A WRF Modeling Study on the Effects of Land Use Changes on Fog Off the West Coast of the Korean Peninsula

Chang Ki Kim, Seong Soo Yum, Hyun Goo Kim, Yong Heack Kang

Research output: Contribution to journalArticle

Abstract

This study investigates, for the purpose of fog forecasting, the impacts of topography and land use changes on the characteristics of turbulence that directly contribute to the formation and dissipation of fog off the west coast of the Korean Peninsula using the Weather Research and Forecasting model version 3.5.1. During the investigation period, there are 59 coastal ground fog and 29 sea fog events. Local meteorological characteristics of coastal ground fog were similar to those of radiation fog typically seen over the land surface since the reclaimed island was constructed. After the sun rises, relative humidity over the land surface decreases rapidly—within a couple of hours—due to surface heating, which is controlled directly by shortwave radiation. Over the sea surface, however, the sea fog remains, with the relative humidity higher than 95% even during the daytime. For two selected cases, topography and land use were modified to identify turbulence characteristics through numerical modeling. This modification contributed to better forecasting the formation and dissipation of fog by changing characteristics of sensible and latent heat flux in the land surface model and then planetary boundary layer over the reclaimed island.

Original languageEnglish
Pages (from-to)4623-4640
Number of pages18
JournalPure and Applied Geophysics
Volume176
Issue number10
DOIs
Publication statusPublished - 2019 Oct 1

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fog
land use
peninsulas
Fog
coasts
Land use
land use change
Coastal zones
coast
modeling
forecasting
land surface
Topography
humidity
relative humidity
dissipation
Atmospheric humidity
topography
Turbulence
turbulence

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

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abstract = "This study investigates, for the purpose of fog forecasting, the impacts of topography and land use changes on the characteristics of turbulence that directly contribute to the formation and dissipation of fog off the west coast of the Korean Peninsula using the Weather Research and Forecasting model version 3.5.1. During the investigation period, there are 59 coastal ground fog and 29 sea fog events. Local meteorological characteristics of coastal ground fog were similar to those of radiation fog typically seen over the land surface since the reclaimed island was constructed. After the sun rises, relative humidity over the land surface decreases rapidly—within a couple of hours—due to surface heating, which is controlled directly by shortwave radiation. Over the sea surface, however, the sea fog remains, with the relative humidity higher than 95{\%} even during the daytime. For two selected cases, topography and land use were modified to identify turbulence characteristics through numerical modeling. This modification contributed to better forecasting the formation and dissipation of fog by changing characteristics of sensible and latent heat flux in the land surface model and then planetary boundary layer over the reclaimed island.",
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A WRF Modeling Study on the Effects of Land Use Changes on Fog Off the West Coast of the Korean Peninsula. / Kim, Chang Ki; Yum, Seong Soo; Kim, Hyun Goo; Kang, Yong Heack.

In: Pure and Applied Geophysics, Vol. 176, No. 10, 01.10.2019, p. 4623-4640.

Research output: Contribution to journalArticle

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