The Korean Peninsula is located on the east coast of Asia, where the monsoon climate appears and results in a great variation of spatial and temporal distribution of precipitation. Precipitation is a important climatic element of Korean Monsoon phenom...
The Korean Peninsula is located on the east coast of Asia, where the monsoon climate appears and results in a great variation of spatial and temporal distribution of precipitation. Precipitation is a important climatic element of Korean Monsoon phenomena, and the amount of rainfall during summer has a large impact on national economy in Korea. Precipition is resulted from moisture supplies through the convergence of moisture transport. Therefore understanding of the distribution of precipitation needs the investigation of moisture distribution over East Asia.
The purpose of this study is to identify the characteristics of moisture distribution over East Asia during drought and wet periods of summer in Korea. The results of this study may be summarized as follows :
1) In surface pressure field during drought period of summer in Korea, the dew-point depression of Korean Peninsula are 3℃ to 6℃. In contrast, the section of moist air which dew-point depression is under 3℃ apears during wet period over Korean Peninsula.
2) The moisture distribution of the surface pressure field in South Korea is characterized by a greet variation of monthly and regional distribution. Especially drought periods make higher regional difference than wet periods.
3) In regional distribution of moisture, inland areas of southern part in Korea have lowest value of humidity. It coincides with the minimum rainfall area in Korea.
4) In distribution of dew-point depression of 850mb surface around Korean peninsula, drought period has 2℃ to 3℃ higher than wet period, whereas the section of moist air which dew-point depression is under 3℃ appears over the Korean Peninsula during wet period.
5) The shapes of the sections of moist air which appear over Korean Peninsula during wet periods of summer are tongue type or zonal type. This moisture is supplied from southern side or southwesthern side along the perimeter of the westhern edge of the subtropical high.