Atmosphere (대기)

Korean Meteorological Society (한국기상학회)
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Occurrence Characteristics of Sea Breeze in the Gangneung Region for 2009~2018

강릉지역 2009~2018년 해풍 발생 특성

  • Hwang, Hyewon (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University) ;
  • Eun, Seung-Hee (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University) ;
  • Kim, Byung-Gon (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University) ;
  • Park, Sang-Jong (Korea Polar Research Institute (KOPRI)) ;
  • Park, Gyun-Myeong (Observation Division, Gangwon Regional Meteorological Office, KMA)
  • 황혜원 (강릉원주대학교 대기환경과학과) ;
  • 은승희 (강릉원주대학교 대기환경과학과) ;
  • 김병곤 (강릉원주대학교 대기환경과학과) ;
  • 박상종 (한국해양과학기술원 부설 극지연구소) ;
  • 박균명 (강원지방기상청 관측과)
  • Received : 2020.05.11
  • Accepted : 2020.07.16
  • Published : 2020.09.30
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Abstract

The Gangneung region has the complicated geographical characteristics being adjacent to East Sea and Taeback mountains, and thus sea breeze could play an important role in local weather in various aspects. This study aims to understand overall characteristics of sea breeze largely based on long-term (2009~2018) ground-based observation data. We also propose a selection criteria of sea breeze occurrence day; 1) daily precipitation is less than 10 mm, 2) surface wind direction is 0~110° (northerly to easterly) for more than 3 hours during the daytime, 3) wind direction is 110~360° for more than 3 hours during the nighttime, and 4) land and sea temperature difference is positive during the daytime, 5) sea and land sea-level pressure difference is more than 0.5 hPa. As a result, a total of 595 days was selected for the past 10 years. The occurrence of sea breeze is the highest in late Spring to early Summer (May to June). The passage time of sea breeze at the inland station (1.6 km farther inland) is one hour later than the coastal station. On the typical sea breeze event of April 12, 2019, the passage speed and duration of sea breeze was 15 km hr-1 and about 9 hours, respectively, with its depth of about 500 m and its head swelling. The current results emphasize the critical role of sea breeze in forecasting surface temperature and wind, and contribute to relieve heat wave especially in summer in the Yeongdong region.

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References

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