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우리나라 여름철 극한강수량의 최근 레짐이동과 그에 따른 종관특성 변화에 관한 연구
강권민(Kwonmin Kang),최영은(Youngeun Choi) 대한지리학회 2021 대한지리학회지 Vol.56 No.5
본 연구는 우리나라 여름철 (극한)강수량의 변동에서 최근 레짐이동을 탐지하고, 레짐이동이 나타난 원인을 파악하기 위해 종관특성의 변화를 분석하였다. 여름철 강수량은 1970년대 이전까지는 변동이 작았지만 1980년대 이후부터 증가 경향이 뚜렷해졌다. 하지만 최근 10년(2011~2020년) 강수량은 급격히 감소하여 이것이 레짐이동을 발생시킬 정도인지를 확인하기 위해 독립표본 t-검정을 적용하였다. 그 결과 여름철 강수량과 극한강수량의 최근 레짐이동은 2013년인 것으로 나타났다. 2013년은 지금까지 탐지되지 않았던 새로운 레짐이동의 발생시점으로 강수량이 급격하게 감소하는 시점이다. 2013년 이후에 여름철 종관특성 변화도 나타났다. 여름철에 북태평양고기압과 티벳고기압이 강화되어, 우리나라 상공의 기온이 상승하였고, 비습이 상층과 중층에서 유의하게 감소하였다. 이와 더불어 우리나라로 고온건조한 북풍이 탁월해지면서 강수량을 감소시킬 수 있는 조건이 강화되었다. The purpose of this study was to identify the most recent regime shift in summer rainfall, especially extreme rainfall in the Republic of Korea and to examine its causes analyzing the changes of synoptic conditions. Summer rainfall was not much variable, with a relatively narrow range of fluctuation before the 1970s, but has constantly increased by the 1980s. In recent years, a abrupt decrease was detected in it. Student’s t-test has defined the recent regime shift because of a rapid decrease of summer rainfall during the recent 10 years(from 2011 to 2020). As a result, the recent distinct regime shift of summer rainfall and extreme rainfalls was appeared in the year of 2013. The year 2013 was a starting point of the abrupt decrease of summer rainfall, especially extreme rainfalls and this regime shift has never been detected in previous studies. The change of synoptic characteristics was identified after the year of 2013. North Pacific High and Tibetan High were more strengthened and expanded resulting in the increase of temperature from the low levels to high atmospheres after the year 2013. Also, a significant decrease of summer specific humidity from middle to high atmospheres and the northerly wind anomalies with warm and dry conditions might bring the decrease of summer rainfall around the ROK.
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8주간의 스마트폰 기반 순환운동이 남자 직장인의 신체구성, 체력 및 삶의 질에 미치는 영향
강권민(Kang, Kwon-Min),김형준(Kim, Hyoung-Jun),조현석(Cho, Hyun-Seok),이만균(Lee, Man-Gyoon) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.2
This study was designed to examine the effects of 8 weeks of smart phone-based training and traditional group exercise training on body composition, physical fitness, and quality of life (QoL) in male employees. Thirty-nine males, aged 30-40s, were randomly assigned to either smart phone-based training group (SP; n=18) or traditional group exercise training group (GX; n=21). Subjects in SP performed a circuit exercise for 60 minutes/session and three sessions/wk individually utilizing their own smart phone, whereas the subjects in GX performed same exercise with instruction by a personal trainer. Body composition, physical fitness, and indices of QoL were measured and compared between two groups and between two tests. Main results of the study were as follows: 1) Body weight, BMI, percent body fat, fat mass, and WHR decreased significantly in SP, and the variables plus waist circumference decreased significantly in GX. Hip circumference increased significantly in both groups. 2) Left grip strength, plank, push-up, squat, one-leg standing with eyes-closed, and VO2max improved significantly in SP, whereas the variables plus sit-and-reach improved significantly in GX. 3) Regarding QoL, EQ-VAS, CES-D, and PSS improved significantly in SP, whereas EQ-VAS increased significantly in GX. It was concluded that both smart phone-based training and group exercise training were beneficial for improving body composition, physical fitness, and QoL. Group exercise training were more beneficial for improving body composition and physical fitness than smart phone-based training, whereas smart phone-based training were more beneficial for improving QoL than group exercise training.
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