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호남지방 고층관측자료동화가 수치기상예보에 미치는 영향에 관한 연구
류찬수,원효성,이순환 한국지구과학회 2005 韓國地球科學會誌 Vol.26 No.1
Aerological observation at Heuksando located in south-western part of Koran Peninsula has been started at 1 June 2003. In order to clarify the improvement of meteorological prediction quality, it is necessary to compare between aerological data observed at Gawngju and Heuksando and to make clear the influence of Heuksando data assimilation. Therefore numerical simulations were carried out with High resolution meterological prediction system based on MM5 (The 5th Generation Mesoscale Model). The pattern of wind and temperature field observed at Heuksando and Gwangju are different due to land surface friction and sensible heat flux at surface and the wind field simulated with Gwangju and Heuksando aerological data agree well with observation wind field. Although the amount of precipitation in these experiments is underestimated, the area and starting time of precipitation around Honam province in case with Heuksando data is more reliable that without the data.
이순환,원효성 한국지구과학회 2005 한국지구과학회지 Vol.26 No.7
Heavy rain fall in the Korean Peninsula often occurs in the summer season due to MCC (Mesoscale Convective Complex) with complex mechanism. We analysed the Characteristics and the developing mechanism of MCC occurred at 14 July 2004. The results are as follows: a) There is strong wind inflow from the South-west china sea with heavy moisture and this moisture flux acts as the source of heavy rain, b) Because of the separation of upper and lower atmosphere due to an inversion layer at 600hPa, atmosphere over the Korea Peninsula is suddenly unstable. c) This MCC shows strong shear not with wind direction, but with the wind speed, and this wind shear continues the thermodynamic unstability of the convective system. d) MCC was suddenly developed over Heuksando at 1400LST 14 July 2004. Thus we can say that the topography also was strongly associated with the development of MCC and it is also necessary to clarify the relationship between topography and MCC development. in future research. 한반도집중호우를유발시키는중규모대류복합체는매우복잡한특성을띠고있다. 2004 년 7월 14일발생한중규모대류복합체의발달메커니즘을분석한결과, a) 대류복합체생성전에강한남서기류의유입이있었으며, b) 600 hPa 고도에서강한역전층이나타났다. 역전층은상층과하층간의상당온위의차이를유발하여대기불안정을더욱강화시켰다. 그리고 c) 일반적인중규모대류복합체특징인풍향의쉬어보다는풍속의쉬어에의해대류계의열역학불안정이강화되었다. 그리고 d) 흑산도등해안지방에의해유발되는난류및대기불안정으로인하여중규모대류복합체가해안지방에서발달한것으로보인다. 그러므로지형에의한중규모대류복합체의발달메커니즘규명이필요하다.
박종익,원효성,류찬수 조선대학교 학생지도연구소 2004 生活指導硏究 Vol.23 No.1
The research of appearance time delay of highest and lower air temperature in a day and diurnal variation of air temperature were carried out and the results are as follow; 1) In respect to diurnal variation of mean temperature. the highest temperature in a day appear at 1500LST and the lowest temperature come out at 0600LST except for autumn. Therefore, it is considered that lowest temperature is observed just before sun rising or immediately after sunset. 2) The reason of appearance time delay of highest temperature is associated with continental degree and oceanic degree. At this point, the farther it is from costal area, the later highest temperature appear. 3) Characteristics of area where the frequency of highest temperature appearance before 1200LST is more than 10 day, is close to coastal line. This is caused by a) land-sea breeze occurrence, b) clear sky under 5.4 cloudiness, c) wet and high humid atmosphere, and d) high percentage of sunshine.