河北省沿海地区气候变化特征及相关分析

利用南堡盐场气象站1966～2005年40 a逐年各月的气温、降水量、蒸发量、日照时数和风速等资料,应用气候倾向率、Mann-Kendall非参数检验和相关分析等方法,分析了各气候要素的变化特征。结果表明：年平均气温、年平均最高气温和年平均最低气温呈上升趋势,且均通过了99%显著性检验,气候倾向率分别为0.41℃/10 a、0.31℃/10 a和0.46℃/10 a;年日照时数和年蒸发量呈减少趋势,且通过了99%显著性检验,气候倾向率分别为-224.1 h/10 a和-147 mm/10 a;年降水量和年平均风速变化趋势不显著;年平均气温与年日照时数和年蒸发量为负相关关系,年日照时数与年蒸发量为正相关关系,年平均气温升高不是日照时数和蒸发量减小的直接原因,日照时数是影响蒸发量的1个主要因子。

Climatic Change Characteristics and Correlation Analysis in Coastal Region of Hebei Province

Based on the data of monthly temperature,precipitation,evaporation,sunshine hours and wind speed of the weather station in Nanbao Salt Field from 1966 to 2005,the climatic change characteristics were analyzed by using the climatic trend rate,Mann-Kendall nonparametric test and correlation analysis method.The results showed that the annual mean temperature,the annual mean highest temperature and the annual mean lowest temperature assumed rising trends,which past 99% significance test,and the climatic trend rate were 0.41℃/10 a,0.31℃/10 a and 0.46℃/10 a,respectively.The annual sunlight hours and evaporation presented descending trend,which past 99% significance test,and the climatic trend rate were-224.1h/10 a and-147mm/10 a,respectively.The changes of annual precipitation and mean wind speed were not remarkable.The annual mean temperature had a negative correlation with the annual sunlight hours and evaporation,and there was a positive correlation between annual sunlight hours and evaporation.The increasing of annual mean temperature was not the direct cause of the reducing of sunlight hours and evaporation,and the sunlight hours were the main factor affecting the evaporation.