영동 지역 한기 축적과 강설의 연관성 분석
Analysis of the Relationship of Cold Air Damming with Snowfall in the Yeongdong Region
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초록
The Yeongdong region is frequently vulnerable to heavy snowfall in winter in terms of societal and economical damages. By virtue of a lot of previous efforts, snowfall forecast has been significantly improved, but the performance of light snowfall forecast is still poor since it is very conducive to synoptic and mesoscale interactions, largely attributable to Taeback mountains and East Sea effects. An intensive observation has been made in cooperation with Gangwon Regional Meteorological Office and National Institute of Meteorological Studies in winter seasons since 2019. Two distinctive Cold Air Damming (CAD) events (14 February 2019 and 6 February 2020) were observed for two years when the snowfall forecast was wrong specifically in its location and timing. For two CAD events, lower-level temperature below 2 km ranged to lowest limit in comparisons to those of the previous 6-years (2014~2019) rawinsonde soundings, along with the stronger inversion strength (> 2.0oC) and thicker inversion depth (> 700 m). Further, the northwesterly was predominant within the CAD layer, whereas the weak easterly wind was exhibited above the CAD layer. For the CAD events, strong cold air accumulation along the east side of Taeback Mountains appeared to prevent snow cloud and convergence zone from penetrating into the Yeongdong region. We need to investigate the influence of CAD on snowfall in the Yeongdong region using continuous intensive observation and modeling studies altogether. In addition, the effect of synoptic and mesoscale interactions on snowfall, such as nighttime drainage wind and land breeze, should be also examined.
Abstract
The Yeongdong region is frequently vulnerable to heavy snowfall in winter in terms of societal and economical damages. By virtue of a lot of previous efforts, snowfall forecast has been significantly improved, but the performance of light snowfall forecast is still poor since it is very conducive to synoptic and mesoscale interactions, largely attributable to Taeback mountains and East Sea effects. An intensive observation has been made in cooperation with Gangwon Regional Meteorological Office and National Institute of Meteorological Studies in winter seasons since 2019. Two distinctive Cold Air Damming (CAD) events (14 February 2019 and 6 February 2020) were observed for two years when the snowfall forecast was wrong specifically in its location and timing. For two CAD events, lower-level temperature below 2 km ranged to lowest limit in comparisons to those of the previous 6-years (2014~2019) rawinsonde soundings, along with the stronger inversion strength (> 2.0oC) and thicker inversion depth (> 700 m). Further, the northwesterly was predominant within the CAD layer, whereas the weak easterly wind was exhibited above the CAD layer. For the CAD events, strong cold air accumulation along the east side of Taeback Mountains appeared to prevent snow cloud and convergence zone from penetrating into the Yeongdong region. We need to investigate the influence of CAD on snowfall in the Yeongdong region using continuous intensive observation and modeling studies altogether. In addition, the effect of synoptic and mesoscale interactions on snowfall, such as nighttime drainage wind and land breeze, should be also examined.
참고문헌 (17)
- Bailey, C. M., "An objective climatology, classification scheme, and assessment of sensible weather impacts for Appalachian cold-air damming", Mon. Wea. Rev., 18, pp.641~661 (2003)
- Bell, G. D., "Applachian cold-air damming", Mon. Wea. Rev., 116, pp.137~161 (1988)
- Dunn, L., "Cold air damming by the front range of the Colorado Rockies and its relationship to locally heavy snows", Wea. Forecasting, 2, pp.177~189 (1987)
- 김지언, "영동대설 사례와 관련된 동해상의 현열속과 잠열속 분포 특성", Ocean and Polar Research, 27(3), pp.237~250 (2005), 한국해양과학기술원
- Winter forecast guidance (Why? How!), "KMA", Korea Meteorological Administration, 277~ (2019)
- 고아름, "겨울철 ESSAY (Experiment on Snow Storms At Yeongdong) 기간 동안 수증기량과 강수량의 연관성 분석", 대기, 26(1), pp.19~33 (2016), 한국기상학회
- Development of observation and forecast technology for easterly snowfall and strong windstorm in the Yeongdong region, "Kwon, T. -Y.", Gangwon Regional Office of Meteorology, 144~ (2020)
- Lee, H., "The governing factors for heavy snowfalls in Youngdong area", J. Korean Meteor. Soc., 30, pp.197~218 (1994)
- 이재규, "영동해안 대설사례의 수치모의 연구", Asia-Pacific Journal of Atmospheric Sciences, 37(1), pp.1~12 (2001), 한국기상학회
- 이재규, "북동 기류와 관련된 영동해안 지역의 대설 사례에 대한 WRF수치모의 연구", 대기, 18(4), pp.339~354 (2008), 한국기상학회
- Jae-Gyoo Lee, "A study on a snowband associated with a coastal front and cold-air damming event of 3–4 February 1998 along the eastern coast of the Korean Peninsula", Advances in Atmospheric Sciences, 30(2), pp.263~279 (2013), Springer Science and Business Media LLC[DOI]
- 이재규, "A Trajectory Study on the Heavy Snowfall Phenomenon in Yeongdong Region of Korea", Asia-Pacific Journal of Atmospheric Sciences, 47(1), pp.45~62 (2011), 한국기상학회
- 이진화, "영동지역 대설 사례의 대기 하층 안정도 분석", 대기, 22(2), pp.209~219 (2012), 한국기상학회[DOI]
- 남형구, "Characteristics of Easterly-Induced Snowfall in Yeongdong and Its Relationship to Air-Sea Temperature Difference", Asia-Pacific Journal of Atmospheric Sciences, 50(4), pp.541~552 (2014), 한국기상학회
- 남형구, "관측과 모델 자료를 활용한 겨울철 영동지역 한기 축적(Yeongdong Cold Air Damming; YCAD)의 공간 규모 분석", 대기, 30(2), pp.183~193 (2020), 한국기상학회[DOI]
- 박지훈, "영동과 영남 지역에서 발생한 두 대설의 발달 메커니즘 비교", 대기, 19(1), pp.9~36 (2009), 한국기상학회
- Seo, E. -K., "A case study of the heavy snowfalls occurred in the Korean peninsula from 29 January to 1 February 1990", Atmosphere, 27, pp.165~179 (1991)