融，但在近10年也表现出类似的消融。近10年，干旱气候条件下的一个冰川与70 ~ 90年代相比呈现负物质平衡，但受到抑制，而湿润气候条件下的两个冰川则呈现加速损耗。采用缩小比例的网格数据集的质量平衡模型描述了观测到的冰川的命运。我们还显示，即使在当今气候变暖的情况下，亚洲高原冰川流失的空间分布也不均匀。
We describe volumetric changes in three benchmark glaciers in the Nepal Himalayas on which observations have been made since the 1970s. Compared with the global mean of glacier mass balance, the Himalayan glaciers showed rapid wastage in the 1970s-1990s, but similar wastage in the last decade. In the last decade, a glacier in an arid climate showed negative but suppressed mass balance compared with the period 1970s-1990s, whereas two glaciers in a humid climate showed accelerated wastage. A mass balance model with downscaled gridded datasets depicts the fate of the observed glaciers. We also show a spatially heterogeneous distribution of glacier wastage in the Asian highlands, even under the present-day climate warming.