Characteristics of Springtime Temperature Within Mt. Youngmun Valley

Abstract

This paper reviews the results of recent observations in the Yeonsuri valley of Mt. Youngmun during springtime (March to May) in 2012. Automated weather stations were installed at twelve sites in the valley to measure temperature and 2, 3 dimensional wind. We examined temporal and spatial characteristics of temperatures and wind data. The Yeonsuri valley springtime average temperature lapse rate between the top and bottom of the entire period is -0.44 o C/100 m. It can be changed by the synoptic weather conditions, the lapse rates is greatest in order of clear days (-0.48 o C/100 m), rainy (-0.41 o C/100 m) and cloudy days (-0.40 o C/100 m). In the night, the temperature inversion layer (thermal belt) and the cold pool are formed within the valley. In addition, we measured temperature and wind distribution from the bottom to 3.5 m, the cold layers existed up to 1.5 m, which were affected by ground mixed layer. The results will provide useful guidance on agricultural practices as well as model simulations.