Large‐Scale Seasonal Changes in Glacier Thickness Across High Mountain Asia
Large‐Scale Seasonal Changes in Glacier Thickness Across High Mountain Asia
复制标题
DOI：
10.1002/2017gl075300
复制
发表时间：
2017-10
影响因子：
5.2
通讯作者：
Qiuyu Wang;S. Yi;L. Chang;Wenke Sun
中科院分区：
文献类型：
--
作者：
Qiuyu Wang;S. Yi;L. Chang;Wenke Sun
最近，人们加大了对亚洲高山 (HMA) 冰川质量预算的估算力度。然而，尽管冰川释放的季节性融水是 HMA 当地重要的水资源，但人们对冰川的季节性变化知之甚少。利用卫星测高和重力测量数据，我们构建了冰川海拔的年度变化，并确定了冰川海拔变化季节性的两种一般模式。 HMA外围的冰川（喜马拉雅东部的冰川除外）大约在12月至4月至6月期间增厚，从而呈现出冬季和春季的积聚。青藏高原内陆地区，特别是西昆仑和唐古拉地区的冰川，大约在3月到8月左右积聚，呈现出春季和夏季的积聚。季节性冰川消融量是使用直接观测冰川变化的新方法获得的，而不是使用气候模型推断变化。
Recently, increased efforts have been made to estimate the mass budgets of glaciers in High Mountain Asia (HMA). However, seasonal changes in glaciers are poorly understood, despite the fact that seasonal meltwater released from glaciers is a crucial local water resource in HMA. Utilizing satellite altimetry and gravimetry data, we constructed annual changes in glacier elevation and identified two general patterns of the seasonality of glacier elevation changes. Glaciers in the periphery of HMA (except for those in the eastern Himalayas) thicken from approximately December to April–June, thus exhibiting winter and spring accumulation. Glaciers in the inner Tibetan Plateau, especially those in Western Kunlun and Tanggula, accumulate from approximately March to approximately August, thus exhibiting spring and summer accumulation. The amounts of seasonal glacier ablation were obtained using a new approach of direct observations of glacier changes, rather than inferring changes using a climate model.