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겨울철 고기압 영향에서 도로 위 기상요소와 노면정보 변화 특성에 관한 연구
김백조,남형구,김선정,김건태,김지완,이용희,Kim, Baek-Jo,Nam, Hyounggu,Kim, Seon-Jeong,Kim, Geon-Tae,Kim, Jiwan,Lee, Yong Hee 한국환경과학회 2022 한국환경과학회지 Vol.31 No.4
Better understanding the mechanism of black ice occurrence on the road in winter is necessary to reduce the socio-economic damage it causes. In this study, intensive observations of road weather elements and surface information under the influence of synoptic high-pressure patterns (22<sup>nd</sup> December, 2020 and 29<sup>th</sup> January, and 25<sup>th</sup> February, 2021) were carried out using a mobile observation vehicle. We found that temperature and road surface temperature change is significantly influenced by observation time, altitude and structure of the road, surrounding terrain, and traffic volume, especially in tunnels and bridges. In addition, even if the spatial distribution of temperature and road surface temperature for the entire observation route is similar, there is a difference between air and road surface temperatures due to the influence of current weather conditions. The observed road temperature, air temperature and air pressure in Nongong Bridge were significantly different to other fixed road weather observation points.
POLICY & ISSUES 기획특집_1 - 기후변화 시대에 대비한 국가기상업무 발전 계획
김백조,Kim, Baek-Jo 환경보전협회 2012 환경정보 Vol.401 No.-
현재 추세대로 온실가스를 계속 배출한다면(RCP8.5) 21세기 말(2070~2099년) 한반도 평균 기온은 $6.0^{\circ}C$ 상승하고 강수량은 20.4% 증가할 것으로 예상된다. 정부에서도 극한의 기상 기후 현상과 사회구조 및 생활양식 변화에 따른 새로운 패러다임에 맞는 혁신적 융합 기상기술 수요에 능동적으로 대응하기 위해 2차 년도 기상업무발전 기본계획을 수립하여 시행하고 있다.
시간별 기온자료를 이용한 한반도 도시화 효과의 특성 연구
김백조(Baek-Jo Kim),김경환(Kyeong-Hoan Kim),오재호(Jai-Ho Oh),백희정(Hee-Jeong Baek),이용근(Yong-Keun Lee) 한국자료분석학회 2000 Journal of the Korean Data Analysis Society Vol.2 No.1
시간별 기온자료를 이용하여 우리나라에서 12개의 주요도시들에 대한 도시화 효과를 계절별 및 월별, 시간별로 조사하였으며, 본 연구에서는 김경환 등(1999)에 제시된 방법에 따라 주요도시와 주변 도시들 간의 기온차이의 최대값과 평균 기온차이 그리고 이들 두 값의 비율를 계산하여 도시화 효과를 검출하였다. In this study, the urbanization effect in Korea on the seasonal, monthly, and hourly scales is investigated by using hourly air temperature data of 12 stations in 1998 with Kim(1999) s detection method which calculates maximum temperature difference (Δ T ˆ (u-s)max), mean temperature difference (Δ T (u-s)), and ratio of these two values between urban and surrounding cities.
김대영(Dae-Young Kim),김연희(Yeon-Hee Kim),김지희(Ji-Hee Kim),김백조(Baek-Jo Kim) 한국신재생에너지학회 2017 신재생에너지 Vol.13 No.2
This study examined numerically the spatial characteristics of the wind resource in Jeju Island using Computational fluid Dynamics (CFD). The initial conditions for the numerical simulation were set to varying wind speeds (3, 5, 13 and 25 [m/s]), which corresponded to wind speeds between the cut-in and cut-out for wind turbine operations, and 12 different wind directions. The result shows that the normalized velocity decreases with height, having similar values between 500 m and 1100 m. The normalized velocity also tended to increase at altitudes higher than 1100 m. The blocking effect by Mt.Halla located on the center of Jeju Island generates a massive wake. The wind speed deficits by the wake effects have a large influence on the lee side of Mt.Halla up to more than 10 km. Overall, the averaged values of normalized velocity and turbulence intensity lie in the range, 0.73~0.77 and 0.078~0.083, respectively. Four regions (Eoseoungsaengak, Seongneol, Keunnokkome and Sanbangsan) with severe wind speed reductions were found, and showed 70%, 55%, 50% and 50% wind speed reductions, respectively.
RCP 시나리오에 근거한 고해상도 미래 풍력 기상자원 분석
임윤정(Yun-Jung Lim),김선애(Seonae Kim),장동호(Dong-Ho Jang),박종철(Jongchul Park),김연희(Yeon-Hee Kim),김백조(Baek-Jo Kim),김맹기(Maeng-Ki Kim) 건국대학교 기후연구소 2016 기후연구 Vol.11 No.1
We developed the Parameter-elevation Regressions on Independent Slopes Model(PRISM)-based Dynamical downscaling Error correction(PRIDE)-Wind speed(WS) model version 3.0 to produce highresolution(1km) grid data at a monthly time scale by using observation and Regional Climate Model(RCM) wind speed data. We consequently produced monthly wind speed grid data during the observation period(2000~2014) and the future period(2021~2100) for Representative Concentration Pathway(RCP) 2 type scenarios by using the PRIDE-WS model. The PRIDE-WS model is constructed by combining the MK(Modified Korean)-PRISM-Wind, the RCM anomaly and Cumulative Density Function(CDF) fitting, basically based on Kim et al.(2016)’s algorithm applied for daily precipitation. The upper level wind(80m altitude) was estimated by Deacon equation using surface wind speed that was produced by the PRIDE-WS model. The results show that the wind speed at the upper level generally increased during the summer season while it decreased during the spring, autumn and winter seasons.
한반도 여름철 일별 강우량에 대한 장기변동과 특이사건의 통계 분석
김백조(Baek-Jo Kim),손건태(Keon Tae Sohn),오재호(Jai-Ho Oh),백지선(Jee-Seon Baik),이용희(Yonghee Lee),백희정(Hee-Jeong Baek) 한국자료분석학회 2000 Journal of the Korean Data Analysis Society Vol.2 No.1
한반도 여름철 강우량의 특이사건의 강도 및 빈도수의 장기간 변동에 대한 분석은 중요한 과학적 관심대상이며 최근 선진 여러 나라에서는 기후변화의 검출을 위하여 평균적인 기후보다는 특이사건에 있어서의 변화에 초점을 둔다. 본 연구에서는 관측기간이 30년 이상인 우리 나라의 22개지점에 대한 여름철 일별 강우량 자료에 요인분석, ARMA 모형추정, AR 회귀모형 분석 및 파엽 분석 등 다양한 통계 분석 기법을 적용하여 한반도 여름철 일별 강우량에 대한 장기변동과 특이사건을 분석하였다. Long-term changes in the frequency and intensity of extreme events of summer rainfall in Korea have been of scientific concern. It has suggested that tests for climatic change should be focus on changes in extreme events rather than on changes in climatic means in some countries. Statistical analysis of the long-term change and extreme events of daily summer rainfall over Korea has been performed using factor analysis, ARMA model estimation, regressive model analysis and wavelet analysis.
김백조 ( Baek Jo Kim ),김경식 ( Kyung Sik Kim ),장기호 ( Ki Ho Chang ),박종길 ( Jong Kil Park ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.3
In this study, the cause of rapid intensity change of typhoon Nakri(0208)in view of point of a trough typhoon interaction Using diagnostic methods was examined based on 6 hourly GDAPS data from 10 to 13 July, 2002. At 0000 UTC 13 July, high PV(Potential Vorticity)region moved southeastward, reaching to the western edge of the Korean peninsula and near typhoon center at surface and there shows an increasing value of EFC(Eddy Momentum Flux Convergence). Also, as the trough and typhoon approach one another at the same time, the vertical shear(850 200 hPa) Increases to more than15 m/s. Thus, it might be coneluced that the trough typhoon interaction made intensified significantly. providing the fact that typhoon Nakri(0208) underwent substantial weakening while moving northward to around Jeju island.