Analysis of climate change characteristics in South Korea during winter based on long-term ground and vertical observation
정형세*† ․ 최희욱** ․ 이부용***
Jeong, Hyeong-Se*† Choi, Hee-Wook** and Lee, Bu-Yong***
This study analyzed temperature, relative humidity, water vapor pressure, and longwave radiation at specific points using 50 years of ground observations from the Korea Meteorological Administration, 9 years of ground observations from the Korea Forest Service, and 43 years of radiosonde observations. The objective was to determine the effects of climate change at altitude. To achieve this, the trend of each meteorological factor was analyzed based on the annual average, showcasing the distribution across various sites in the ground data and the vertical distribution in the radiosonde observation data. The results indicated increasing trends in various indicators over the 50-year period, including average temperature (1.34°C/50yr), maximum temperature (1.73°C/50yr), minimum temperature (0.47°C/50yr), and diurnal variation (1.26°C/50yr). The temperature trend over 9 years showed an increase in maximum temperature, with Gangwon-do and Gyeongsangnam-do showing the largest increase of 0.15°C/yr or more. Of particular significance was the steep upward trend of maximum temperature in high-altitude mountainous regions compared to nearby flat terrain. This trend in maximum temperature is attributed to the decrease in surface albedo due to reduced snow cover. Additionally, long-term radiosonde observations were utilized to analyze the trend of temperature and long-wave radiation in the upper atmosphere. The findings revealed gradual increases in temperature and long-wave radiation toward the upper atmosphere, suggesting that aerosols and anthropogenic carbon emissions influence long-wave radiation and contribute to the increasing temperatures in the upper atmosphere.
Vertical Climate Changes, Temperature, Water Vapor Pressure, Long-Wave Radiation, Trend
1405_08.pdf
