태풍 하부경계층과 대기연직구조 변화 특성

Abstract

The purpose of this study is to analyze the characteristics of the lower boundary layer and atmospheric vertical structure of typhoons that affected the Korean Peninsula in 2015 and 2016 using the observation data of the Boseong standard weather observatory. The typhoon routes created by the Korea Meteorological Administration and weather data of the Korea Local Analysis and Prediction System (KLAPS) confirmed a strong mixing ratio at 850 hPa and a high relative vorticity at 500 hPa. The visible influencing ranges of the typhoons were analyzed using weather satellite images and weather radars, and precipitation data were analyzed using the automatic weather station (AWS) data. When the typhoon approached the Boseong station with the Global Data Assimilation and Prediction System (GDAPS) of the Unified Model, the rising current developed from the upper layer, and the high humidity and high specific humidity areas existed. Furthermore, the characteristics of temperature, humidity, wind direction, wind speed, pressure, equivalent potential temperature, and vertical wind of Boseong Tower were analyzed. The results revealed that the temperature difference between the upper and lower layers became constant as the typhoon approached, and the difference decreased further as the eye of the typhoon became closer. In addition, as the typhoon approached, the wind speed became higher, but the wind rapidly stopped at the eye of the typhoon. The wind direction changed to the center direction according to the movement route of the typhoon. The closer to the center of the typhoon, the lower the atmospheric pressure, and the interval between the equivalent potential temperatures of the upper and lower layers became constant due to the wind. When the typhoon approached, the vertical wind showed a rising current, which was stronger in the lower layer than in the upper layer.