极干旱区域台站迁徙前后资料的差异分析——以东疆托克逊站为例

Discrepancy Analysis on Meteorological Data before and after Station Migration in Extreme Drought Region:Taking Toksun Station in Eastern Xinjiang for Example

采用新疆托克逊站和参考站(尉犁、东坎两站)1974—2014年观测资料,分析了城市化对托克逊站气候资料的影响,结果表明:地处极干旱区域的托克逊站气温、相对湿度和平均风速与参考站一致性较差,其中,由于城市化发展造成托克逊县的升温率为0.44℃·(10 a)^(-1);均一性检测发现,由于城市化的影响,平均气温、相对湿度、风速均产生了断点。新站与旧站观测资料对比分析发现,由于新旧站环境差异大,使得年相对湿度新站比旧站低4.0%;年平均风速新站偏大1.3 m·s^(-1),年风向相符率低只有49.01%,平均风速全年各月在显著性水平0.05的条件下资料不连续。

Based on the observation data of Toksun Station and reference stations （Yuli Station andDongkan Station） during 1974-2014, the impact of urbanization on the climatic data of ToksunStation was analyzed, and it was found that Toksun Station in the extremely dry area showeda poorconsistency with the reference stations in terms of temperature, relative humidity and average windspeed. The raised temperature in Toksun County was 0.44℃·（10 a）-1due to the urbanization. Thehomogeneity test found that the average temperature, relative humidity and wind speed all hadabreakpoint due to the influence of urbanization. The comparison of observation data between thenew station and the old one showed that the relative humidity at the new station was 4.0% lowerthan the old station due to the great environmental difference. Annual average wind speed was 1.3m·s -1higher than the old one. The coincidence rate of wind direction was 49.01%. As for theaverage wind speed, the data was discontinuous at the significance level of 0.05.