河北省木本植物物候变化特征及其对气候变暖的响应

以1981-2006年河北省10个国家农业气象观测站的木本植物物候观测资料和47个气象站的地面观测资料为基础,运用线性倾向估计、Pearson相关系数、EOF和REOF等统计学方法,研究了河北省木本植物物候期的变化特征及其对气候变暖的响应。结果表明：河北省木本植物展叶始期总体呈提前趋势,其中东部沿海平原提前趋势最大,中南部平原次之,西北部山区最小;叶初变色期主要表现出推迟趋势,生长季长度以延长趋势为主;春季气温对展叶始期的影响最显著,河北省春季气温每上升1℃,木本植物展叶始期提前4.6d;各站点生长季倾向率与年均温倾向率呈显著正相关,即年均温升幅大的站点,生长季延长的幅度也较大。研究结果对丰富河北省物候与气候变化关系研究具有一定意义。

Phenology Change for Woody Plants and Its Responses tO Climate Warming in Hebei Provilace

The phenophases change of woody plant and its responses to climate warming was analyzed by using the methods of linear trend method,Pearson correlation coefficient,EOF and REOF,based on woody plant phenological data from 10 national agro-meteorological stations and meteorological data from 47 stations from 1981 to 2006 in Hebei province.The results showed that the first leafing date of woody plants advanced in last 26 years,and most obvious in eastern coastal plain,following as central-southern plain,and the north-west mountain region not obvious.The first leaf coloring date delayed and the growing season extended.The spring temperature had significantly impact on first leafing date of woody plant,which could advance 4.6 days under 1℃ increasing.The trends of growing season had significant positive correlation to that of annual mean temperature in all stations.The result was helpful to study the relationship between phenophases and climate change in Hebei province.