• Proceedings of the Korea Water Resources Association Conference
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• 2010.05a
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• pp.258-262
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• 2010

지역기후모델 RegCM3 이용하여 역학적 상세화 이중둥지격자체계를 구축하고 관측, ECHO-G/S의 20C3M 및 SRES A2 시나리오를 이용하여 동아시아(60km 분해능)와 한반도(20km 분해능)에 대한 현재 및 미래 (1971-2100, 130년)의 기후변화 시나리오 자료를 생산하여 구축하였다. 현재 1971-2000년 기간 동안 상세화된 기온은 관측에 대해 저온 편의와 여름 강수는 건조 편의가 나타나는 계통오차가 있으나, 상세화된 자료는 한반도의 지형적 특성이 잘 반영되었고 관측의 월별, 계절별 변동성을 유사하게 모의하는 등 재분석 자료를 성공적으로 상세화한 것으로 판단된다. 미래 100년(2001-2100년)에 대해 전반기(2021-2050) 및 후반기(2070-2099)의 시나리오기후변동을 분석한 결과, 상세화된 지역별, 계절별, 연도별 기온 상승의 시 공간적 분포를 잘 보여주며, 기온상승(전반기: 동아시아지역~$1.8^{\circ}C$, 남한~$1.6^{\circ}C$, 후반기: 동아시아지역~$4.7^{\circ}C$, 남한~$4.6^{\circ}C$)에 의한 대기 중 수증기 함유량 증가와 여름 몬순의 강화로 전계절에 대해 강수량(전반기: 동아시아~10.5%, 남한~6.7%, 후반기: 동아시아~20.1%, 남한~31.9%)이 증가할 것으로 전망되었다. 수문기상 변화를 살펴보면, 미래 후반기에 남한은 $4.6^{\circ}C$가 상승하여 적설깊이는 5.3mm(-92.3%)가 감소할 것이고, 강수량의 연변동성을 크나 전체적으로 증가할 것이며, 토양수분, 증발산 또한 강수량 증가와 연관되어 증가할 것으로 전망되었다. 이렇게 ECHO-G/S SRES A2 시나리오를 기반으로 하여 역학적으로 상세화된 시나리오는 통계적으로 상세화된 시나리오 결과와 비교 검증함으로써 다중모델기법에 의해 불확실성을 제시함으로써 수문기상변화 예측을 위한 신뢰성 있는 자료로 활용될 수 있을 것으로 판단된다.

• Economic and Environmental Geology
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• v.52 no.5
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• pp.357-366
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• 2019

Deposition of the Daedong Supergroup has been considered to be related with the Triassic Songrim and Jurassic Daebo orogenies. The Chungnam Basin fills is an important sedimentary succession to understand the geological evolution of the Early to Middle Mesozoic Korean Peninsula. Previous paleontological and paleomagnetic studies have suggested the Late Triassic to Early Jurassic sedimentation of the Chungnam Basin fills. However, the orogenic model of the basin development has remained controversial because recently reported zircon U-Pb isotopic ages are not harmonious with the previous studies. This paper aims to review the stratigraphy, depositional age, and composition of the Chungnam Basin fills, together with test of the basin development models.

• The Journal of the Convergence on Culture Technology
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• v.7 no.1
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• pp.216-222
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• 2021

COVID-19 pandemic brings attentions to the nonmilitary and transnational non-traditonal security threats, as the scales of such damage by these threats are beyond expectation. The Republic of Korea Army tries to forecast non-traditional security threat which may be occurred in Korean peninsula by using collective intelligence platform. In coming years, climate change, social changes and technology development caused by the 4th industrial revolution will diversify non-traditional security threat. Considering urbanization, internet distribution rate, and geopolitical location where atmosphere from continent and ocean meet, Korea would may face the most lethal ones compared to those of other countries may face. Therefore, to predict such threats in pangovernment scale using collective intelligence platforms which embrace civil, public, military, industry, academy and research center is the most important than anything.

• Journal of the Korean earth science society
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• v.43 no.3
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• pp.464-479
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• 2022

In this study, appropriate geosites for geological field trips were explored and measures for their effective utilization in education were discussed, focusing on Okseo-myeon, Sanbuk-dong, Bieung-do, Yami-do, Sinsi-do, and Seonyu-do areas in Gunsan City, Korea. To this end, we analyzed the geological learning elements of the curriculum that were revised in 2015 and selected 7 geosites through field work based on prior research on the study areas. These areas have immense potential as a rich source of information on the Mesozoic geology of the Korean Peninsula, including igneous rocks formed as a consequence of Jurassic and Cretaceous igneous activities, Cretaceous sedimentary rocks, dinosaur footprints, plant fossils, ripple marks, and folds. When the learning elements available at the geosites were compared to those of the curriculum, they contained essentials used in high grade of elementary school and high school, and in particular, they had most of the learning elements used in high school. Accordingly, educational activities that can be carried out in each of the geosites in Gunsan City were proposed.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.01a
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• pp.155-157
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• 2022

담낭용종은 담낭암의 원인일 수 있다. 담낭용종의 잘 알려진 위험요소는 대사증후군, 젊은 나이, 이상지질혈증 등이다. 제주도는 한반도에서 약 80km 떨어져 있으며 한라산을 중심으로 두 개의 행정구역(제주시와 서귀포시)으로 나뉘어 있다. 국제공항과 국제항구는 유일하게 제주시에만 위치해 있다. 또한 제주시에는 서귀포시보다 기업체와 학교의 수가 더 많다. 식이 및 알코올 소비는 두 지역 간에 다르며 이러한 요인이 담낭용종 유병률에 영향을 미칠 것이다. 따라서 이 연구의 목적은 두 지역 거주민들의 담낭용종 유병률을 조사하고 담낭용종과 관련된 다양한 요인들을 비교해보고자 하였다. 본 연구는 2009년 1월부터 2019년 12월까지 제주대학교병원 단일 건강검진센터를 방문한 21,734명을 대상으로 하였다. 담낭용종 유병률과 관련된 요인을 제주시 거주민과 서귀포시 거주민 두 집단으로 나누어 조사하였다. 담낭용종 유병률은 제주시가 10.1%, 서귀포시가 9.2% (P = 0.039)였다. 평균 연령과 고위험 음주자의 비율은 서귀포시에서 더 높았다. 평균 체질량지수와 공복혈당, 총콜레스테롤, 저밀도지질단백질-콜레스테롤, 아스파르테이트아미노전이효소, 감마-글루타밀전이효소, 알칼리인산분해효소 수치는 제주시에서 낮게 나타났다. 이 연구에서 담낭용종 유병률은 제주도의 두 지역 간에 유의한 차이가 있었다. 연령과 알코올 소비는 이러한 차이에 기여하는 주요 요인이 될 수 있다.

• Korean Journal of Plant Resources
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• v.29 no.1
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• pp.90-109
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• 2016

This study aims to investigate the flora of Mt. Cheonma (Namyangju-si, Gyeonggi-do, Korea), including Korean endemic, rare and endangered plants. To support the biodiversity and usefulness of this investigation, we checked the red list plants, floristic regional indicator plants, climate change adaptation target plants and naturalized plants, and compared composition of plant species in Mt. Cheonma with nearby mountains. Totally, we performed 22 field investigations from April 2012 to October 2014. The number of vascular plants in this region is 433 taxa and comprised of 94 families, 266 genera, 378 species, 2 subspecies, 46 varieties, and 7 forms. Among them, there are 13 endemic plants designated by Korean Forest Service, whereas only 10 taxa are endemic species by Korean Ministry of Environment (KME). According to the IUCN criteria, there are 12 rare and endangered plants composed of 9 Least Concerned (LC), 2 Vulnerable species (VU), and one Endangered species (EN) found by Korea National Arboretum (KNA). Meanwhile, 8 taxa including 7 Least Concerned (LC) were found in Red List of KME. The floristic regional indicator plants designated by KME were 49 taxa. In addition, there are 14 taxa in The Adaptable to Climate Change Plant List designated by KNA, while only 19 taxa are naturalized plants. Generally, there are 190 common taxa in Gwangju Mountains area, and only 51 taxa are distributed in Mt. Cheonma.

• Journal of Korea Water Resources Association
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• v.56 no.10
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• pp.631-639
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• 2023

Flash drought (FD), characterized by the rapid onset and intensification, can significantly impact ecosystems and induce immediate water stress. A more comprehensive understanding of the causes and characteristics of FD events is required to enhance drought monitoring. Therefore, we investigated the FD events took place over the Korean peninsula using Global Land Data Assimilation System (GLDAS) data from 2012 to 2022. We first detected FD events using the stress-based method (Standardized Evaporative Stress Ratio, SESR), and analyzed the frequency and duration of FDs. The FD events were classified into three cases based on the variations in Actual Evapotranspiration (AET) and potential Evapotranspiration (PET), and spatially analyzed. Results revealed that there are regional disparities in frequency and duration of FDs, with a mean frequency of 6.4 and duration of 31 days. When classified into Case 1 (normal condition), Case 2 (AET-driven), and Case 3 (PET-driven), we found that Case 2 FDs emerged approximately 1.5 times more frequently than those driven by PET (Case 3) across the Korean peninsula. Case 2 FDs were found to be induced under water-limited conditions, and led both AET and PET to be decreased. Conversely, Case 3 FDs occurred under energy-limited conditions, with increase in both. Case 2 FDs predominantly affected the northwestern and central-southern agricultural regions, while Case 3 occurred in the eastern region, characterized by forested land cover. These findings offers insights into our understanding of FDs over the Korean peninsula, considering climate factors, land cover, and water availability.

• Korean Journal of Plant Taxonomy
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• v.42 no.1
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• pp.40-49
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• 2012

The NE Asiatic Solidago virgaurea complex in Korea has been reported on 5 taxa (S. virgaurea subsp. asiatica, S. virgaurea var. taquetii, S. virgaurea var. coreana, S. virgaurea subsp. leiocarpa, and S. virgaurea subsp. gigantea). However, the broad morphological variations and a lack of diagnostic characteristics have made it difficult to distinguish these taxa and have thus resulted in a complicated taxonomy in the complex. Therefore, to clarify the classification and delimitation of each taxon, the morphological characteristics of the S. virgaurea complex were investigated by examining the original descriptions and type specimens. Field work was also conducted to investigate the morphological and geographic features. In conclusion, S. japonica Kitam., as a legitimate name, was distributed all over the country except for the Is. Ulleung-do in Korea, as distinguished from S. virgaurea L. Both S. virgaurea var. taquetii and S. virgaurea var. coreana were considered as synonyms of S. japonica, as their morphological characteristics were within the variation range of those of S. japonica. Furthermore, S. virgaurea subsp. leiocarpa does not occur in Korea. Additional investigations are required to clarify the classification of S. virgaurea subsp. gigantea, whose populations were not found during the investigation in this study. S. dahurica, meanwhile, was distributed in the northern part of North Korea.

• Journal of the Mineralogical Society of Korea
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• v.31 no.2
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• pp.123-135
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• 2018

This study tried to find the clue to Seokrok province by comparing Seokrok used in painting culture properties with Seokrok ore from domestic occurrence and imported Seokrok ore. To this end, chemical and mineralogical characteristics of painting cultural properties were identified with portable X-ray Florescence (p-XRF), micro X-ray diffraction (micro XRD) and SEM/EDS Analysis. To obtain Pb isotopic ratio, the Pb contained in Seokrok has been analyzed with Thermal Ionization Mass Spectrometer. Atacamite (or botallackite) and small quantity of brochantite were identified from Seokrok in Dancheong, and malachite was also identified from Buddhist painting besides those two ingredients. Without distinction of type, most Seokrok used in painting cultural properties is atacamite composed of Cu and Cl. From Pb isotope analysis, it was found that Seokrok in painting cultural properties was closer to that of north Korea, north China and Japan than south Korea as in regional division for East North Asia suggested by Mabuchi. The Pb isotopic ratio of domestic green mineral belongs to the distribution of Seokrok inside the painting cultural properties but imported malachite showed considerably difference. Considering the fact that atacamite, the main mineral of Seokrok in painting cultural properties is rarely produced from southern mine of the Korean Peninsula and the result of Pb isotope analysis.

• Journal of agriculture & life science
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• v.52 no.6
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• pp.163-173
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• 2018

This study was carried out to propose the baseline data for in situ conservation by analyzing environmental and growth characteristics in Pedicularis hallaisanenesis habitats. P. hallaisanensis habitats, according to investigations, were located on the slope of southwest at an elevation of 1,400 m in Mt. Gayasan and on the slope of southeast at an elevation of 1,500 m in Mt. Hallasan. Pedicularishallaisanensis habitats. Also, habitats were found at the grassland with no upper vegetation. In the study sites, soil pH and soil organic matter were 4.9-6.5 and 4.4-8.1%, respectively. A total of 55 vascular plants taxa were identified in ten quadrats in two habitats, of which 25 were inhabited in Mt. Gayasan and 37 in Mt. Hallasan. Current status of P. hallaisanensis habitats were very vulnerable with the pressure of the vegetation constantly threatening the species' survival. Thus, concrete conservation plans including diverse factors as light intensity, temperature and genetic analysis to protect natural habitats should be set up as soon as possible.