河北省温度和降水变化对农业的影响

Impacts of Changes of Temperature and Precipitation on Agriculture in Hebei Regions

利用京、津、冀区域内70个气象观测站点自建站至2000年的气象观测资料,以温度和降水作为主要因子,重点分析了河北省平均温度、降水量的时空分布、年际和年代际变化.结果表明:随着全球气候变暖,河北省20世纪90年代的温度升高了0.8～1.2℃,平均每10年升高0.4℃;年降水量减少了87mm,平均每10年减少21mm.气候变化使冬小麦各生育期均有所提前,冬小麦种植北界到90年代延伸到了41°N以北,和50年代相比向北推移了30～50km.

Based on the available observation data from 70 meteorological stations in Beijing, Tianjin and Hebei regions, recorded from the very beginning of the observation to 2000, the changes of the characteristics of average temperature and the spatio - temporal distribution of the precipitation and the annual, inter - annual and decade were analyzed, taken temperature and precipitation as main meteorological factors. The results showed that the mean temperature had increased by 0.8 - 1.2℃ averagely and increased by 0.4℃ per decade. The yearly precipitation had decreased by 87 mm averagely and by 21 mm per decade due to the global wanning up in 90＇ s these regions. The each growing period of winter wheat had moved up. The winter wheat growing boundary extended to over 4FN from the 1990＇ s, which was about 30 - 50 km northward compared with it in the 1950＇s.