img

官方微信

img

群号:冰川冻土交流群

QQ群:218834310

高级检索

冰川冻土 ›› 1998, Vol. 20 ›› Issue (1): 64-67.

• 研究论文 • 上一篇    下一篇

用EOF方法研究青藏高原积雪深度分布与变化

柯长青1, 李培基2   

  1. 1. 中国科学院南京地理与湖泊研究所, 南京210008;
    2. 中国科学院兰州冰川冻土研究所, 兰州730000
  • 收稿日期:1997-04-15 出版日期:1998-02-25 发布日期:2012-04-26
  • 基金资助:
    中国科学院“八五”重大应用项目“灾害性气候的预测及其对农业年景和水资源调配的影响”(KY85-10)成果.

Research on the Characteristics of Distribution and Variation of Snow Cover on the Tibetan Plateau by Using EOF Analysis

KEChang-Qing1, LI Pei-Ji2   

  1. 1. Najing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008;
    2. Lanzhou Institute of Glaciology and Geocryology, CAS, Lanzhou 730000
  • Received:1997-04-15 Online:1998-02-25 Published:2012-04-26

摘要: 对青藏高原1978~1987年SMMR微波候积雪深度资料、55个地面基本气象台站1963~1992年逐日积雪深度记录进行了EOF分析。结果表明,青藏高原积雪空间分布极不均匀,四周多雪,特别是东西两侧多雪与广大腹地少雪形成鲜明对比。高原东部是高原积雪年际变化最显着的地区,它主导了整个高原积雪的年际变化,并且与西部多雪区年际波动呈反位相关系。从60年代到80年代积雪年际波动幅度有明显增加的趋势

关键词: 青藏高原, 积雪深度, EOF分析, 空间分布与变化

Abstract: The snow depth data of SMMR (1978~1987) and daily snow depth data at 55 primary meteorological stations covering the period of 1963~1992 were used to analyse the spatial and temporal characteristics of snow cover over the Tibetan Plateau by using EOF method. The results show that the spatial distribution of snow cover over the Plateau is very inhomogeneous. It is found that heavy snow cover appears in the periphery, especially in the western and eastern parts of the plateau, while light snow cover appears in the vast interior of the plateau. The heavy snow cover region in the east of the plateau is also the region where the most significant interannual variation of snow cover occurs, and dominates the interannual variation of snow cover in the whole plateau. There is an opposite phase relation between the western parts and the eastern parts of the plateau in the interannual fluctuation of snow cover. There is an increasing trend of interannual fluctuation amplitude of snow cover over the plateau from the 1960s to the 1980s.

Key words: Tibetan Plateau, snow depth, EOF analysis, spatial distribution and variation

中图分类号: 

  • P343.6