• Ocean Science Journal
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• 제42권1호
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• pp.31-39
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• 2007

Distributional characteristics of dinoflagellate cysts in surface sediments were investigated in relation to environmental factors in the eastern part of Geoje Island, Korea. Samples were collected from 10 stations in February of 2004 and water temperature and salinity were measured in February, May, September and November of 2004. Total 30 taxa of dinoflagellate cysts were identified representing 19 genera, 28 species and 2 unidentified species. Among these dinoflagellate cysts, Brigantedinium spp. of which relative proportion in th e total dinoflagellate cysts was 23.5%, was the most abundant at all stations except St. 1, and was followed by Spiniferites bulloideus (8.6%), Lingulodinium machaerophorum (8.2%) and Diplopsalis lenticula (6.7%). In addition, ellipsoidal cysts of the genus Alexandrium (Alexandrium catenella - tamarense type) and Gymnodinium catenatum, known to be causative organisms for PSP, occurred with high concentrations. Scrippsiella trochoidea was also found; however, its cyst concentration was low. Generally, species composition in the study area was similar to these reported from Jinhae Bay and Busan Harbor and several dinoflagellate cysts reflected the eutrophic condition. Cyst distribution in th e eastern part of Geoje Island seems to be influenced by the Tsushima Warm Current flowing from the southwest. The mean water temperature was $12.0^{\circ}C$ in February, $14.7^{\circ}C$ in May, $20.9^{\circ}C$ in September and $17.2^{\circ}C$ in November, which was most favorable for Alexandrium spp. growth. The abundances of dinoflagellate cysts rang e d from 528 to 2,834 cysts/g dry sediment. Higher concentrations were recognized in sediments of west area of the Jisimdo than at other stations. The cyst composition of this area was closely related to these of Jinhae Bay and Busan Harbor from which currents flow into this area. Higher cyst concentration in the west area of Jisimdo might be due to formation of the gyre.

• 환경영향평가
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• 제21권3호
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• pp.445-460
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• 2012

In order to evaluate and predict the environmental impact of the low-trophic-level ecosystem to environmental changes in the Yellow Sea and the East China Sea, an ecological modelling study was undertaken. Simulation results of average distribution patterns and concentrations of water quality factors during the summer by the model were acceptable. Phytoplankton and remineralization rate of organic matter were very important parameters by a sensitivity analysis. Water quality factors showed high values in the estuary of the Yangtze River and in the West and South Sea of Korea and low values in the central area of the Yellow Sea. There is a plume of high values, especially nutrients, off the mouth of the Yangtze that expands or contracts with changes in the discharge strength. Characteristics of responses of water quality factors vary for different scenarios of environmental change, such as land-based pollution sources and atmospheric forcing. It is suggested that changes of light intensity, discharges of input sources, and wind play an important role in the marine ecosystem.

• 농촌지도와개발
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• 제17권2호
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• pp.213-232
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• 2010

The regional development strategy of China is involved basically with national macro economical development policies. In general, the development process were The procedures of 'balancing development-unbalancing development- rebalancing development'. The first restructuring is a balancing development strategy represented as the three-district construction and the second restructuring is the unbalancing development strategy represented as the preferential development of the east area after reformation & development. The third regional development strategy making current progress is a new regional balancing development policy including the great development of the west district. The study grasped how much the regional balancing development policy contributed to bridge the gap among other areas with coefficient of variation to analyze changes of regional development related indexes among the areas before/after the regional balancing development policy which had been progressed after 1991 with harmonious development among areas as its goal was carried out. It was also analyzed that the Chinese government's goal of regional development policy was how well-suited to the Chinese reality through regression analysis, so far. However, the results obtained of the study were summarized in Table6, Table7 and Table8.

• 중국학논총
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• 제71호
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• pp.237-254
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• 2021

It can be said that the fishery industry in ancient China did not originally occupy a very special economic area even when it was started. At that time, the fishery industry was only treated as a means for the livelihood of ordinary people. Over time, the value and economic benefit of aquatic products began to be valued. Its origin can be said to have originated from Yugong(禹貢), which was established by King Yu. These records made it clear that the ancient kings placed great importance on the economic value of seafood and the importance of the fishery industry in the government. Thus, the fishery industry was established as a part of the socio-economic system. In ancient China, the fishery industry was one of the industrial systems that supported traditional Chinese society along with agriculture. It will be possible to analyze the way of thinking of modern Chinese people on the fishery industry through the study of the fishery industry in the traditional era of China. And based on this analysis, I think that it will be able to contribute to a certain extent in establishing a theoretical foundation for countermeasures against the reckless overfishing of fishery resources by Chinese fishermen in the West Sea, which is currently a problem.

• 대기
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• 제18권4호
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• pp.279-286
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• 2008

In the tropical western Pacific (especially, west of 135oE, including South China Sea and the Philippines), during boreal summer, it was found that a strong correlation exists between the tropical cyclone activity and the drought conditions in Korea. During the summer drought, firstly, there were strong ascending flows over the tropical western Pacific with more tropical cyclone genesis, and to compensate for this, descending flows develop in the mid-latitudes, thereby causing drought; in other words, a secondary circulation is formed between the tropical western Pacific and mid-latitudes of East Asia. Secondly, the developments of both the subtropical western Pacific high and the Manchurian low are suppressed. As a result, both the land-sea pressure gradient and the southerly flow from low-latitudes to Korean area are also weakened, which reduces approaches of tropical cyclones to this area despite the high frequency of their geneses.

• 수완나부미
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• 제11권1호
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• pp.71-100
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• 2019

The region between mainland China on the east and the Indian sub-continent on the west is referred to as Southeast Asia since the conclusion of the Pacific War (1941-1945). As a region, Southeast Asia appears as a hodgepodge of disparity and diversity, but a closer scrutiny reveals numerous common attributes and characteristics. This study attempts to identify and examine the cohesive and shared characteristics across the Southeast Asian region from a historical and sociocultural perspective. The intention is to differentiate an identity borne of the underlying commonalities of shared characteristics whether physical, experiential, emotive, and/or in terms of heritage. Subsequently, Southeast Asia has more grounds to claim itself as a distinct region, and an "area of study," besides the political expediency of ASEAN.

• 수산해양교육연구
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• 제28권6호
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• pp.1695-1705
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• 2016

With the rapid development of global economic and trade, the ports in the North-east Asia region have developed greatly. In such a fierce competition, how to ascertain right evaluation methods to assess the competitiveness of the ports, and make scientific and rational development strategy for upgrading the overall level of competitiveness of ports in North-east Asia, has become the first task for all the ports for coping with the challenges. As China's sustained economic growth of more than 30 years, the economic power and comprehensive national strength has been changed, China's international status has been greatly improved. Also China has achieved remarkable new results in the construction of peripheral diplomacy, and further has consolidated the relationship of countries along the Silk Road Economic Belt. The strong position of RMB in foreign exchange market and the implementation of the strategy of "area" opening to the outside world accelerated economic belt along the silk road in China to the west open pace. On the basis of the SWOT analysis of the Lianyungang Port, combined with the comprehensive and practical port competitiveness evaluation indicators system and competitiveness evaluation method, calculate the competitiveness level of Lianyungang port in East China, and find out the problems must be solved. The development strategies for Lianyungang port under One Belt One Road were suggested.

• 대한공간정보학회지
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• 제13권2호
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• pp.13-20
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• 2005

서해안 지역은 1980년대 말부터 국토의 균형개발과 중국대륙을 겨냥한 국가적 요청에서 본격적인 개발이 시작되었고 최근에는 수도권 서부를 동북아 중심축으로 성장시킨다는 청사진 아래 대규모 개발이 이어지고 있다. 앞으로도 계속적인 개발이 있을 것으로 예상되며 그에 따라 서해안 일대에는 많은 변화가 예고되고 있다. 본 연구에서는 인공위성 영상에 의한 서해안 일대의 지형 및 지물 변화를 분석 한 것으로, 이를 위한 기본도를 구축하기 위해 landsat 영상을 이용하여 모자이크 영상을 제작하였다. 1:25,000의 수치지도를 통해 GCP를 비교함으로써 영상의 정확도를 검증하였으며, 모자이크된 1970년대와 2000년대의 영상 중 서해안 일대의 간척지인 시화지구와 화옹지구 및 안산시를 대상으로 그 변화를 알아보았다. 그 결과 간척지 개발이나 육지의 경우 나지상의 개발로 인해 지형상의 변화는 많지 않은 것으로 나타났으며, 토지이용의 면적변화를 산출하여 비교함으로써 수계와 나지가 감소하고 농업지역과 도심지역이 증가되었음을 알 수 있었다.

• 암석학회지
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• 제21권2호
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• pp.59-87
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• 2012

최근 송림 조산운동시기인 트라이아스기에 홍성 지역의 에클로자이트와 경기육괴 내에 광범위하게 나타나는 충돌 후 화성암이 형성되었음이 확인되었다. 이러한 새로운 발견에 의해 1980년대 말에 확인된 남중국판과 북중국판의 충돌대인 트라이아스기 친링-다비-수루 충돌대가 한반도의 홍성 지역으로 연결된 후 양평 지역을 거쳐 오대산 지역으로 연결되는 모델이 제시되었다. 그 이후 충돌대는 일본 서남부의 고생대 섭입 복합체와 북한의 고생대 섭입 복합체인 연변대로 연결될 가능성이 높다. 이럴 경우 경기육괴는 홍성-양평-오대산 충돌대를 경계로 나뉘어져야하며 충돌대 북부는 북중국판에 남부는 남중국판에 대비될 것이다. 남중국판과 북중국판의 충돌은 페름기에 한반도로부터 시작하여 중국 쪽으로 진행되었으며 트라이아스기 말에 충돌이 완료되었다. 다비-수루-홍성-양평-오대산 충돌대를 따라 동측에서 서측으로 변성조건이 체계적으로 변화한다. 가장 동측에 해당하는 오대산 지역에서는 245-230 Ma 초고온 변성작용이 한반도의 서측에 해당하는 홍성지역에서는 230Ma 고압변성작용이 그리고 중국의 수루, 다비 지역에서는 220Ma의 초고압 변성작용이 일어났다. 충돌대를 따라 나타나는 체계적인 변성조건의 변화는 충돌 전 섭입된 해양지각의 양이 동측에서 서측으로 증가하여 섭입하던 대륙판과 해양판의 분리되는 깊이가 동측에서 서측으로 점차 증가하였기 때문인 것으로 생각된다. 한반도 남부 영남육괴와 남중국판 남부에 광범위하게 나타나는 페름기-트라이아스기 섭입관련 화성암은 북중국판과 남중국판의 페름기-트라이아스기 충돌이 남중국판 남쪽 경계부에서의 섭입작용을 시작시켰을 가능성이 있음을 지시한다. 즉 한반도의 송림 조산운동 시기에는 경기육괴지역에서 대륙충돌이 일어나 한반도가 형성되었으며 동시에 대륙충돌에 의해 영남육괴 남측에 섭입대를 형성되었을 것으로 예상된다. 홍성-양평-오대산 충돌대를 경계로 하여 경기육괴 북부와 남부는 모두 콜롬비아 초대륙 형성 후기인 1870-1840 Ma에 대륙충돌이나 섭입 작용에 의해 화성 및 변성작용을 강하게 받았다. 옥천 변성대는 중국 남중국판 내에 나타나는 760Ma 경에 형성된 난후아 열곡대에 대비될 수 있으며 그럴 경우 경기육괴 남부와 영남육괴는 각각 남중국판의 북부 양쯔판과 남부 커테시아판에 대비된다. 최근 경기육괴 변성퇴적암, 옥천변성대 등에서 광역적으로 발견되는 실루리아기-데본기의 쇄설성 저어콘은 경기육괴 내에 데본기 혹은 그 이후 고생대 시기의 퇴적암이 존재할 가능성을 제시하고 있으며 홍성과 광천 지역에서 확인된 데본기의 변성작용과 함께 페름기-트라이아스기의 대륙충돌 이전인 고생대 중기에도 경기육괴에 활발한 지구조 운동이 일어났음을 지시한다.

• 암석학회지
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• 제18권2호
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• pp.171-179
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• 2009

북한의 평안분지 서부의 증산-평원지역에 분포하는 선캠브리아 기저를 이루는 화강편마암에서 분리한 저콘에 대하여 LA-ICP-MS U-Pb 연대측정을 실시하였다. 그 결과 $1,873{\pm}19(2{\sigma})$Ma의 일치곡선연령을 구하였으며 이는 고원생대의 화강암질 화성활동을 나타낸다. 한반도의 선캠브리아 기저지각 암석들로부터 SHRIMP 및 LA-ICP-MS 등의 방법에 의해 구한 최근의 정밀한 연대자료를 살펴보면 영남육괴, 경기육괴, 낭림육괴 등 한반도 전역에서 이 화강편마암과 마찬가지로 ${\sim}$1870 Ma의 연령이 가장 빈도 높게 보고되고 있다. 이 시기의 지질사건들은 지역에 따라 화강암질 화성활동뿐만 아니라 고온의 광역변성작용도 함께 나타나는 것으로 해석되고 있다. 인접한 중국의 북중국과 남중국지괴들 역시 유사한 시기의 화성 및 변성활동들이 보고되고 있으며 한반도의 선캠브리아 육괴들이 북중국과 남중국 어느 지괴와 대비되는지는 더 많은 자료와 연구가 필요하다.