【摘要】 利用河北省70个站近50年的观测资料,分析了河北省最高气温和高温日数年际和年代际演变特征及其区域差异。结果表明:全省及各区域年平均最高气温呈现升高态势,全省大部分地区增温在0.5~1.0℃之间。冬季增温幅度最大,春夏季次之,秋季最小;全省70%左右的站点从20世纪60年代到90年代大于等于30℃高温日数呈现增加趋势,80年代到90年代是增幅最大的时段。增加幅度最大的区域是冀东平原区;大于等于35℃高温日数各年代平均值变化幅度相对平缓,年际变化则呈现先降后增的变化趋势,变化幅度小且增加趋势不明显。更多还原

【Abstract】 The interannual and interdecadal changes of maximum temperature and the number of high temperature days in Hebei Province and the regional differences of the changes are analyzed with the observational data in recent 50 years in Hebei.The results indicate that the average maximum temperatures in all parts and the whole province showed an increasing trend;the increasing rate of annual maximum temperature had a range of 0.5 to 1.0 ℃ in most parts of the province,but their warming rates are different.The maximum temperature in winter is the greatest and that in autumn is the smallest.The numbers of days with maximum temperature above 30 ℃ have been increasing from the 1960s to the 1990s for 70% stations.The most rapid warming occurred in the 1980s and 1990s,while the most obvious warming occurred in the eastern plain.The interdecadal change of the number of days with maximum temperature above 35 ℃ was slight,and the interannual change decreased at first and then increased and was smaller.更多还原