Analysis of Air Temperature Change Characteristic in Recent 55 a in Kaifeng
Tong Wenwei1,2,Zhang Chunhong3,He Weiguang4,Sun Jinglan1, Liu Jing1 (1.Henan Provincial Meteorological Bureau Monitoring Network Department,Zhengzhou 450003,China;2.Kaifeng Meteorological Bureau,Kaifeng 475000,China;3.Xin'an Meteorological Bureau,Xin'an 471800,China;4.College of Environment and Planning of Henan University,Kaifeng 475000,China)
Based on air temperature data from 1951 to 2005,the paper analyzes air temperature change characteristic in recent 55 a in Kaifeng.The results show air temperature change is on the rise as a whole,which is consistent with global climatologic change.The mean annual temperature is lower in the first decade,stable in the next 30a,ascent in the last 15 a.The air temperature is relative stable in summer;and is ascending in spring,autumn and winter,especially in winter.The air temperature is ascending from January to April and October to December;and is relative stable in May,August and September;and is falling slightly in June and July.The annual extreme maximum temperature is obviously falling;and the annual mean maximum temperature keeps stable;the annual extreme minimum temperature and annual mean minimum temperature is obviously ascending. The extreme air temperature event reduces and occurrence degree gets down.
【CateGory Index】： P423.3;P468.021