摘要
利用1961-2005年大连地区6个气象观测站的逐日平均气温、最低气温和最大平均风力资料,分析近45年大连地区寒潮活动的气候特征,着重研究大连地区寒潮的年代际、年际变化.结果表明:大连地区寒潮活动各地差异较大,南部开始早,结束晚;东部开始晚,结束早.大连地区寒潮主要出现在11、12月和1月.近45年来,大连地区寒潮异常具有三次跃变,跃变发生在20世纪70年代中期、80年代中后期和21世纪初期.大连的寒潮活动也可以分为四个阶段:活跃期-沉寂期-正负振荡期-沉寂期.近45年来,大连地区寒潮活动具有减少的趋势,从1961-2005年,趋势性寒潮频数减少为0.7次/10年.
Climate features of cold wave have been analyzed by using daily temperature (daily mean and the lowest) and wind data in six stations of Dalian during 1961 -2005. The primary results are as follows: The activities of the cold wave is different between south and east in Dalian, it comes earlier and goes later in south Dalian compared to east Dalian. The cold wave air primarily happens in November, December and January. The variability of the cold wave in Dalian over the past 45 years has three regime shifts ocurring in 1975,1985 and 2001. The frequency of the cold wave in Dalian showed negative tendency and kept decreas- ing gradually by 3.15 times in past 45 years.
出处
《大连海事大学学报》
CAS
CSCD
北大核心
2007年第1期154-156,160,共4页
Journal of Dalian Maritime University
关键词
大连地区
寒潮
气候变化
全球变暖
Dalian area
cold wave
climate change
global warming