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RISS 인기검색어
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- 저자 : 심성보(Sungbo Shim) (검색결과 23 건)
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심성보(Shim, Sungbo),김지선(Kim, Jisun),성현민(Sung, Hyun Min),이재희(Lee, Jae-Hee),권상훈(Kwon, Sang-Hoon),선민아(Sun, Min-Ah),하종철(Ha, Jong-Chul),변영화(Byun, Young-Hwa),김연희(Kim, Yeon-Hee) 한국기후변화학회 2021 한국기후변화학회지 Vol.12 No.2
This study investigates the extreme temperature and precipitation indices as defined by the Expert Team on Climate Change Detection and Indices (ETCCDI). We calculate 14 indices representing extreme climate over East Asia. Here, we utilized the ensemble results of NIMS-KMA (National Institute of Meteorological Sciences and Korea Meteorological Administration) climate models (UKESM1 and K-ACE) for analysis of long-term variation in present-day (1995 ~ 2014) and future (2015 ~ 2100) periods. The spatial distributions of simulated daily maximum and minimum temperatures and daily mean precipitation are comparable to those of ERA5 reanalysis data. Simulated extreme indices are well reproduced in the present-day period, although the NIMS-KMA climate models tend to underestimate annual minimum temperature extremes and overestimate extremes in precipitation intensity. In the future scenarios (SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5), intensity and frequency of warm temperature extremes increased for the late 21st century, but magnitude and number of cold temperature extremes significantly decreased. Changes in extreme precipitation associated with a warming climate are becoming more intense and frequent in Southern China. But the changes in precipitation duration indices tend to have high uncertainty under SSP scenarios.
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심성보(Sungbo Shim),윤영준(Young Jun Yoon),염성수(Seong Soo Yum),차주완(Joo Wan Cha),김종환(Jong Hwan Kim),김준(Jhoon Kim),이방용(Bang-Yong Lee) 한국기상학회 2008 대기 Vol.18 No.4
Aerosol scattering coefficients for three different wavelengths (λ=450,550,700 ㎚) are measured almost continuously by a nephelometer in Seoul for a period of 13 months (February 2007-February 2008), which includes two weeks break in August 2007 for measurements at Daegwallyeong and YoungJongdo. The mean of the daily average scattering coefficients at λ=550 ㎚ is 194.1±144.2 Mm<SUP>-1</SUP> and the minimum and maximum are 14.3 Mm-1 and 998.1 Mm<SUP>-1</SUP>, respectively. The scattering coefficient shows a general increasing trend with atmospheric relative humidity (RH). When the data are classified according to weather conditions, the days with no major weather events show the smallest scattering coefficient and also the lowest RH. Surprisingly haze/fog days show the largest scattering coefficient and Asian dust days comes in second. Although the variation is large within a season, winter shows the largest and autumn shows the smallest scattering coefficient. The average Ångstrom exponent is 1.40±0.32 for the entire Seoul measurement. As expected, Asian dust days show the smallest Ångstrom exponent and haze/fog days are the next, suggesting more efficient hygroscopic growth of aerosols for this weather condition. Aerosol scattering coefficient seems to show better correspondence with CCN concentration rather than total aerosol concentration, which may indicate that CCN active aerosols are also good scattering aerosols.
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CMIP5 자료를 활용한 미래 우리나라의 인위적 영향에 의한 온난화 발현 시기 분석
부경온(Boo, Kyung-On),심성보(Shim, Sungbo),김지은(Kim, Jee-Eun),변영화(Byun, Young-Hwa),조천호(Cho, Chun Ho) 한국기후변화학회 2016 한국기후변화학회지 Vol.7 No.4
Significant warming by anthropogenic influences over Korea is analyzed using CMIP5 projections (monthly mean, maximum and minimum temperatures) from RCP 8.5, 4.5, and 2.6 scenarios. Time of emergence (TOE) in JJA and DJF is chosen as the year when the magnitude of warming against the natural climate variability satisfies S/N>2 in 80% of the models in this study. Significant emergence in JJA is expected to appear in 2030s in three RCP scenarios, earlier than TOE in DJF. In DJF, TOE is expected to be 2040s in RCP 8.5 and is delayed in 2060s, 2080s in RCP 4.5, 2.6, respectively. Later emergence in low emission scenarios implies an importance of climate change mitigation consistent with previous studies. Maximum and minimum temperatures show similar results to the case of mean temperature. ToE is found to be affected by the amplitude of natural variability by season, variables and model spread, which requires further understanding.
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문용주 ( Yongju Moon ),심성보 ( Sungbo Shim ),박두산 ( Tusan Park ) 한국농업기계학회 2017 한국농업기계학회 학술발표논문집 Vol.22 No.2
국내 과채음료 시장은 2014년 9,634억원 수준이며, 수요가 점점 증가하는 추세이다. 농업의 6차산업화 정책으로 인해 상대적으로 창업이 수월한 과채음료 제조 및 가공분야로 농업인의 창업이 증가하고 있다. 산업용 착즙기는 단순 가압식, 스크류 가압식, 벨트 프레스식이다. 하지만 이러한 방식들은 낮은 착즙율, 긴 착즙 소요시간, 높은 고형분 발생율 등의 문제점이 있다. 그래서 이러한 문제점을 보완한 Decanter Centrifuge, Saito separator 방식이 있지만 1억원을 호가한다. 이들 문제점을 해소할 수 있는 저가형 원심분리형 착즙기를 개발하고자 한다. 원심분리형 착즙기는 분쇄된 과일 슬러리를 원심력으로 착즙액과 슬러지로 분리하는 형식으로 중심축으로 회전하는 바스켓부, 착즙액 수거부와 슬러지 배출부로 구성되어 있다. 바스켓부는 상부가 개방되고 경사진 벽면이 타공된 망으로 구성되는데, 착즙을 마친 슬러지가 경사면을 따라 비산하여 배출된다. 착즙율과 슬러지 배출율은 착즙 대상 물성에 따라 회전망체 벽면의 경사 각도와 회전 속도에 의해 결정된다. 회전망체 벽면의 각도와 회전 속도를 결정하기 위해 모형 착즙기를 제작하였다. 바스켓부는 55, 60, 65°의 경사 벽면을 갖도록 설계하고 이를 3D 프린팅하여 제작하였다. 모형 착즙기를 통해 분쇄된 사과를 대상으로 바스켓부 벽면의 경사와 회전 속도에 따른 착즙율을 실험을 통해 분석하였다.
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RCP 시나리오에 따른 미래 동아시아 지표복사에너지와 운량 변화 전망
이철(Lee, Cheol),부경온(Boo, Kyung-On),심성보(Shim, Sungbo),변영화(Byun, Youngwha) 한국기후변화학회 2016 한국기후변화학회지 Vol.7 No.4
In this study, we examine future changes in surface radiation associated with cloud amount and aerosol emission over East Asia. Data in this study is HadGEM2-CC (Hadley Centre Global Environmental Model version 2, Carbon Cycle) simulations of the Representative Concentration Pathways (RCPs) 2.6/4.5/8.5. Results show that temperature and precipitation increase with rising of the atmosphere CO₂. At the end of 21<SUP>st</SUP> century (2070∼2099) relative to the end of 20<SUP>st</SUP> century (1981∼2005), changes in temperature and precipitation rate are expected to increase by +1.85 ℃/+6.6% for RCP2.6, +3.09℃/+8.5% for RCP4.5, +5.49℃/10% for RCP8.5. The warming results from increasing Net Down Surface Long Wave Radiation Flux (LW) and Net Down Surface Short Wave Radiation Flux (SW) as well. SW change increases mainly from reduced total Aerosol Optical Depth (AOD) and low-level cloud amount. LW change is associated with increasing of atmospheric CO₂ and total cloud amount, since increasing cloud amounts are related to absorb LW radiation and remit the energy toward the surface. The enhancement of precipitation is attributed by increasing of high-level cloud amount. Such climate conditions are favorable for vegetation growth and extension. Expansion of C3 grass and shrub is distinct over East Asia, inducing large latent heat flux increment.
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