廊坊市近50年气温的时空变化特征

采用1964—2013年廊坊市9个气象站的气温观测资料,分析廊坊市日平均气温、日最高气温、日最低气温的时空变化特征,并利用Morlet小波变化和Mann—Kendall突变检验等方法对廊坊市日平均、日最高、日最低气温进行周期分析和突变检验。结果表明:(1)平均气温、平均最高气温、平均最低气温和高温极值变暖趋势显著,年际增长率分别为0.38℃/10a、0.28℃/10a、0.38℃/10a、0.36℃/10a;(2)平均气温、平均最高气温、平均最低气温、高温极值、低温极值和高温日数均具有4~6a的短周期、9a的较长周期和一个年代际的长周期;(3)20世纪80年代中期到90年代中期平均气温、平均最高气温、平均最低气温、高温极值、低温极值和高温日数均存在一个显著突变;(4)平均气温、平均最高气温、平均最低气温、高温极值、低温极值和高温日数在空间分布上均呈现南高北低趋势。

Spatial and Temporal Variations of Temperature in Langfang during 1964-2013

In this paper, the temperature observation data of 9 meteorological stations in Langfang city during 1964-2013 are used to analyze the temporal and spatial variation characteristics of daily average temperature, daily maximum temperature, daily minimum temperature and daily minimum temperature in Langfang city. And Morlet wavelet transform and Kendall ? Mann mutation test are used to analyze the daily average, daily maximum and minimum temperature in Langfang city. The results are as follows: (1) the average temperature, average maximum temperature, average minimum temperature and extreme warming trend are significant, and the annual growth rate is 0. 38 /10a, 0. 28 /10a, 0. 38 /10a, 0. 36 C /10a. (2) Mean air temperature, mean maximum temperature, mean minimum temperature, maximum temperature, low temperature and high temperature days all have short period of 4~6a, longer period of 9a and long period of time. ( 3 ) The average temperature, average maximum temperature, average minimum temperature, maximum temperature, low temperature and high temperature days in the middle of the 1980‘s to the 1990 ’ s, there was a significant mutation. ( 4 ) Average temperature, average maximum temperature, average minimum temperature, extreme high temperature, extreme low temperature and high temperature, number in the space distribution showed a high trend in the south and low in the north.