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KMID : 1024520110200081041
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Journal of the Environmental Sciences
2011 Volume.20 No. 8 p.1041 ~ p.1048
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Effects on Meteorological Variables During the Partial Solar Eclipse Event of 22 July 2009 in Korea
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Jeon Byung-Il
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Abstract
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The purpose of this study was to analyze the effects on meteorological variables in Seoul, Busan and Jeju during the partial solar eclipse event of 22 July 2009 in Korea. Solar irradiance decreased 16 and 19 minutes after eclipse in Seoul and Busan, and 6 minutes before eclipse in Jeju. Minimum solar irradiance occurred 7 and 3 minutes after maximum eclipse in Seoul and Busan, respectively, and 8 minutes before maximum eclipse in Jeju. Solar irradiance began to increase after maximum eclipse in Seoul and Busan, and recovered to the original state as eclipse ended. On the other hand, recovery of solar irradiance after maximum eclipse in Jeju was slower than those of two cities. Temperature drop due to partial solar eclipse were 0.7℃, 4.0℃, 1.5℃ in Seoul, Busan, and Jeju, respectively, and time needed to arrive minimum temperature from maximum eclipse were each 12, 32, 30 minutes, respectively. Change of relative humidity during partial solar eclipse were 2.6%, 17.4%, 12.3% in Seoul, Busan, and Jeju, respectively. Temperature drop turned out to be sharper as altitude increases. Wind speed decreased by each about 1.1 ㎧, 3.4 ㎧, 1.4 ㎧ due to partial solar eclipse in Seoul, Busan, and Jeju. Soil temperature of 5 ㎝ equally decreased by 0.2℃ in Seoul and Busan, soil temperature of 10 cm maintained almost constant, and soil temperature of 20 cm was hardly affected by eclipse.
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KEYWORD
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Partial solar eclipse, Meteorological variable, Solar irradiance
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