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http://dx.doi.org/10.5532/KJAFM.2020.22.4.299

An Analysis of Water Vapor Pressure to Simulate the Relative Humidity in Rural and Mountainous Regions  

Kim, Soo-ock (STA Corporation Co., Ltd.)
Hwang, Kyu-Hong (STA Corporation Co., Ltd.)
Hong, Ki-Young (STA Corporation Co., Ltd.)
Seo, Hee-Chul (STA Corporation Co., Ltd.)
Bang, Ha-Neul (STA Corporation Co., Ltd.)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.22, no.4, 2020 , pp. 299-311 More about this Journal
Abstract
This paper analyzes the distribution of water vapor pressure and relative humidity in complex terrains by collecting weather observation data at 6 locations in the valley in Jungdae-ri, Ganjeon-myeon, Gurye-gun, Jeolla South Province and 14 locations in Akyang-myeon, Hadong-gun, Gyeongsang South Province, which form a single drainage basin in rural and mountainous regions. Previously estimated water vapor pressure used in the early warning system for agrometeorological hazard and actual water vapor pressure arrived at using the temperature and humidity that were measured at the highest density (1.5 m above ground) at every hour in the valley of Jungdae-ri between 19 December 2014 and 23 November 2015 and in the valley of Akyang between 15 August 2012 and 18 August 2013 were compared. The altitude-specific gradient of the observed water vapor pressure varied with different hours of the day and the difference in water vapor pressure between high and low altitudes increased in the night. The hourly variations in the water vapor pressure in the weather stations of the valley of Akyang with various topographic and ground conditions were caused by factors other than altitude. From the observed data of the study area, a coefficient that adj usts the variation in the water vapor pressure according to the specific difference in altitude and estimates it closer to the actual measured level was derived. Relative humidity was simulated as water vapor pressure estimated against the saturated water vapor pressure, thus, confirming that errors were further reduced using the derived coefficient than with the previous method that was used in the early warning system.
Keywords
Relative humidity; Water vapor pressure; Farm-scale; Early warning system; Complex terrain;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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