日全食期間武漢市氣象要素變化特征

doi:10.3969/2012jms.00**

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日全食期間武漢市氣象要素變化特征
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                        10.3969/2012jms.00**
                    
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中圖分類號(hào):P421
基金項(xiàng)目:湖北省氣象局重點(diǎn)項(xiàng)目（QY-Z-201009），武漢區(qū)域氣候中心自立課題項(xiàng)目（wyh2009-1）

Change characteristics of meteorological factors in Wuhan during the total solar eclipse in cloudy situation

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根據(jù)2009年7月22日日全食期間武漢市直接輻射、總輻射、氣溫、地表溫度、地氣溫差、相對(duì)濕度、風(fēng)速和云量等氣象要素逐分鐘資料以及日全食各個(gè)階段發(fā)生時(shí)刻，對(duì)各要素進(jìn)行特征分析和t檢驗(yàn)，結(jié)果表明：(1）日全食間，直接輻射量和總輻射量變化特征基本一致，相關(guān)系數(shù)高達(dá)09，其中總輻射量出現(xiàn)較大幅度的下降。(2）氣溫、地表溫度和地氣溫差均經(jīng)歷了上升—下降—上升變化過程，氣溫極大值和極小值均出現(xiàn)滯后現(xiàn)象。(3）相對(duì)濕度呈緩慢上升—維持—下降變化趨勢(shì)，峰值持續(xù)時(shí)間達(dá)19 min。(4）初虧至食甚風(fēng)速呈“W”型變化，而食甚至復(fù)圓風(fēng)速則先下降后上升。(5）除風(fēng)速和云量外，其他氣象要素變化達(dá)到顯著或極顯著，可見大多數(shù)氣象要素變化顯著。

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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.

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馬德栗,陳正洪,向華.日全食期間武漢市氣象要素變化特征.氣象科學(xué),2011,(1):54-60 Ma Deli, Chen Zhenghong, Xiang Hua. Change characteristics of meteorological factors in Wuhan during the total solar eclipse in cloudy situation. Journal of the Meteorological Sciences,2011,(1):54-60

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收稿日期:2009-08-27
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