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http://dx.doi.org/10.14191/Atmos.2021.31.4.461

Observation and Understanding of Snowfall Characteristics in the Yeongdong Region  

Kim, Byung-Gon (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University)
Kim, Mi-Gyeong (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University)
Kwon, Tae-Young (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University)
Park, Gyun-Myung (Observation.Forecast Division, Gangwon Regional Meteorological Office)
Han, Yun-Deok (Observation.Forecast Division, Gangwon Regional Meteorological Office)
Kim, Seung-Bum (High Impact Weather Research Department, National Institute of Meteorological Sciences)
Chang, Ki-Ho (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Publication Information
Atmosphere / v.31, no.4, 2021 , pp. 461-472 More about this Journal
Abstract
Yeongdong has frequently suffered from severe snowstorms, which generally give rise to societal and economic damages to the region in winter. In order to understand its mechanism, there has been a long-term measurement campaign, based on the rawinsonde measurements for every snowfall event at Gangneung since 2014. The previous observations showed that a typical heavy snowfall is generally accompanied with northerly or northeasterly flow below the snow clouds, generated by cold air outbreak over the relatively warmer East Sea. An intensive and multi-institutional measurement campaign has been launched in 2019 mainly in collaboration with Gangwon Regional Office of Meteorology and National Institute of Meteorological Studies of Korean Meteorological Administration, with a special emphasis on winter snowfall and spring windstorm altogether. The experiment spanned largely from February to April with comprehensive measurements of frequent rawinsonde measurements at a super site (Gangneung) with continuous remote sensings of wind profiler, microwave radiometers and weather radar etc. Additional measurements were added to the campaign, such as aircraft dropsonde measurements and shipboard rawinsonde soundings. One of the fruitful outcomes is, so far, to identify a couple of cold air damming occurrences, featuring lowest temperature below 1 km, which hamper the convergence zone and snow clouds from penetrating inland, and eventually make it harder to forecast snowfall in terms of its location and timing. This kind of comprehensive observation campaign with continuous remote sensings and intensive additional measurement platforms should be conducted to understand various orographic precipitation in the complex terrain like Yeongdong.
Keywords
Rawinsonde; snowfall; northeasterly; ESSAY; Yeongdong;
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