• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.761-765
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• 2005

원격탐사 기법은 식생 및 토지 이용과 같은 지형조건과 관련된 증발산량을 산정하기 위한 하나의 수단으로 효과적으로 이용될 수 있다. 지표면에서 발생되는 증발산량을 지배하는 인자는 기온, 습도, 바람, 일사량 및 토양조건 등 매우 복잡하게 구성된다. 식생은 그 지점의 증발산량에 영향을 주고 있으며, 증발산량을 지배하는 복잡한 인자는 식생의 성장조건에 직접적으로 영향을 미친다. 결국 증발산량과 식생조건 사이에는 강한 상관관계가 성립할 수 있음을 예상할 수 있다. 비교적 넓은 지점에 대한 식생상태의 파악을 위해서는 NOAA/AVHRR 자료가 효과적으로 이용될 수 있으며, 이로부터 얻어지는 식생지수(NDVI)를 이용함으로서 증발산량과 NDVI 사이의 강한 상관관계를 생각할 수 있다. 입력자료로 이용되는 기상자료가 많을수록 자료의 획득 및 처리에 많은 시간이 요구되므로 본 연구에서는 기상자료 중 비교적 쉽고 정확한 값을 얻을 수 있는 기온자료만을 채택하여 분석 시의 번거로움을 최소화하였다. 본 연구에서는 위성자료와 기상자료 중 가장 획득이 용이한 기온자료를 조합하는 간편한 방법에 의한 실제증발산량 산정방법을 제안한다.

• Korean Journal of Agricultural and Forest Meteorology
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• v.20 no.4
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• pp.376-385
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• 2018

To estimate the hourly temperature distribution due to solar radiation during the day, on slope in complex terrain, an empirical formula was developed including the hourly deviation in the observed temperature following solar radiation deviation, at weather stations on the east-facing and west-facing slopes. The solar radiation effect was simulated using the empirical formula to estimate hourly temperature at 11 weather observation sites in mountainous agricultural areas, and the result was verified for the period from January 2015 to December 2017. When the estimated temperature was compared with the control, only considering temperature lapse rate, it was found that the tendency to underestimate the temperature from 9 am to 3 pm was reduced with the use of an empirical formula in the form of linear expression; consequently, the estimation error was reduced as well. However, for the time from 5 pm to 6 pm, the estimation error was smaller when a hyperbolic equation drawn from the deviation in solar radiation on the slope, which was calculated based on geometric conditions, was used instead of observed values. The reliability of estimating the daytime temperature at 3 pm was compared with existing estimation model proposed in other studies; the estimation error could be mitigated up to an ME (mean error) of $-0.28^{\circ}C$ and RMSE (root mean square error) of $1.29^{\circ}C$ compared to the estimation error in previous models (ME $-1.20^{\circ}C$, RMSE $2.01^{\circ}C$).

• Korean Journal of Remote Sensing
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• v.36 no.6_1
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• pp.1435-1447
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• 2020

The seasonal variations in weather parameters can significantly affect the atmospheric transmission characteristics. Herein, we propose a novel augmented multiple regression algorithm for the accurate estimation of atmospheric transmittance and solar irradiance over highly localized areas. The algorithm employs 1) adaptive atmospheric model selection using measured meteorological data and 2) multiple linear regression computation augmented with the conventional application of MODerate resolution atmospheric TRANsmission (MODTRAN). In this study, the proposed algorithm was employed to estimate the solar irradiance over Taean coastal area using the 2018 clear days' meteorological data of the area, and the results were compared with the measurement data. The difference between the measured and computed solar irradiance significantly improved from 89.27 ± 48.08σ W/㎡ (with standard MODTRAN) to 21.35 ± 16.54σ W/㎡ (with augmented multiple regression algorithm). The novel method proposed herein can be a useful tool for the accurate estimation of solar irradiance and atmospheric transmission characteristics of highly localized areas with various weather conditions; it can also be used to correct remotely sensed atmospheric data of such areas.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2005.05a
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• pp.193-195
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• 2005

광화학측정이 이루어진 기간 중 일사량이 강한 날에 관측 오존의 농도와 광화학 모델의 광화학 정류상태로 추정된 오존의 농도는 아주 밀접한 근접성을 보였다. 광정류 상태로부터의 이탈 정도에 영향을 미치는 인자로는 측정 지역 근처에서의 지역적 NO$_{2}$ 생성원의 존재, 지역적 NO 또는 오존의 소멸, 비 정류상태 조건, 또는 측정의 오차 등에 기인한 것으로 추정된다. 오존의 생성 속도에 가장 크게 영향을 주는 화학반응은 NO와 HO$_{2}$의 화학반응으로 나타났다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.75-76
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• 2001

대류권오존의 기원은 크게 두 부분으로 나누어진다. 첫 번째, 오존의 전구물질인 CO, NOx, 그리고 non-methan hydrocarbon이 빛과 작용하여 형성되어지는데, 이러한 조건에 부합되는 시기는 태양의 일사량이 풍부하고 온도가 높은 5∼9월경이다. 두 번째는, 제트기류가 위치하는 곳에서 대기의 섭동에 의해 대류권계면 접힘 (tropopause folding) 현상 발생시 오존 전량의 90%가 존재하는 성층권에서 다량의 오존이 대류권으로 유입되기도 한다 (Fishman et al., 1979; Uccellini et al., 1985). (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.11a
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• pp.286-287
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• 2002

정부와 민간이 대단위 택지 개발사업을 추진하면서 그 지역의 기후조건 및 자연환경 등을 충분히 고려하지 못하고 획일적이고 평면적인 단지를 조성함으로써 대도시의 대단위 아파트 지역에서 여름철, 강한 일사량과 약한 풍속으로 인한 일시적인 역전현상 및 열섬효과로 인하여 주변지역에서 배출된 대기오염물질들의 확산을 저해하는 요인이 되고 있다. 또한 대단위 아파트 단지조성 시에 도로와 아파트 대형건물의 배치 등 기류이동을 고려하지 않고 건설하므로 주위의 오염물질이 풍향 및 풍속에 따라 단지 내에 정체하여 건물의 실내로 들어가 또 다른 실내오염을 야기 시키게 된다. (중략)

• Proceedings of the Plant Resources Society of Korea Conference
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• 2003.04a
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• pp.87-89
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• 2003

벼의 생육과 수량에는 토양과 생물환경 못지 않게 기상환경도 중요하다. 기상환경 중에서도 기온과 일조시수의 영향은 매우 커서 이에 대한 연구가 많이 이루어 졌다. 따라서 본 시험에서는 여수지역에서의 10년간 기상조건과 벼의 수량성을 비교하였던바 생육 초기의 영양생장기에 비하여 생육후기의 생식 생장기에서의 높은 고온과 많은 일조시간(일사량)은 증수되는 경향이 었다.

• Land and Housing Review
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• v.13 no.1
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• pp.113-129
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• 2022

A building's eco-friendliness is directly related to various values including the life cycle cost of a building. However, the conventional architectural design method has a limitation in that it cannot create an optimized case according to the surrounding environmental conditions. Therefore, the purpose of this research is to present a design assistance tool that can review planning cases optimized for the environmental conditions of the building site in the planning stage of architectural production. To achieve the purpose of the study, an algorithm for realizing 3D modeling of the region and analysis of the solar environment was produced based on the site contours, building, and road information from the digital topographic map provided by the National Geographic Information Institute. To examine the validity of the developed algorithm, a comparative experiment was conducted targeting the elevation direction of the existing building. As a result, it was found that the optimal elevation direction selected by the algorithm can receive higher insolation compared to the front facade of the main building.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.8
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• pp.2963-2967
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• 2010

In this paper, we have predicted and analyzed the MSX 60 photovoltaic module's output according to the temperature and solar radiation conditions by MATLAB program. 2 and 3-dimensional I-V curves of the PV module considered temperature, series resistance and solar radiation variation. are shown. Also, calculated PV's electrical parameters are Isc = 3.8 A, Voc = 21 V, Pmax = 60 W. Compared with the actual photovoltaic module's data, these simulated results agreed well with within the manufacturer's maximum error range 3%.

• Journal of Bio-Environment Control
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• v.25 no.4
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• pp.308-319
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• 2016

In order to set the outdoor weather conditions to be applied to the design standard of the greenhouse heating and cooling system, outdoor air temperature and heating degree-hour for heating design, dry bulb temperature, wet bulb temperature and solar irradiance for cooling design were analyzed and presented. For every region in Korea, we used thirty years from 1981 to 2010 hourly weather data for analysis, which is the current standard of climatological normal provided by KMA. Since the use of standard weather data is limited, design weather conditions were obtained using the entire weather data for 30 years, and the average value of the entire data period was presented as a design standard. The design weather data with exceedance probability of 1, 2.5, and 5% were analyzed by the TAC method, and we presented the distribution map with exceedance probability of 1% for heating and 2.5% for cooling which are recommended by design standards. The changes of maximum heating load, seasonal heating load and maximum cooling load were examined by regions, exceedance probabilities, and setpoint temperatures. The proposed outdoor design conditions can be used not only directly for the greenhouse heating and cooling design, but also for the reinforcement of heating and cooling facilities and the establishment of energy saving measures. Recently, due to the climate change, sweltering heat in summer and abnormal temperature in winter are occurring frequently, so we need to analyze weather data periodically and revise the design standard at least every 10 years cycle.