【摘要】 根据承德市1951—2007年的气温资料,采用趋势分析、小波分析等方法,对承德市气温变化进行了分析。发现:承德市近57a来气温呈上升趋势,尤其以近20a增温最为明显,年平均气温增温率达0.391℃/10a,各季节平均气温增温率平均每10年均达0.5℃左右。承德市年平均气温存在明显的多时间尺度变化,14a尺度周期和7a尺度周期表现明显。在14a尺度背景下,承德市目前处于气温偏高时期内。更多还原

【Abstract】 Based on the mean air temperature from Chengde observation station during 1951-2007,the change trends and characteristics of the air temperature were analysed by using of the linear trend analysis and Morlet wavelet analysis.The results show that the temperature of Chengde for the last 57 a tended to become warm,especially since 1988,the annual average temperature rised obviously.The ratio of mean air temperature at inter-annual level is 0.391 ℃/10 a,and is about 0.5 ℃/10 a at inter-seasonal level.The multi time scale is the change characteristics of the annual mean temperature,but dominated by 14 a and 7 a periods.On the background of 14 a periods,high temperature is the main characteristics of Chengde’s climate at present time.更多还原