摘要
在全球气候变暖的背景下,近些年江苏省气温明显升高,使得江苏省四季的起止时间和长度发生了明显的改变。本文通过分析多种季节划分方法,根据江苏省的气温分布特点,定义了适用于江苏省的四季划分方法。通过分析四季的变化,结果显示:(1)江苏省四季分明,且南北有明显的差别,就全省常年平均而言,冬季最长,其次是夏季,秋季和春季长度很相近,秋季略短。(2)过去几十年里,江苏省各地区各季节的长度和起止时间都发生了明显的变化,特别是自21世纪以来,这种变化速度明显加快,最主要的变化特点为:春季发生的时段向前移了近10 d;夏季明显变长,开始时间提前,结束时间推后;秋季的发生时段整体向后移;冬季明显缩短,特别是结束时间提前。
With the world climatic change the air temperature of Jiangsu province in recent years increased clearly. In this paper, by analyzing many methods of marking off the season and the air temperature distributing characteristic of Jiangsu province, the method of marking off the four seasons which adapts to Jiangsu province had been defined. The resuh shows ： （ 1 ） The four seasons of Jiangsu province could be divided easily and the difference between North and South areas was obvious. The length of winter of whole Jiangsu province is the longest, the next is summer, and the length of autumn is near the spring＇s. （2）In the past several decades, the four season＇s length and beginning and ending dates changed clearly, especially in this century, the change rate increased sharply. The main characteristic of the change can be concluded that the spring＇s occurrence moved ahead approximately by ten days; the length of summer became longer; the autumn＇s occurrence moved backwards, and winter became more and more short.
出处
《气象科学》
CSCD
北大核心
2008年第5期568-572,共5页
Journal of the Meteorological Sciences
基金
江苏省科委社会发展项目:江苏省干旱灾害监测预警系统的研制(BS2005072)
关键词
四季
气候变化
气温
Four seasons
Climatic change
Air temperature
作者简介
张静（1975-），女，辽宁铁岭，工程师，硕士，主要从事天气及气候预报的研究．zhang-jing09132008@yahoo.com.cn
