한반도에서 일사량의 기후학적 특성과 운량, 강수량, PM10 및 에어로졸 광학두께와의 관계
Analysis of the Relationship between the Climatological Characteristics of Insolation and Cloud Amount, Precipitation, PM10 and Aerosol Optical Depth in Korea
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초록
Spatio-temporal characteristics of insolation in South Korea were analyzed using the ground observed data from Korea Meteorological Administration (KMA) and Rural Development Administration (RDA). PRISM (Parameter-elevation Regressions on Independent Slopes Model) was used for generation of 1 km grid-type data. Trend and causes for insolation change were analyzed using ground observed precipitation and PM10, cloud amount and aerosol optical depth (AOD) retrieved from the MODIS (Moderate resolution Imaging Spectroradiometer) data. Quality control results showed that KMA data has a relatively low abnormal ratio (about 1%), but RDA's data has a higher abnormal ratio (5-15%). The seasonal average of insolation ranges from 6 to 20 MJ/ and is the largest in spring, followed by summer, fall, and winter. In general, insolation is high in the central and western regions of Korea but low in Jeju, the south, and north-central region. However, temporal variability is large in Jeju, Midwest, and South, but is small in North Central region. The insolation shows an increasing trend, in particular, during spring and summer, and it is related to the decreasing trends of precipitation and PM10 in May-June and August-September. The correlation coefficients between insolation and precipitation (Cloud, PM10, AOD) show that negative values, with high correlations in spring-autumn but low correlations in winter.
Abstract
Spatio-temporal characteristics of insolation in South Korea were analyzed using the ground observed data from Korea Meteorological Administration (KMA) and Rural Development Administration (RDA). PRISM (Parameter-elevation Regressions on Independent Slopes Model) was used for generation of 1 km grid-type data. Trend and causes for insolation change were analyzed using ground observed precipitation and PM10, cloud amount and aerosol optical depth (AOD) retrieved from the MODIS (Moderate resolution Imaging Spectroradiometer) data. Quality control results showed that KMA data has a relatively low abnormal ratio (about 1%), but RDA's data has a higher abnormal ratio (5-15%). The seasonal average of insolation ranges from 6 to 20 MJ/ and is the largest in spring, followed by summer, fall, and winter. In general, insolation is high in the central and western regions of Korea but low in Jeju, the south, and north-central region. However, temporal variability is large in Jeju, Midwest, and South, but is small in North Central region. The insolation shows an increasing trend, in particular, during spring and summer, and it is related to the decreasing trends of precipitation and PM10 in May-June and August-September. The correlation coefficients between insolation and precipitation (Cloud, PM10, AOD) show that negative values, with high correlations in spring-autumn but low correlations in winter.
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