石家庄地区近46a温度变化特征

Characteristics of Temperature Variation in Shijiazhuang in Recent 46 Years

利用石家庄地区1961～2006年5个气象站气温资料，分析了该地区的平均气温、平均最高气温、平均最低气温、平均日较差以及炎热日和寒冷日的年际以及各月的变化特征。分析结果表明，近46a来，石家庄地区的气候显著增暖，平均气温冬季增暖幅度最大，夏季最小，2月份增暖幅度最大，5月份最小。与平均气温变化趋势相一致，最高温度和最低温度也呈上升趋势，其中最低温度的升高趋势远大于平均气温和最高温度。石家庄地区中东部增暖幅度较大。近46a平均日较差显著减小，这主要是因为最低气温的升高幅度大于最高气温。寒冷日数显著减少，炎热日数增加不明显，西部、北部和南部的炎热日数甚至呈弱的减少趋势。

Based on the daily temperature observation data of 5 stations in Shijiazhuang during 1961 -2006, the trends and characteristics of the daily mean temperature, the maximum and minimum daily temperature, the temperature daily range, as well as the hot and cool days were analyzed. The results show that the climate in Shijiazhuang had obviously warming trends in the recent 46 years, with the strongest warming trends in winter. Monthly temperature changes show that the most obvious amplitude was in February and the weakest was in May. Similar to the mean temperature, both the maximum and minimum temperature were in a rising trend as well. The rising trend of minimum temperature was clearer than the maximum and mean temperature. The strongest warming trend occur in the middle and the eastern part of Shijiazhuang. Temperature daily range was remarkably getting narrower in the recent 46 years. This was probably due to the greater increase in minimum temperature than maximum temperature. The cool days were decreasing but the change of hot days was not obvious. Hot days in the western, northern and southern part of Shijiazhuang show weak decreasing trend.