이어도 기상 관측 자료를 활용한 장마 시작일 분석
Analysis for Onset of Changma Using Ieodo Ocean Research Station Data
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참고문헌
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초록
The definition of onset date of Changma is revisited in this study using a qualitycontrolled Ieodo ocean research station data. The Ieodo station has great importance in terms ofits southwest location from Korean Peninsula and, hence, makes it possible to predict Changmaperiod in advance with less impact of continents. The onset date of Changma using the Ieodostation data is defined by the time that meridional wind direction changes and maintains fromnortherly to southerly, and then the zonal wind changes from easterly to westerly after firstJune. This definition comes from a recognition that the establishment and movement of thewestern North Pacific subtropical high (WNPSH) cause Changma through southwesterly flow. The onset data of Changma has been determined by large-scale dynamic-thermodynamic characteristicsor various meteorological station data. However, even the definition based on circulationdata at the Ieodo station has a potential for the improved prediction skill of the onset dateof Changma. The differences between before and after Changma, defined as Ieodo station data,are also found in synoptic chart. The convective instability and conspicuous circulations, correspondinglow-level southwesterly flow related to WNPSH and strong upper-level zonal wind,are represented during Changma.
Abstract
The definition of onset date of Changma is revisited in this study using a qualitycontrolled Ieodo ocean research station data. The Ieodo station has great importance in terms ofits southwest location from Korean Peninsula and, hence, makes it possible to predict Changmaperiod in advance with less impact of continents. The onset date of Changma using the Ieodostation data is defined by the time that meridional wind direction changes and maintains fromnortherly to southerly, and then the zonal wind changes from easterly to westerly after firstJune. This definition comes from a recognition that the establishment and movement of thewestern North Pacific subtropical high (WNPSH) cause Changma through southwesterly flow. The onset data of Changma has been determined by large-scale dynamic-thermodynamic characteristicsor various meteorological station data. However, even the definition based on circulationdata at the Ieodo station has a potential for the improved prediction skill of the onset dateof Changma. The differences between before and after Changma, defined as Ieodo station data,are also found in synoptic chart. The convective instability and conspicuous circulations, correspondinglow-level southwesterly flow related to WNPSH and strong upper-level zonal wind,are represented during Changma.
참고문헌 (21)
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