基于潜在蒸散和干燥度指数的河北省农业气候区划

Agricultural climate division of Hebei Province based on potential evapotranspiration and surface aridity index

基于Penman-Monteith模型的潜在蒸散和降水量之比计算得到的干燥度指数作为衡量区域干湿状况的重要指标,已成为全球变化研究中的重要气候指标之一。本文利用温度气候带和以干燥度指数划分的干湿气候区作为二级气候区划指标,开展区域尺度的河北省农业气候分区,将河北省农业气候区划分为暖温带半湿润区,冀北中山中温带半湿润偏旱区、太行山暖温带半湿润偏旱区和滨海平原暖温带半湿润偏旱区,冀北高原中温带半干旱区、太行山北段中温带半干旱区和冀中、南平原暖温带半干旱区,中温带半干旱偏旱区。该分区为合理配置农业生产、改进耕作制度以及引入和推广新品种提供气候依据,同时也为相关部门采取应对措施减轻旱涝灾害及其不利影响提供参考。

Obtained by using FAO Penman-Monteith model and computing the ratio of potential evapotranspiration to precipitation,the indices to evaluate regional dry-wet status and aridity index play important roles in research of global climatic change.So,the agricultural climatic zones in Hebei Province were divided into semi-humid area in warm temperate zone,semi-humid prone to drought area in middle temperate zone in the mountains of northern Hebei,semi-humid prone to drought area in warm temperate zone in Taihang Mountains and coastal plain,semi-arid area in middle temperate zone in northern Hebei plateau and northern Taihang Mountains,semi-arid area in warm temperate zone in the southern and middle plain,semi-arid prone to drought area in middle temperate zone,on the basis of the primary and secondary indices of climatic band of temperature and aridity index.The agricultural climate division will provide climatic basis not only for agricultural production and water resources utilization but also for daily forecasting and mitigation of agro-meteorological disasters.