中国物理B ›› 2012, Vol. 21 ›› Issue (10): 109203-109203.doi: 10.1088/1674-1056/21/10/109203

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    

Characteristics of the spatiotemporal distribution of daily extreme temperature events in China: Minimum temperature records in different climate states against the background of the most probable temperature

钱忠华a, 胡经国a, 封国林a b, 曹永忠a   

  1. a College of Physical Science & Technology, Yangzhou University, Yangzhou 225009, China;
    b National Climate Center, Beijing 100081, China
  • 收稿日期:2012-02-27 修回日期:2012-04-11 出版日期:2012-09-01 发布日期:2012-09-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 41105033) and the National Basic Research Program of China (Grant No. 2012CB955901).

Characteristics of the spatiotemporal distribution of daily extreme temperature events in China: Minimum temperature records in different climate states against the background of the most probable temperature

Qian Zhong-Hua (钱忠华)a, Hu Jing-Guo (胡经国)a, Feng Guo-Lin (封国林)a b, Cao Yong-Zhong (曹永忠)a   

  1. a College of Physical Science & Technology, Yangzhou University, Yangzhou 225009, China;
    b National Climate Center, Beijing 100081, China
  • Received:2012-02-27 Revised:2012-04-11 Online:2012-09-01 Published:2012-09-01
  • Contact: Cao Yong-Zhong E-mail:yzucao@yzu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 41105033) and the National Basic Research Program of China (Grant No. 2012CB955901).

摘要: Based on the skewed function, the most probable temperature is defined and the spatiotemporal distributions of the frequencies and strengths of extreme temperature events in different climate states over China are investigated, where the climate states are referred to as State I, State II and State III, i.e., the daily minimum temperature records of 1961-1990, 1971-2000, and 1981-2009. The results show that in space the frequency of high temperature events in summer decreases clearly in the lower and middle reaches of the Yellow River in State I and that low temperature events decrease in northern China in State II. In the present state, the frequency of high temperature events increases significantly in most areas over China except the north east, while the frequency of low temperature events decreases mainly in north China and the regions between the Yangtze River and the Yellow River. The distributions of frequencies and strengths of extreme temperature events are consistent in space. The analysis of time evolution of extreme events shows that the occurrence of high temperature events become higher with the change in state, while that of low temperature events decreases. High temperature events are becoming stronger as well and deserve to be paid special attention.

关键词: extreme temperature, most probable temperature, climate state

Abstract: Based on the skewed function, the most probable temperature is defined and the spatiotemporal distributions of the frequencies and strengths of extreme temperature events in different climate states over China are investigated, where the climate states are referred to as State I, State II and State III, i.e., the daily minimum temperature records of 1961-1990, 1971-2000, and 1981-2009. The results show that in space the frequency of high temperature events in summer decreases clearly in the lower and middle reaches of the Yellow River in State I and that low temperature events decrease in northern China in State II. In the present state, the frequency of high temperature events increases significantly in most areas over China except the north east, while the frequency of low temperature events decreases mainly in north China and the regions between the Yangtze River and the Yellow River. The distributions of frequencies and strengths of extreme temperature events are consistent in space. The analysis of time evolution of extreme events shows that the occurrence of high temperature events become higher with the change in state, while that of low temperature events decreases. High temperature events are becoming stronger as well and deserve to be paid special attention.

Key words: extreme temperature, most probable temperature, climate state

中图分类号:  (Abrupt/rapid climate change)

  • 92.70.Aa