地球科学进展 ›› 2011, Vol. 26 ›› Issue (1): 48 -56. doi: 10.11867/j.issn.1001-8166.2011.01.0048

研究论文 上一篇    下一篇

1970—2000年中国近地层大气热力增强的气候效应
徐兴奎   
  1. 中国科学院大气物理研究所国际气候与环境科学中心, 北京100029
  • 收稿日期:2010-01-25 修回日期:2010-06-23 出版日期:2011-01-10
  • 通讯作者: 徐兴奎 E-mail:xkxu@mail.iap.ac.cn
  • 基金资助:

    中国科学院知识创新工程项目“重大气象水文灾害综合风险评估研究”(编号:KZCX2-YW-Q03-3);国家重点基础研究发展计划项目“气候变化对区域水循环的影响机理研究”(编号:2010CB951101)和“海陆热力差异对海气相互作用的调控”(编号:2006CB403607) 资助

Climatic Effect of Atmospheric Thermodynamics over Land Surface from 1970-2000

Xu Xingkui   

  1. Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029, China
  • Received:2010-01-25 Revised:2010-06-23 Online:2011-01-10 Published:2011-01-10

中国区域1970—2000年622个气象观测台站资料EOF分析显示,气温的上升导致中国大部分地区饱和水汽压差呈上升趋势,大气热力强度增加,风动力明显减弱。内蒙中部以南至长江中游以北区域是大气热力增强最为敏感的地区。气温升高导致这一区域大气“干燥力”增强,区域蒸发潜力下降速度低于其他地区,气温的上升对低云覆盖产生一定程度的影响。内蒙中部以南至长江中游以北区域低云覆盖率减少最多,这与该地区气候变暖导致低云凝结高度升高,最终影响到区域低云覆盖率有关。

Empirical Orthogonal Function (EOF) analysis of 622 meteorological station data from 1970-2000 shows an increasing trend for vapor pressure deficit as well as increasing atmospheric thermodynamics in most regions of China due to climate warming. At the same time, wind speed decreases. Regions from middle part of Inner Mongolian to the north of middle reaches of Changjiang River is most sensitive for enhancing atmospheric thermodynamics, where “dry force” keeps up rise because of up going temperature,and potential evaporation is dropping slower than in other regions. The rise in temperature also has impact on low cloud cover from the middle part of Inner Mongolian to the north of middle reaches of Changjiang River, where low cloud cover is dropping fast. It is likely that climatic warming results in lifting condensation level of low cloudbase, and induces the change of low cloud cover.

中图分类号: 

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