1953—2014年桓仁县四季开始日期及持续天数变化特征分析

Analysis on Characteristics of Start Dates and Lasting Days Changes of Four Seasons in Huanren County from 1953 to 2014

采用桓仁县国家基本气象站1953—2014年逐日平均气温观测资料,运用5 d滑动平均气温法,分析了1953—2014年桓仁县四季开始的平均日期、四季持续天数。研究结果表明:1953—2014年间,桓仁县四季平均开始日分别为4月24日、7月12日、8月19日和10月14日,春、夏、秋、冬四季开始日的气候倾向率分别为-0.2、-0.9、0.1、0.6 d/10年;各季节持续的天数分别为80、39、56、192 d,各季节持续天数的气候倾向率分别为-0.2、0.6、0.5、-0.8 d/10年。

Based on the daily mean temperature data of national basic station from 1953 to 2014 in Huanren County, the start dates and sustained times of four seasons were analyzed by the 5d moving mean temperature method.The result showed that the start dates of Spring, Summer, Autumn and Winter were April 24 ,July 12,August 19 and October 14 ,respectively;the tendency rate of climate change were -0.2 d per 10 years, -0.9 d per 10 years,0.1 d per 10 years,0.6 d per 10 years,respectively;the sustained times of four seasons were 80 d, 39 d, 56 d and 192 d, and the tendency rates of climate change were -0.2 d per 10 years ,0.6 d per 10 years ,0.5 d per 10 years,-0.8 d per 10 years ,respectiveiy.