Energy and mass balance characteristics of the Guliya ice cap in the West Kunlun Mountains, Tibetan Plateau
Energy and mass balance characteristics of the Guliya ice cap in the West Kunlun Mountains, Tibetan Plateau
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青藏高原西昆仑山古里雅冰盖能量与质量平衡特征
DOI：
10.1016/j.coldregions.2018.12.001
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发表时间：
2019-03
影响因子：
4.1
通讯作者：
Zhu Meilin
中科院分区：
文献类型：
--
作者：
Li Shenghai;Yao T;ong;Yu Wusheng;Yang Wei;Zhu Meilin
基于2015/ 2016年WKM古里雅冰盖的冰川气象条件和物质平衡观测资料，应用分布式能量和物质平衡模型，研究了古里雅冰盖能量和物质平衡的时空变化特征，以及物质平衡对气候变化的响应。模拟结果表明，与20世纪80年代观测到的正质量平衡的WKM崇泽冰川相比，GIC的质量损失较小，年损失为- 0.193 ± 0.042 m水当量，平衡线高度上升了约70 m，位于6000 ± 19 m。此外，在整个观测期内，净短波辐射提供的入射能量几乎与净长波辐射损失的能量相平衡，表面烧蚀的大部分能量通过升华被潜热通量消耗，这成为GIC上能量平衡的一个重要特征。利用综合气候情景改变模式输入数据的敏感性实验（从气象测量中取样并考虑耦合气候变量扰动）表明，GIC的质量平衡对湿度相关变量的变化比温度的变化更敏感。与2015/ 16年观测到的情况相比，只有年降水量显著增加、气温显著下降的情况下才会出现正质量平衡。
Glacier surface ablation and associated energy characteristics are important to glacier survival, but little is known about these on glaciers in the West Kunlun Mountains (WKM), Tibetan Plateau, mainly due to their inaccessibility. Based on the glacio-meteorological conditions and mass balance observations on the Guliya ice cap (GIC) in the WKM during 2015/’16, a distributed energy and mass balance model was applied to study the spatiotemporal variations of energy and mass balance on the GIC, and the response of mass balance to climate change. Modeled results revealed that compared to the Chongce glacier in the WKM which was observed to undergo a positive mass balance in the 1980s, the GIC suffered a small mass loss with an annual value of −0.193 ± 0.042 m water equivalent, and the equilibrium-line altitude has risen by approximately 70 m to locate at 6000 ± 19 m. Besides, over the entire observation period, the incoming energy supplied by net shortwave radiation was almost balanced by the energy loss through net longwave radiation, and most energy available for surface ablation was consumed by latent heat flux through sublimation, which became a significant feature of the energy balance on the GIC. Sensitivity experiments by changing model input data with synthetic climate scenarios, which were sampled from meteorological measurements and accounted for coupled climate variable perturbations, revealed that the mass balance of the GIC was more sensitive to the changes in moisture-related variables than that in temperature, and positive mass balance would only be given from scenarios with significantly increased annual precipitation and decreased air temperature compared to those observed in 2015/’16.
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青藏高原七一冰川消融季积聚区地表能量与质量平衡分析
影响因子：
2.8
作者：
Wu Xuejiao;He Jianqiao;Jiang Xi;Wang Ninglian
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影响因子：
2.5
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DOI：
10.5194/tc-7-1205-2013
发表时间：
2012-12
期刊：
The Cryosphere
影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
4.6
作者：
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通讯作者：
Xiaojun Wang