• 한국해양학회지
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• 제23권4호
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• pp.169-183
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• 1989

한국(韓國) 동남해역(東南海域)의 대륙란(大陸爛)에 서식(棲息)하는 다모류군집(多毛類群集)의 종류를 파악(把握)하고, 또한 이들 군집(群集)이 서식지(棲息地) 환경(環境)에 어떻게 적응, 서식하는가를 밝히고자 하였다. 총80개 조사정점에서 채집된 다모류(多毛類)의 종류와 개체수의 자료로부터 집괴분석(集塊分析)을 실시한 결과 본 연구해역은 크게 연안역(沿岸域)과 외해역(外海域)으로 양분되었고, 8개의 다모류(多毛類) 군집(群集)이 구별되었다. 이질(泥質) 퇴적물(堆積物)이 우세한 연안역(沿岸域)에서는 Nothria holobranchiata 군집(群集)이 포항 근해역에, Magelona-Maldane 군집(群集), Ophelina acuminata 군집(群集), Nothria conchylega 군집(群集)이 연안해역의 남북방향으로 존재(存在)하였다. 이들 연안역(沿岸域)의 군집(群集)들은 종수가 적고 종다양성 지수도 낮았다. 외해역(外海域)에서는 이질퇴적물(泥質堆積物)로 구성된 대륙붕단에 Terebellides-Aglaophamus 군집(群集)이 존재(存在)하였고, 이사질(泥砂質)과 사질(砂質)이 우세한 지역에서는 Myriochele oculata 군집(群集), Spiophanes kroyeri 군집(群集) 및 Ninoe palmata 군집(群集)이 존재(存在)하였다. 외해역(外海域)의 군집(群集)들은 연안역(沿岸域)에 비해 종수나 종다양성이 높았으나, 평균서식밀도는 낮았다. 대부분의 우점종들은 그들의 식이형(食餌型)과 내장의 내용물로부터 특정 퇴적물(堆積物)에 높은 선호도를 보임을 알 수 있었다. 동일 퇴적물(堆積物)에서의 다양한 군집(群集)의 존재(存在)는 수심과 수온이 저서(底棲) 다모류(多毛類)의 분포와 관계가 있음을 시사하였다. 따라서 연구해역의 다모류군집(多毛類群集)은 퇴적물(堆積物)의 특성과 수심(水深) 또는 수온(水溫)에 따라 결정됨을 보여준다.

• 대한지리학회지
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• 제37권4호
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• pp.385-402
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• 2002

본 연구에서는 지난 26년간 (1973~1998) 기온과 상대습도에서 산출한 열지수(Heat Index)를 분석하여, 남한에서 발생한 생리기후적 체감 무더위의 시.공간적 분포 특징을 살펴보았다. 그 결과, 공간적으로, 중서부 내륙지방, 남서부 내륙지방, 남동부 내륙 지방을 중심으로 주요 생리기후 임계치 이상을 기록한 무더위가 빈번하게 발생하였다. 특히, 남동부 내륙의 밀양 지역은 타 지역에 비해 보다 빈번하게 장기간에 걸친 높은 열지수를 기록하여 남한에서 가장 무더운 생리기후적 극서지임이 밝혀졌다. 시간적으로, 1990년대에 접어들어 대부분의 연구지역에서 각 생리임계치 이상을 기록한 무더위의 발생빈도가 많이 증가하였다. 특히, 1994년은 연구기간 중 각 생리임계치 이상의 무더위 발생빈도가 남한 전 지역에 걸쳐 가장 높게 나타난 해였다. 보편적으로 일년 중 40.6$^{\circ}C$ 이상의 열지수를 나타내는 강한 무더위는 주로 여름장마가 끝나는 7월 말에서 1-2일간의 작은 강수가 시작되는 8월 초순 사이에 발생하였다. 이러한 남한의 무더위 발생의 시.공간적 분포 패턴은 대규모의 기단의 움직임뿐만 아니라 국지적인 지형, 위도, 해발고도, 수체 또는 도시화, 산업화. 조림사업 등의 자연적 인위적 기후 인자의 영향을 받아 지역마다 다양하게 나타났다.

• 지구물리
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• 제2권1호
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• pp.75-88
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• 1999

물리탐사의 최근 주된 관심 분야는 대상지역에 대한 각종 탐사자료를 복합적으로 해석하여 탐사대상의 지하구조를 3차원적으로 정확히 규명하는 작업이다. 이 연구에서는 연구 지역에 대한 1차원의 슐럼버져배열 전기비저항 수직탐사를 2차원 및 3차원적으로 확장·해석하기 위해 먼저 전기비저항 자료를 영상화한 뒤 이들을 서로 보간하여 전기비저항의 단면·입체도를 재건하였다. 파쇄대와 같은 전기비저항 불연속면은 재건된 단면·입체도에서 더욱 공간적으로 파악될 수 있었고 대상지역의 파쇄대와 관련된 것으로 보이는 저비저항대는 지역의 중앙부에서 화강암질 기반암 하부까지 확장된 것으로 나타난다. 선구조 부근의 탄성파속도는 약 3,000 m/s로서 주위에 비해 작게 나타나며 이를 축으로 풍화대의 깊이는 남동쪽이 북서쪽보다 상대적으로 큰 것으로 해석되었다. 초정지역에 대한 전기비저항, 탄성파속도, 방사능 등의 속성자료는 지리정보시스템 소프트웨어인 ARC/INFO를 이용하였고 복합해석도의 영상강화를 통해 나타난 주요 단열 및 파쇄대는 전기비저항과 탄성파속도가 모두 낮게 나타나는 대상지역의 남동부에 많이 발달한 것으로 보인다. 이에 반하여 방사능 자료는 전기비저항, 탄성파 속도와 비교할 때 지질경계면에서 잘 반응하지 못한 것으로 나타난다.

• The Korean Journal of Ecology
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• 제24권6호
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• pp.341-348
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• 2001

Population dynamics of the oldest relic stand of Pinus densiflora for. erecta which remains as a status of patch in Sokwang-Ri area, Uljin-Gun, was studied to provide the basic data for conservation of the oldest pine stand in Korea. The upper slope site and ridge site including total 12 plots mainly represented Pinus densiflora for. erecta and Quercus mongolica. These two tree species showed reverse J-shaped distribution. From this information, it was concluded that intensive interspecific competition between two species could be occurring. Age distribution of P. densiflora for. erecta on the sites above middle slope area was indicated bi-modal type or tri-modal type which was known as an age structure of climax forest. Therefore, it was estimated that Pinus densiflora for. erecta population could be continuously maintained in the each patch above middle slope area. In the valley sites, hardwood species such as Q. mongolica, Q. variabilis, Styrax obassia and Acer pseudosieboldianum occupied most part of the under crown-cover area and their seedlings and saplings were developing into the closed upper layer crown because the height of upper layer crown reached about 35 meters and such a high crown height was more suitable for light utilization by plants of under layer. The growth patterns were mainly fluctuated for the entire life time of the oldest tree caused by frequent disturbance. And the initial growth curves of the mature trees and suppressed juvenile trees showed different tendencies along the sites.

• 한국관광식음료학회지:관광식음료경영연구
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• 제13권2호
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• pp.207-221
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• 2002

Wolaksan is a national park which has beautiful scenery with exposed rocks. The mountain is 1097 meters high and has 3 tops which are Jungang(the center), Arae(the lower part), Jjokduri. The highest point of the vertical cliff is 150m from the earth and the total circumferences of three tops is about 4km. These tops are easy to break by grains because they are from sedimentary rocks. Wolaksan is a bad mountain because the area is a Mosikjuk rocky area. However, the area around Wolaksan is thicky wooded and has many achievements and it makes good scenery. From top to southeastern, there are vertical cliff, The tops are originally from one but these are divided by partial weathering corrosion. The slide of path to Wolaksan is about 70。. The lower part of the mountain from Shinroksa to top has a gentle slope but there are a steep slope from the middle. Especially, the area has many rocks. The rocks of Wolaksan are almost granitic-gneiss or metamorphic rocks so it often fall down. Because of these fallen rocks, its valleys have great landscapes. The size of rock is less than 60cm. The landscapes of valleys such as Songgye, Dukju, Yonghwa are the main natural tourism resources.

• Journal of Ecology and Environment
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• 제29권5호
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• pp.445-452
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• 2006

The number of species and forest area has decreased as urbanization is progressed. The landscape degradation was examined by analyzing vegetation map, satellite image and characteristics of actual vegetation. The study was conducted in Mt. Baekja and its surroundings located on Gyeongsan city, southeastern Korea. As the result of landscape analysis, agricultural field was a characteristic attribute of the study area. Lowlands of this study area were occupied by agricultural field and various plantations. For 15 years from 1987 to 2002, forest area decreased from 2,072.9 ha to 1,853.2 ha, and shape index and fractal dimension of vegetation patches increased from 1.32 to 1.65 and from 1.05 to 1.09, respectively. Pinus densiflora Siebold & Zucco. community showed the highest species diversity, whereas Larix kaempferi (Lamb.) Carriere community showed the lowest species abundance. As forest management implications, monitoring of endangered plant species (Jeffersonia dubia (Maxim.) Benth. & Hook.f. ex Baker & S.Moore), and restoration of lowland forest from plantation to natural forest were discussed. Further, establishment of greenways utilizing existing streams, roadside, and public facilities were recommended.

• 수산해양교육연구
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• 제24권1호
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• pp.9-17
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• 2012

The relationship between adult abundance and zoea I (ZI) density of Dungeness crabs was investigated in southeastern Alaska. Commercial harvest data (catch per pot) for male crabs larger than 165 mm in carapace width were collected from the Alaska Department of Fish and Game (ADF&G) management area, district 114 and a subdivision of district 114, 114C from 1996 to 2003. Commercial harvests of Dungeness crabs in the management area varied interannually. Commercial harvests decreased until 2000 but increased beginning in 2001. ZI density was obtained from zooplankton samples collected monthly from sampling stations within the same management district from 1997 to 2004. ZI occurred mostly in May and June, but as late as July in 1997 and 2002. ZI densities increased beginning in 1999. Total densities of ZI were significantly correlated with the commercial harvest data of adult male crabs within the management area, 114C (tens of square kilometers), containing the plankton sampling stations, but were not related to total commercial harvests within the larger geographic management area 114 (hundreds of square kilometers). We suggest that larval density may be an indicator of abundance of adult populations of Dungeness crabs.

• 대기
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• 제20권4호
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• pp.387-398
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• 2010

This study shows that frequency of tropical cyclone (TC) around Korea in summer (June-September) has positive relation with Arctic Oscillation (AO) in the preceding April. In a positive AO phase, each of anomalous cyclone and anomalous anticyclone is developed in low latitude and middle latitude regions of East Asia from the preceding April to summer. As a result, while anomalous southeasterly around Korea serves as a steering flow that TCs move toward this area is strengthened, northwesterly that reinforced in southeastern area of East Asia plays a role in preventing TCs from moving toward this area. In addition, due to this distribution of pressure systems developed in this AO phase, TCs tend to occur, move and recurve in further northeastern region in the western North Pacific than TCs in a negative AO phase. On the contrary, TCs in a negative AO phase mainly move westward toward southern China or Indochina Peninsula from Philippines. Eventually, intensity of TCs is weaker than those in a positive AO phase due to the terrain effect caused by high passage frequency of TCs in mainland China.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.463-466
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• 2009

The numerical simulation optimized by Four Dimensional Data Assimilation (FDDA) with Quick Scatterometer (QuikSCAT) data is carried out to evaluate wind resource characteristics at various heights in the southeastern area of the Korean Peninsula, where wind farms are planned to be built on on- and off-shore as well as comparable diurnal wind variations are characterized at the surface. The temporal and spatial distributions of modeled wind speeds showed good agreement with the observations based on the temporal variation analysis. Model results indicate that the higher model is performed in resolution, the more precise results is at turbine hub height. Occasionally, wind speed variations for each numerical resolution has a different regional and seasonal variations. In the coast area, hub height wind speed of 9km-resolution is simillar to that of 3km-resolution. On the other hand, hub height wind speed of 3km-resolution is simillar to that of 1km-resolution in the Jiri mountainous area.

• 한국수산과학회지
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• 제37권2호
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• pp.148-158
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• 2004

In the adjacent seas of Cheju Island, the oceanographic conditions show low salinity surface waters starting in May. This water flows from the southeast part of the China Coastal Water, which flows southeastward along the Great Yangtze Sand Bank until April, with the help of southeasterly winds and flows from the adjacent sea off Cheju Island. In May, the Tsushima Warm Current and the low salinity surface water fluctuate in short and long-term periods as influenced by Yellow Sea Cold Water, which flows to the bottom layer at the western entrance of Cheju Strait. Temperature and salinity fronts in the northeastern sea area of U Island are formed in the boundary area between the Tsushima Warm Current, which expands towards Cheju Island from the southeastern sea area of Cheju Island and Hows out from the eastern entrance of the strait. Seasonally, additional oceanographic conditions, such as coastal counter-currents, which flow southward, appears within limited areas in the adjacent eastern and western seas of Cheju Island.