Suk-Hee Ahn

The Characteristics of the Frequency and Damage for Meteorological Disasters in Korea

In this study, 690 meteorological disasters that are recorded on the Disaster Yearbook from NEMA (the National Emergency Management Agency) from 1979 to 2013 have been analyzed to investigate the frequency and damage and to evaluate the influence of meteorological disasters on the Korean economy. As a result, the total damage has so far reached the 28 trillion won, and 19.7 disasters has been occurred and brought 804 billion won damages on average. 41.9 percent of meteorological disasters have been occurred in the 1980s and 19.3 percent in the 2000s, but the corresponding damage cost was opposite: 11.4 percent in the 1980s and 60.6 percent in the 2000s. This result means meteorological disasters are becoming larger. 45.5 percent of the meteorological disasters have been found in summer season which is intensively affected by heavy rains and typhoons. The Disaster Yearbook from NEMA classifies the cause of meteorological disasters into 31 cases, and most of disasters are a single phenomenon (94.9%) than a complex phenomenon (5.1%). It was confirmed that the meteorological disaster trend has been changed in that heavy rain has appeared consistently every year, and the number of typhoons has been decreased compared to the 1980s. Heavy rain took the highest portion (37.8 percent) of total disasters and followed by typhoons (8.7 percent), but the amount of damages of meteorological disasters is more related to typhoons (45.6 percent) than heavy rains (35.4 percent). Both of them accounts for 81 percent of the total damage. Therefore, it is necessary to build intensive prevention measures for two phenomena. The highest loss, approximately 0.9% of GDP, was taken place in 1987. Categorically, typhoon RUSA brought 0.68 percent of GDP loss in 2002 and heavy rains caused 0.45 percent of GDP loss in 1987. This result means that if a high impact meteorological disaster occurs, the ripple effect is enormous as socioeconomic.

The Synoptic Meteorological Characteristics of Spring Rainfall in South Korea during 2008~2012

Spring rainfall events were comprehensively analyzed based on the distribution of precipitation amount and the related synoptic weather between 2008~2012. Forty-eight cases are selected among the rain events of the entire country, and each distribution of the 24-hour accumulated precipitation amount is classified into three types: evenly distributed rain(Type 1), more rain in the southern area and south coast region (Type 2), and more rain in the central region (Type 3), respectively. Type 1 constitutes the largest part(35 cases, 72.9%) with mean precipitation amount of 19.4 mm, and the 17 cases of Type 1 are observed in March. Although Type B and C constitutes small parts (11 cases, 22.9% and 2 cases, 4.2%), respectively. The precipitation amount of these types is greater than 34.5 mm and occurred usually in April. The main synoptic weather patterns affecting precipitation distribution are classified into five patterns according to the pathway of low pressures. The most influential pattern is type 4, and this usually occurs in March, April, and May (Low pressures from the north and the ones from the west and south consecutively affect South Korea, 37.5%). The pattern 3(Low pressures from the south affect South Korea, 25%) happens mostly in April, and the average precipitation is usually greater than 30 mm. This value is relatively higher than the values in any other patterns.

Analysis on Expected Profit for the Effective Operation of Social Cooperative -Focusing on the Education Model of the Meteorological Field

사회적협동조합의 효율적 운영을 위한 기대수익 분석 -기상분야 교육모델을 중심으로 Analysis on Expected Profit for the Effective Operation of Social Cooperative –Focusing on the Education Model of the Meteorological Field 김인겸, 김혜민, 안숙희, 이승욱, 김정윤, 이기광 국립기상과학원 연구기획운영과, 단국대학교 경영학부 In-Gyum Kim(kimig@korea.kr), Hyu-Min Kim(hmkim84@korea.kr), Suk-Hee Ahn(ahnsh@korea.kr), Seung-Wook Lee(antcraft@korea.kr), Jeong-Yun Kim(yjk@kma.go.kr), Ki-Kwang Lee(kiklee@dankook.ac.kr)

Effect of the Rainfall during Typhoon Periods on the Variation of Concentration of Ambient Air Pollutants (PM 10 , NO 2 , CO, SO 2 ) in the Korean Peninsula

This study has analyzed the concentration variation of four air pollutants (, , CO, and ) during the typhoon periods over 10 years (2002~2011). In this study, 10 typhoon events which had rainfalls in Korean Peninsula were selected during the study period. The analysis was performed using the observation data of both the air pollutants and rainfall. In order to examine and compare the concentrations of the air pollutants between normal periods and typhoon periods, we have obtained monthly average concentrations from July to September and daily average concentrations during typhoon periods. For the period from July to September, 34% of the total rainfalls can be explained by typhoons, and the concentration of air pollutants during the typhoon period was lower than the normal period. In addition, the concentration variations of the pollutants during the typhoon period were analyzed according to two categories: differences in the concentrations between the day before and the day of the typhoon (Case 1) and between the day before and after the typhoon (Case 2). The results indicated that the reduction rate of , , CO, and was 30.1%, 17.9%, 11.6%, 9.7% (Case 1) and 22.8%, 21.0%, 9.0%, 8.0% (Case 2), respectively. This result suggested that air quality was significantly improved during the typhoon period than after the typhoon period by the rainfall.