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http://dx.doi.org/10.14191/Atmos.2022.32.4.307

Analysis on Vertical Structure of Sea Fog in the West Coast of the Korean Peninsula by Using Drone  

Jeon, Hye-Rim (High Impact Weather Research Laboratory, Forecast Research Department, National Institute of Meteorological Sciences)
Park, Mi Eun (High Impact Weather Research Laboratory, Forecast Research Department, National Institute of Meteorological Sciences)
Lee, Seung Hyeop (High Impact Weather Research Laboratory, Forecast Research Department, National Institute of Meteorological Sciences)
Park, Mir (High Impact Weather Research Laboratory, Forecast Research Department, National Institute of Meteorological Sciences)
Lee, Yong Hee (Meteorological Applied Research Department, National Institute of Meteorological Sciences)
Publication Information
Atmosphere / v.32, no.4, 2022 , pp. 307-322 More about this Journal
Abstract
A drone has recently got attention as an instrument for weather observation in lower atmosphere because it can produce the high spatiotemporal resolution weather data even though the weather phenomenon is inaccessible. Sea fog is a weather phenomenon occurred in lower atmosphere, and has observational limitations because it occurs on the sea. Therefore, goal of this study is to analyze the vertical structures about inflow, development and dispersion of sea fog using the high-resolution weather data with the meteorological sensor-equipped drone. This study observed sea fogs in the west coast of the Korean peninsula from March to October 2021 and investigated one sea fog inflowed into the coast on June 8th 2021. θe - qv diagrams (θe: equivalent potential temperature, qv: water vapor ratio) and vertical wind structures were analyzed. At inflow of sea fog, moist adiabatically stable layer was formed in 0-300 m and prevailing wind was switched from south-southwesterly to west-southwesterly under 120 m. Both changes are favorable for sea fog on the location. θe and qv plummeted in a layer 0-183 m. The inflowed sea fog developed from 183 m to 327 m by mixing with ambient atmosphere on top of sea fog. Also, strong mechanical turbulence near ground drove a vertical mixing under stable layer. At dispersion of sea fog, as θe on ground gradually increased, air condition was changed to neutral. Evaporation occurred on both bottom and top in sea fog. These results induced dissipation of sea fog.
Keywords
Drone; Sea fog; Vertical structure; Lower atmosphere; High spatiotemporal resolution;
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