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RISS 인기검색어
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- 저자 : 허지나 ( Ji Na Hur ) (검색결과 2 건)
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수치예보모형을 이용한 역학적 규모축소 기법을 통한 농업기후지수 모사
안중배 ( Joong Bae Ahn ),허지나 ( Ji Na Hur ),심교문 ( Kyo Moon Shim ) 한국농림기상학회 2010 한국농림기상학회지 Vol.12 No.1
A regional climate model (RCM) can be a powerful tool to enhance spatial resolution of climate and weather information (IPCC, 2001). In this study we conducted dynamical downscaling using Weather Research and Forecasting Model (WRF) as a RCM in order to obtain high resolution regional agroclimate indices over the Korean Peninsula. For the purpose of obtaining detailed high resolution agroclimate indices, we first reproduced regional weather for the period of March to June, 2002-2008 with dynamic downscaling method under given lateral boundary conditions from NCEP/NCAR (National Centers for Environmental Prediction/National Center for Atmospheric Research) reanalysis data. Normally, numerical model results have shown biases against observational results due to the uncertainties in the modelis initial conditions, physical parameterizations and our physical understanding on nature. Hence in this study, by employing a statistical method, the systematic bias in the modelis results was estimated and corrected for better reproduction of climate on high resolution. As a result of the correction, the systematic bias of the model was properly corrected and the overall spatial patterns in the simulation were well reproduced, resulting in more fine-resolution climatic structures. Based on these results, the fine-resolution agro-climate indices were estimated and presented. Compared with the indices derived from observation, the simulated indices reproduced the major and detailed spatial distributions. Our research shows a possibility to simulate regional climate on high resolution and agro-climate indices by using a proper downscaling method with a dynamical weather forecast model and a statistical correction method to minimize the model bias.
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강화지역의 기후특성 분석을 통한 강화약쑥의 생육 환경 연구
안중배 ( Joong Bae Ahn ),허지나 ( Ji Na Hur ),정해곤 ( Hae Gon Jung ),박종호 ( Jong Ho Park ) 한국농림기상학회 2012 한국농림기상학회지 Vol.14 No.2
Eupatilin, one of representative medical components of mugwort, can be efficiently extracted from the ``Gangwha Sajabalssuk``. The Eupatilin content may depend on environmental factors such as soil and regional climate in addition to a genetic factor and Gangwha region has a profitable environmental condition for the mugwort growth. In this study, the climatological characteristics of Gangwha was analyzed in order to find the environmental condition of mugwort containing high Eupatilin in term of atmospheric, oceanographic and land variables. The climate of Gangwha is characterized by the relatively low daily temperature and large diurnal variation with plenty of solar radiation, long sunshine duration and less cloudiness. According to our correlation analysis, the long sunshine duration and the large diurnal temperature variation are highly correlated with the Eupatilin contents. The result implies that Gangwha has the favorable conditions for the cultivation and the habitat of the high-Eupatilin concentrated mugwort. Because of the sea surrounding Gangwha Island with low salinity and moderate wind, the salt contained in sea breeze is relatively low compared to other regions. Furthermore, Gangwha has clean atmospheric environment compared to other regions because the concentrations of toxic gases harmful to crop growth such as nitrogen dioxide (NO2), sulfite gas (SO2) and fine dust (PM- 10) are lower in the air. The ozone (O3) concentration is moderate and within the level of natural production. It is also found that moderately coarse texture or fine loamy soils known as good for water drainage and for the growth and cultivation of the ``Gangwha-mugwort`` are distributed throughout the areas around mountainous districts in Gangwha, coinciding with those of mugwort habitat.
ScienceON
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