和田河流域1954-2007年气温及降水气候特征分析

Climatic Characteristics of Temperature and Precipitation in Hetian River Basin during 1954-2007

应用和田河流域和田市气象站1954—2007年逐月平均气温和降水量资料,采用趋势系数、Morlet小波分析法分析了54a来和田河流域气温、降水趋势变化及周期特征,结果表明:气温和降水变化呈暖湿化发展,气温线性变暖率为0.33℃/10a,降水线性递增率为2.1mm/10a,各年代变化趋势存有差异,但基本与西北地区气候变化趋势一致;小波系数的实部、模、位相信息准确揭示出了不同时间尺度下气温、降水的年际、年代际周期演变、强度变化以及突变特征。

Using monthly temperature and precipitation data of Hetian Meteorological station in Hetian River Basin during 1954-2007, this study analyzed the temperature, the precipitation tendency changes and the cyclical characteristics of Hetian River basin by the method of tendency coefficient and Morlet wavelet analysis. The results show that： the changes of temperature and precipitation are become of warming and wetting, the linear warm rate of temperature changes is 0.33℃/10a, the linear increasing rate of precipitation is 2.1mm/10a, and the change tendencies are difference in each decade but are basically consistent with the climate change tendency in northwest region of China; the real part, mold and phase information of wavelet coefficient reveal accurately the interannual and inter-decade cycle evolvement, the intensity change and the sudden change characteristic of temperature and precipitation in different time scale.