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冰川冻土 ›› 2016, Vol. 38 ›› Issue (1): 89-99.doi: 10.7522/j.issn.1000-0240.2016.0010

• 冰冻圈与全球变化 • 上一篇    下一篇

青藏高原春季土壤湿度与中国东部夏季降水之间的关系

李登宣, 王澄海   

  1. 兰州大学 大气科学学院 甘肃省干旱气候变化与减灾重点实验室, 甘肃 兰州 730000
  • 收稿日期:2015-11-26 修回日期:2016-01-06 出版日期:2016-02-25 发布日期:2016-05-30
  • 通讯作者: 王澄海,E-mail:wch@lzu.edu.cn. E-mail:wch@lzu.edu.cn
  • 作者简介:李登宣(1991-),男,江苏徐州人,2013年毕业于兰州大学,现为兰州大学在读硕士研究生,主要从事数值模式模拟、诊断分析方面的研究.E-mail:lidengx09@lzu.edu.cn
  • 基金资助:
    国家自然科学基金项目(91437217;41275061;41471034);国家重点基础研究发展计划(973计划)项目(2013CBA01808);中央高校基本科研业务费专项(Lzujbky-2015-k03)资助

The relation between soil moisture over the Tibetan Plateau in spring and summer precipitation in the eastern China

LI Dengxuan, WANG Chenghai   

  1. College of Atmospheric Sciences, Lanzhou University/Key Laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province, Lanzhou 730000, China
  • Received:2015-11-26 Revised:2016-01-06 Online:2016-02-25 Published:2016-05-30

摘要: 应用SVD方法分析了青藏高原地区春季土壤湿度异常和中国东部地区夏季降水之间的关系.结果表明,青藏高原不同地区、不同深度的土壤湿度与中国东部夏季降水的相关特征不同.青藏高原东北部和西北部0~10cm深度(表层)土壤湿度与中国华北、东北地区的夏季降水为正相关,而与华南地区为负相关;青藏高原中部及南部0~10cm表层土壤湿度与华北地区夏季的降水有较强负相关;青藏高原北部及东部10~200cm深度(深层)土壤湿度与华北、东北地区的夏季降水为负相关,而与华南地区夏季降水为正相关;青藏高原中东部10~200cm深层土壤湿度与长江中下游和华南大部分地区夏季降水呈负相关关系.即青藏高原不同地区、不同深度层春季土壤湿度的变化,对中国东部地区的夏季降水具有显著影响.

关键词: 青藏高原, 土壤湿度, 中国东部夏季降水, SVD

Abstract: The relation between soil moisture anomalies over the Tibetan Plateau and the summer precipitation in eastern China was analyzed using SVD method. The results show that the correlation between soil moisture over the plateau and summer precipitation in eastern China is various, which depends on location and depth. The surface soil moisture in the northeast and northwest of the Tibetan Plateau is positively related to the summer precipitation in North China and Northeast China, while it is negatively related to that in the South China. There is a strong negative correlation between the surface soil moisture in the central and southern part of the plateau and the summer precipitation in North China. The deep soil moisture in the northern and eastern Tibetan Plateau is negatively correlated with the summer precipitation in North China and Northeast China, while it is positively correlated with the soil moisture in South China. The deep soil moisture in the eastern and central Tibetan Plateau has a negative correlation with summer precipitation in the middle and lower reaches of the Yangtze River and most parts of South China. The changes of soil moisture in different regions and different depths over the plateau have a significant effect on the summer precipitation in eastern China.

Key words: Tibetan Plateau, soil moisture, summer precipitation in eastern China, SVD

中图分类号: 

  • P426.615