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冰川冻土 ›› 2014, Vol. 36 ›› Issue (3): 527-536.doi: 10.7522/j.issn.1000-0240.2014.0063

• 冰冻圈与全球变化 • 上一篇    下一篇

中国冰川面积随高程分布规律研究

张宜清1,3, 罗毅1, 孙林1, 刘时银2   

  1. 1. 中国科学院 地理科学与资源研究所 生态系统网络观测与模拟重点实验室, 北京 100101;
    2. 中国科学院 寒区旱区环境与工程研究所 冰冻圈科学国家重点实验室, 甘肃 兰州 730000;
    3. 中国科学院大学, 北京 100049
  • 收稿日期:2014-01-08 修回日期:2014-04-09 出版日期:2014-06-25 发布日期:2014-07-16
  • 作者简介:张宜清(1987-),男,江苏徐州人,2010年毕业于中国农业大学,现为中国科学院地理科学与资源研究所在读博士研究生,主要从事水文模型与流域模拟研究.E-mail:zhyqing2006@163.com
  • 基金资助:
    国家科技支撑计划项目(2012BAC19B07);国家重点基础研究发展计划(973计划)项目(2010CB951002)资助

Study of the elevation-dependent glacierized area in China

ZHANG Yiqing1,3, LUO Yi1, SUN Lin1, LIU Shiyin2   

  1. 1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    2. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-01-08 Revised:2014-04-09 Online:2014-06-25 Published:2014-07-16
  • Contact: 罗毅,E-mail:luoyi@igsnrr.ac.cn E-mail:luoyi@igsnrr.ac.cn

摘要: 冰川面积随高程分布规律是冰川系统结构研究中的重要内容. 根据中国第一次冰川编目数据集,将全国冰川划分为27个研究区域,基于SRTM-DEM数据,分别提取了各研究区分段高程所占面积,分析了冰川面积随高程的变化. 结果表明:各研究区冰川面积都随高程呈偏态分布. 依据统计理论,建立了冰川面积随高程分布的二阶高斯分布偏态回归模型,回归模型决定系数均大于0.97,相对误差较小. 根据偏态回归模型,计算出了冰川系统高度特征值,并分析了冰川面积分布的区域性差异. 该模型一方面可以表达冰川面积在中间高程的集中程度;另一方面可以描述冰川面积在两侧分布的差异性,并可以用来分析未来冰川的变化. 偏态分布模型能很好地描述中国冰川面积随高程分布规律,为冰川系统结构的研究和冰川区域分布差异提供参考.

关键词: 冰川系统结构, 面积-高程, 偏态分布

Abstract: The elevation-dependent glacierized area is an important part of the structure of glacier system. It is usually expressed by some empirical formulas which are difficult to use in hydrologic simulation. Based on SRTM-DEM, the glaciers in China were divided into 27 regions and glacierized area changing with elevation was extracted region by region according to the Glacier Inventory of China. It is found that the elevation-dependent glacierized area shows a skewed distribution in all regions. Based on statistical theory, a second-order Gaussian regression model with skewed distribution of elevation-dependent glacierized area was built, and the regression coefficients were all greater than 0.97, with smaller relative errors. A normal distribution model was also built in each region. Comparative analysis of the two methods shows that for some regions the normal distribution model is better, but for some parts it does not describe well, especially at lower elevation and higher elevation parts. The elevation structure characteristics of glacier system were computed, and the regional differences in elevation-dependent glacierized area were analyzed. On one hand, the skewed distribution model can expresses the concentration degree at the central elevation, on the other hand it can describes the differences on both sides, and can be used for the analysis of glacier variations. As a whole, skewed distribution model can well describe the elevation-dependent glacierized area, which is useful for glacier system research and for division of glaciers in China.

Key words: structure of glacier system, elevation-dependent glacierized area, skewed distribution

中图分类号: 

  • P343.6