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地球科学进展  2011, Vol. 26 Issue (4): 409-416    DOI: 10.11867/j.issn.1001-8166.2011.04.0409
研究论文     
两类度日模型在天山科其喀尔巴西冰川消融估算中的应用
卿文武1,3,陈仁升1,2,刘时银3,韩海东2,王建2
1. 中国科学院寒区旱区环境与工程研究所黑河上游生态—水文试验研究站,甘肃兰州730000;2. 中国科学院内陆河流域生态水文重点实验室,甘肃兰州730000;3. 冰冻圈科学国家重点实验室,甘肃兰州730000
Research and Application of Two Kinds of Temperature index Model on the Koxkar Glacier
Qing Wenwu1,3,Chen Rensheng1,2,Liu Shiyin3,Han Haidong2, Wang Jian2
1.Heihe Upstream Watershed EcologyHydrology Experimental Research Station, CAREERI, CAS, Lanzhou730000, China; 2. Heihe Key Laboratory of Ecohydrology and Integrated River Basin Science, CAREERI, CAS, Lanzhou730000, China; 3. State Key Laboratory of Cryospheric Science, Lanzhou730000,China
 全文: PDF(1912 KB)  
摘要:

采用辐射传输参数化方案估算太阳入射短波辐射,并以小时气温作为输入数据,在200、100和50 m3种海拔梯度下,分别应用传统度日模型和改进度日模型对科其喀尔巴西冰川2008年夏季消融区非表碛覆盖区消融进行了模拟分析。研究表明:太阳小时入射总辐射计算与实测结果具有较好的一致性;科其喀尔巴西冰川度日因子存在明显的时空差异性;随着空间分辨率提高,2类度日模型的模拟效果都变好;在200和100 m海拔梯度下,改进度日模型的模拟结果优于传统度日模型,而在50 m海拔梯度下,无明显改进。

关键词: 山地冰川传统度日模型改进度日模型消融估算等高距    
Abstract:

A contrastive study of the classical degree-day model and the enhanced temperature-index model, incorporating the hourly global radiation, were present on Koxkar Glacier, a mountain glacier on the south slopes of the Tianshan Mountains, in the summer, 2008. The two models were run with three different spatial resolutions of 200 m, 100 m and 50 m contour interval, to test their applicability to glacial ablation with low data requirement. Hourly solar radiation was estimated by using parameterizing transfer theory, combind with FY 2C and NCEP/NCAR data. The performance of simulated and measured incoming shortwave radiation showed good consistent relationship, with a determination coefficient R2=0.74. Ablation computations of three sub-periods, using the classical degree-day model, indicated evident temporal variation of degree day factors over the whole summer. With spatial resolution increased, the both models can give good results, especially when the spatial resolutions was 50 m contour interval. It found that the enhanced temperature-index model can get better result than the simple degree-day model with spatial resolutions of 200 m and 100 m contour interval. However, there was no evident improvement by using the enhanced temperature-index model when the spatial resolution was 50 m contour interval due to the uncertainty of simulated incoming shortwave radiation.

Key words: Mountain glacier    Simple degree day model    Enhanced temperature-index model    Ablation simulating    Contour interval
收稿日期: 2010-07-20 出版日期: 2011-04-10
:  P343.6  
基金资助:

国家自然科学基金重大研究计划项目“黑河寒区水文过程小流域综合观测与模拟”(编号:91025011);国家自然科学基金项目“黑河源区高山寒漠带水文过程观测试验研究”(编号:40771045); 中国科学院知识创新工程重要方向性项目“西部冰川变化及其影响监测与评估方法研究”(编号:KZCX2-YW-301-3)资助.

通讯作者: 卿文武     E-mail: qingww@lzb.ac.cn
作者简介: 卿文武(1982-),男,湖南娄底人,博士研究生,主要从事寒区水文研究. E-mail:qingww@lzb.ac.cn
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引用本文:

卿文武,陈仁升,刘时银,韩海东,王建. 两类度日模型在天山科其喀尔巴西冰川消融估算中的应用[J]. 地球科学进展, 2011, 26(4): 409-416.

Qing Wenwu,Chen Rensheng,Liu Shiyin,Han Haidong, Wang Jian. Research and Application of Two Kinds of Temperature index Model on the Koxkar Glacier. Advances in Earth Science, 2011, 26(4): 409-416.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2011.04.0409        http://www.adearth.ac.cn/CN/Y2011/V26/I4/409

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