드론을 활용한 한반도 서해 연안의 해무 연직구조 분석
Analysis on Vertical Structure of Sea Fog in the West Coast of the Korean Peninsula by Using Drone
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초록
A drone has recently got attention as an instrument for weather observation in loweratmosphere because it can produce the high spatiotemporal resolution weather data even thoughthe weather phenomenon is inaccessible. Sea fog is a weather phenomenon occurred in loweratmosphere, and has observational limitations because it occurs on the sea. Therefore, goal ofthis study is to analyze the vertical structures about inflow, development and dispersion of seafog using the high-resolution weather data with the meteorological sensor-equipped drone. Thisstudy observed sea fogs in the west coast of the Korean peninsula from March to October 2021and 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 wereanalyzed. At inflow of sea fog, moist adiabatically stable layer was formed in 0–300 m andprevailing 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 0–183m. The inflowed sea fog developed from 183 m to 327 m by mixing with ambient atmosphereon top of sea fog. Also, strong mechanical turbulence near ground drove a vertical mixing understable layer. At dispersion of sea fog, as θe on ground gradually increased, air conditionwas changed to neutral. Evaporation occurred on both bottom and top in sea fog. These resultsinduced dissipation of sea fog.
Abstract
A drone has recently got attention as an instrument for weather observation in loweratmosphere because it can produce the high spatiotemporal resolution weather data even thoughthe weather phenomenon is inaccessible. Sea fog is a weather phenomenon occurred in loweratmosphere, and has observational limitations because it occurs on the sea. Therefore, goal ofthis study is to analyze the vertical structures about inflow, development and dispersion of seafog using the high-resolution weather data with the meteorological sensor-equipped drone. Thisstudy observed sea fogs in the west coast of the Korean peninsula from March to October 2021and 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 wereanalyzed. At inflow of sea fog, moist adiabatically stable layer was formed in 0–300 m andprevailing 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 0–183m. The inflowed sea fog developed from 183 m to 327 m by mixing with ambient atmosphereon top of sea fog. Also, strong mechanical turbulence near ground drove a vertical mixing understable layer. At dispersion of sea fog, as θe on ground gradually increased, air conditionwas changed to neutral. Evaporation occurred on both bottom and top in sea fog. These resultsinduced dissipation of sea fog.
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