重庆市年平均气温变化多时间尺度特征的诊断研究
A DIAGNOSTIC ANALYSIS OF MULTI-TIME-SCALE VARIATIONS OF TEMPERATURE IN CHONGQING
-
摘要: 利用长年代气温资料讨论了重庆市年平均气温的多时间尺度特征,结果表明:重庆市近几十年气温变化有明显的阶段性,但总的趋势是下降的,这与同期全球、北半球及中国气温有显著上升趋势有差异。Abstract:
Based on MHF wavelet transform during the past long years in Chongqing the variations of temperature were analyzed. Some multi-scale and jump features of variations were discovered. Results show that the variations of temperature in Chongqing contain obvious staggered features. The variation tendency of temperature is descend. It is opposite to the tendency of the variations of temperature of the global, northern hemisphere and China.
-
Key words:
- Temperature variations;
- Multi-time-scale;
- Wavelet t ransfo rm
-
图 2 全球(a)、北半球(b)、中国(c)年平均气温距平(说明同图 1) 及其时间尺度为32 a(d)、16 a(e)和8 a(f)小波系数(━ 全球,——— 北半球,—°— 中国,---重庆)
表 1 全球、北半球、中国气温变化小波系数序列(n=78) 与重庆的相关系数
-
[1] 王绍武主编. 现代气候学研究进展. 北京:气象出版社, 2001. 80~116. [2] Chen Longxun, Shao Yongning, Dong Min, et al. Preliminary analysis of climatic variation during the last 39 years in China. Adv Atmos Sci., 1991, 8:279~288. [3] 林振山.气候建模、诊断和预测的研究.北京:气象出版社,1996. 136~186. [4] 丁裕国,江志红.气象数据时间序列信号处理.北京:气象出版社,1998. 278~283. [5] 魏凤英.现代气候统计诊断预测技术.北京:气象出版社,1999. 106~113. [6] 丁裕国,江志红.气象数据时间序列信号处理.北京:气象出版社,1998. 149~155. [7] Zhou Xiuji, Chen Longxun, Li Weiliang, et al. Environment and climate change in China. Annual Report(1991-1995), CAMS,1996.10~20. [8] 黄荣辉. 引起我国夏季旱涝的东亚大气环流异常遥相关及其物理机制的研究. 旱涝气候研究进展. 北京:气象出版社,1990. 37~50.