摘要
根据2009年7月22日日全食期间武汉市直接辐射、总辐射、气温、地表温度、地气温差、相对湿度、风速和云量等气象要素逐分钟资料以及日全食各个阶段发生时刻,对各要素进行特征分析和t检验,结果表明:(1)日全食间,直接辐射量和总辐射量变化特征基本一致,相关系数高达0.9,其中总辐射量出现较大幅度的下降。(2)气温、地表温度和地气温差均经历了上升—下降—上升变化过程,气温极大值和极小值均出现滞后现象。(3)相对湿度呈缓慢上升—维持—下降变化趋势,峰值持续时间达19 min。(4)初亏至食甚风速呈"W"型变化,而食甚至复圆风速则先下降后上升。(5)除风速和云量外,其他气象要素变化达到显著或极显著,可见大多数气象要素变化显著。
Based on records per minute of direct radiation,total radiation,air temperature,ground surface temperature,the difference between air temperature and ground surface temperature,relative humidity,wind speed,cloud cover and the occurreence time of every stage of a total solar eclipse,the authors analyzed the changes of the 8 meteorological elements during July 22,2009 in Wuhan city.The results showed that：（1） The change characteristics of direct radiation and total radiation were basically the same,and the correlation coefficient was as high as 0.9,however the total radiation value had decreased sharply.（2） The change characteristics of air temperature,ground surface temperature and the difference of air temperature and ground surface temperature appeared similarly,which experienced rise-drop-rise process and the time of extreme air temperature has been lagged.（3） The change tendency of relative humidity assumed rise-maintenance-drop process,and the peak duration time was 19 min.（4） Wind speed was ＂w＂-type changes in characteristics from first contact to min totality,but it appeared ＂decrease-increase＂ in characteristic during min totality to forth contact.（5） During the total solar eclipse all meteorological factors but wind speed and cloud cover have changed significantly,so it can be concluded that the majority of meteorological elements undergo significant change.
出处
《气象科学》
CSCD
北大核心
2011年第1期54-60,共7页
Journal of the Meteorological Sciences
基金
湖北省气象局重点项目(QY-Z-201009)
武汉区域气候中心自立课题项目(wyh2009-1)
关键词
日全食
T检验
气象要素变化
Total solar eclipse
T-test
Meteorological factors change
