Response of Xiao Dongkemadi Glacier in the central Tibetan Plateau to the current climate change and future scenarios by 2050

Response of Xiao Dongkemadi Glacier in the central Tibetan Plateau to the current climate change and future scenarios by 2050
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青藏高原中部小东克玛地冰川对当前气候变化及2050年未来情景的响应

DOI:
10.1007/s11629-015-3609-4
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发表时间:
2016-01
影响因子:
2.5
通讯作者:
Sun Jian-yong
Sun Jian-yong
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Shi Pei-hong;Duan Ke-qin;Liu Huan-cai;Yang Jun-hua;Zhang Xiao;Sun Jian-yong

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青藏高原(TP)在中纬度拥有一万座高山冰川。最近,随着撤退速度的加快,它们已经缩水。应用Regine Hock建立的分布式温度-指数质量平衡模型,结合体积-面积标度法,对青藏高原中部的小东克马迪冰川(XDG)的气候变化响应进行了研究。结果表明,在-2012年期间,模拟的质量平衡与观测值(R2=0.75p<0.001)吻合较好。模拟的年平均质量平衡(-213 mm W.E.)与观测值(西经-233毫米)接近,表明该模型可用于未来冰川变化的估算。然后根据2013-2050年RCP4.5和RCP8.5两种气候情景下RegCM4的输出,强制建立模型。模拟的冰川末端高程将从5454米/秒升至5454米/秒。2013年增加到5533万(RCP4.5)和5543平方公尺(RCP8.5)在2050年。XDG在1989-2050年期间将以600-700m3a-1的速度流失,表明融水将增加河流径流。但从长远来看,随着冰川规模的缩小,对河流径流的贡献将会减小。
The Tibetan Plateau (TP) holds ten thousands of alpine glaciers in mid-latitude. They have shrunk with an accelerating retreat rate recently. We applied a distributed temperature-index massbalance model developed by Regine Hock, and coupled with a volume-area scaling method to Xiao Dongkemadi Glacier (XDG) in the central TP, to assess its response to climate change. The result shows the simulated mass balance is in a good agreement with observations (R2=0.75,p<0.001) during the period of 1989-2012. The simulated mean annual mass balance (-213 mm w.e.) is close to the observation (-233 mm w.e.), indicating the model can be used to estimate the glacier variation in the future. Then the model was forced by the output of RegCM4 under the climate scenarios RCP4.5 and RCP8.5 from 2013 to 2050. The simulated terminus elevation of the glacier will rise from 5454 m a.s.l. in 2013 to 5533 m a.s.l. (RCP4.5) and 5543 m a.s.l. (RCP8.5) in 2050. XDG will lose its volume with an increasing rate of 600-700 m3a-1 during the period of 1989-2050, indicating the melting water will enhance the river runoff. But for the long term, the contribution to the river runoff will decrease for the shrinkage of glacier scale.
对 1955 年至 2008 年中国青藏高原中部一个小流域的径流和冰川质量平衡进行建模
DOI: 10.1002/hyp.8256
发表时间: 2012-05-30
影响因子: 3.2
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