河南烟区近35年来相对湿度变化特征分析

利用河南省41个气象观测站1971-2005年4-9月份的逐旬相对湿度资料,采用线性趋势分析、Mann-Kendall检验、小波分析等统计方法分析了河南烟区旬相对湿度的时空分布特征和变化规律,并分析了相对湿度与其他气象因子之间的关系.结果表明:4-9月份,河南烟区旬平均相对湿度、旬最大相对湿度、旬最小相对湿度变化均显著...

Relative Humidity Characteristic Analysis of Henan Tobacco Growing Areas in Recent 35 Years

The temporal-spatial distribution and variation features of ten-day relative humidity and the relationship between relative humidity and other meteorological factors in Henan tobacco-growing areas were analyzed using data from 41 stations over the years of 1971-2005 in Henan,adopting the methods of linear trend,Mann-Kendall test and wavelet analysis.Results indicated that during period April and September,the ten-day average relative humidity and ten-day maximum humidity and ten-day minimum have a significantly increasing trend.Abrupt changes took place from mid-to-late June to early or middle July and it showed high.The ten-day relative humidity was mainly >80% from mid-July to early September and other times it was mainly 60%~80%.Two cycles of relative humidity exist with periods of 3,6 and the former tended to evidently,what was more,the two periods showed localization.Relative humidity tended to rising in tobacco growth period and it was too high in maturation period.The relative humidity in different tobacco-growing areas in Henan ranked as south Henan,central Henan,west Henan and the variation of relative humidity in different growth period was root elongation stage,vigorous growth and stage maturing stage.There was a significantly positive correlation between relative humidity and rainfall,and significant negative correlation between relative humidity and sunshine duration,evaporation.The correlation between relative humidity and temperature was not significant.