| Year of Publication | 2015 | Division | Applied Meteorology Research Division |
|---|---|---|---|
| Title | Atmospheric Characteristics of Fog Incidents at the Nakdong River : Case Study in Gangjeong-Goryeong Weir | ||
| Author | PARK JUN SANG | ||
| Coauthor | 임윤규, 김규랑, 조창범, 장준영, 강미선, 김백조 | ||
| ISBN(ISSN) | 1225-4517 | Name of Journal | 한국환경과학회지 |
| Category (International/Domestic) | 국내 | Vol. No. | 24 |
| Research Project Title | 응용기상기술개발연구 (2015년) | Publication Date | 2015-05-31 |
| Keywords | Evaporation fog, Fog mechanism, Weir | ||
Visibility and Automatic Weather System(AWS) data near Nakdong river were analyzed to characterize fog formation
during 2012-2013. The temperature was lower than its nearby city – Daegu, whereas the humidity was higher than the city.
157 fog events were observed in total during the 2 year period. About 65% of the events occurred in fall (September, October,
and November) followed by winter, summer, and spring. 94 early morning fog events of longer than 30 minutes occurred
when south westerly wind speed was lower than 2 m/s. During these events, the water temperature was highest followed by
soil surface and air temperatures due to the advection of cold and humid air from nearby hill. The observed fog events were
categorized using a fog-type classification algorithm, which used surface cooling, wind speed threshold, rate of change of air
temperature and dew point temperature. As a result, frontal fog observed 6 times, radiation 4, advection 13, and evaporation
66. The evaporation fog in the study area lasted longer than other reports. It is due to the interactions of cold air drainage flow
and warm surface in addition to the evaporation from the water surface. In particular, more than 60% of the evaporation fog
events were accompanied with cold air flows over the wet and warm surface. Therefore, it is needed for the identification of
the inland fog mechanism to evaluate the impacts of nearby topography and land cover as well as water body.
during 2012-2013. The temperature was lower than its nearby city – Daegu, whereas the humidity was higher than the city.
157 fog events were observed in total during the 2 year period. About 65% of the events occurred in fall (September, October,
and November) followed by winter, summer, and spring. 94 early morning fog events of longer than 30 minutes occurred
when south westerly wind speed was lower than 2 m/s. During these events, the water temperature was highest followed by
soil surface and air temperatures due to the advection of cold and humid air from nearby hill. The observed fog events were
categorized using a fog-type classification algorithm, which used surface cooling, wind speed threshold, rate of change of air
temperature and dew point temperature. As a result, frontal fog observed 6 times, radiation 4, advection 13, and evaporation
66. The evaporation fog in the study area lasted longer than other reports. It is due to the interactions of cold air drainage flow
and warm surface in addition to the evaporation from the water surface. In particular, more than 60% of the evaporation fog
events were accompanied with cold air flows over the wet and warm surface. Therefore, it is needed for the identification of
the inland fog mechanism to evaluate the impacts of nearby topography and land cover as well as water body.
