• Title/Summary/Keyword: korean peninsula

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A Critical Review on Setting up the Concept, Timing and Mechanism of Tertiary Tilted Flexural Mode of the Korean Peninsula: A new hypothesis derived from plate tectonics ('신생대 제3기 경동성 요곡운동'의 개념, 시기, 기작에 관한 비판적 고찰: 판구조운동 기원의 새로운 가설)

  • Shin, Jaeryul;Hwang, Sangill
    • Journal of the Korean Geographical Society
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    • v.49 no.2
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    • pp.200-220
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    • 2014
  • This study reexamines the old concept and reviews prevalent statements on Cenozoic vertical motions of the peninsula that have been uncritically repeated in our academia. The contents of this paper are redefinition of the notion, tilted flexure or warping, and a suggestion for a new time set and properties of the deformation, followed by a new model on its influencing factors and processes. In conclusion, the Cenozoic vertical motion of the Korean peninsula can be reified further with an epeirogenic movement of uplift in the east side-subsidence in the west side of the peninsula since the Neogene (23 Ma). However, the regional boundary for areas of uplift and subsidence is not likely in the Korean peninsula but broader farther to East China and the southern part of Russia. It can be best understood that mantle convection produced by subducting activities in the Western Pacific Subduction Zone causes the uplift and subsidence of earth surface around NE Asia. In addition, faultings in the upper lithosphere induced by in-situ plate boundary stresses accelerate regional uplift in the peninsula since the Quaternary. Controversies that are still standing such as current uplift movements along the western coast of the peninsula during the late Quaternary could be precisely discussed with future research providing detailed information on it.

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Trends in Sea Surface Temperature (SST) Change Near the Korean Peninsula for the Past 130 Years (지난 130년 간 한반도 근해의 표층 수온 변화 경향)

  • Kim, Seong-Joong;Woo, Sung-Ho;Kim, Baek-Min;Hur, Soon-Do
    • Ocean and Polar Research
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    • v.33 no.3
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    • pp.281-290
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    • 2011
  • This study examined the change in sea surface temperature (SST) around the Korean peninsula since industrialization at year 1880, and its possible causes using observation based data from the Hadley Center, the Goddard Institute of Space Studies, and National Climate Data Center. Since year 1880, There have been multi-decadal fluctuations with a gradual reduction from 1880 to around 1940, and from 1950-1980. There has then been a marked increase from 1940-1950, and from 1980 to the present. The ocean surface warming is larger during the boreal winter than summer, and greater in the south. The multi-decadal SST fluctuations around the Korean Peninsula are largely consistent with the negative phase of the Pacific Decadal Oscillation (PDO), which fluctuates with periods of about 20-50 years. Secondly, the El Ni$\tilde{n}$o-Southern Oscillation (ENSO), whose long period component moves along with the PDO, appears to influence the SST near the Korean Peninsula, especially in recent decades. Overall, the SST around the Korean Peninsula has warmed since year 1880 by about $1^{\circ}C$, which is about twice the global-mean ocean surface warming. This long-term warming is aligned with an increase in greenhouse gas concentration, as well as local factors such as the PDO.

Effects of the 1975 Haicheng Earthquake on the Korean Peninsula (1975년에 발생한 중국 해성지진이 한반도에 미친 영향)

  • 추교승
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • 1998.10a
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    • pp.210-221
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    • 1998
  • In the period from the year 1500 to 1980. at least 14 large earthquake with epicenters in the northeastern China and Yellow Sea were felt or destructive in the Korean Peninsula. The most sigmificant events among them were the 1668 July 25 Tancheng earthquake of mamnitude 8.5, and the 1975 Feb. 4 Haicheng earthquake of magnitude 7.3. The Haicheng earthquake of the year 1975 in am extraordinary one among those occurred in the northeastern China in the 20th century in the sense the Shake of the event affected all over the Korean Peninsula. The tremor was felt even at the southeastern tip of the Korea and northern part of Kyushu 700km far away from the epicenter. In order to see the variation and trend of the effect of the Haicheng earthquake on the Korean Peninsula, the two data sets of the northern and southern parts of the peninsula were merged into one combined data set. The spatial variation of intensity shows smooth decrease from the value 4 of the northwestern region near the source to the value 1 of the Cheju Island and Kjushu. However, there are four regions of locally high intensity value. They are the region along downstream of Abrok(Yalu) River with intensity 5, the region around Shinpo of intensity 4, the area comprising Seoul and Chuncheon Cities of intensity 4, and Pohang-Pusan area of intensity 3. We suppose that there might be three types of possible mechanisms. The first one is concerned with the lateral inhomogeneity of velocity in the crust caused by wide distribution of relatively fractured rock. The second one is related with reflections of surface waves caused by the crestal thinning effect at border regions of the Peninsular in contact with the Ulleung Basin and the Japan Basin. The third possibility is local site effect caused by thick Tertiary or Quaternary rocks and soil layers.

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Intertidal Fishes from the Shandong Peninsula, China (중국 산둥반도의 조수웅덩이 어류상)

  • Choi, Youn;Yang, Zhen-Feng
    • Korean Journal of Ichthyology
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    • v.20 no.1
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    • pp.54-60
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    • 2008
  • This study was conducted to investigate the species composition and distribution patterns of intertidal fishes from the Shandong Peninsula, China from August 2006 to September 2007. The collected fishes were composed of 28 species, belonging to 21 genera, 14 families and 6 orders. Among them, the family Gobiidae was most abundant in both the number of species and individuals, while two species including Hexagrammos agrammus and Sebastes schlegelii were caught in large quantities of young fishes. In this study, Sebastes koreanus and Porocottus leptosomus known as Korean endemic species so far were collected in the Shandong Peninsula, therefore it should be revised that these two species were distributed on the North Yellow Sea and owned by both China and Korea.

A Study on the Atmospheric Clearness Estimation of Major Cities in Korea Peninsula Using Empirical Forecasting Models (경험적 예측모형을 통한 한반도 주요 도시의 대기청명도 평가)

  • Jo, Dok-Ki;Kang, Young-Heack
    • Journal of the Korean Solar Energy Society
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    • v.28 no.4
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    • pp.25-34
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    • 2008
  • Since the atmospheric clearness index is main factor for evaluating atmosphere environment, it is necessary to estimate its characteristics all over the major cities in Korea Peninsula. We have begun collecting clearness index data since 1982 at 16 different cities in South Korea and estimated using empirical forecasting models at 21 different stations over the North Korea from 1982 to 2006. This considerable effort has been made for constructing a standard value from measured data at each city. The new clearness data for global-dimming analysis will be extensively used by evaluating atmospheric environment as well as by solar PV application system designer or users. From the results, we can conclude that 1) Yearly mean 63.5 % of the atmospheric clearness index was evaluated for clear day all over the 37 cities in Korea Peninsula, 2) Clear day's atmospheric clearness index of spring and summer were 64.6 % and 64.8 %, and for fall and winter their values were 63.3 % and 61.3% respectively in Korea Peninsula.

Notes on Harpalini (Coleoptera, Carabidae) from Korea (1) (한국산(韓國産) 먼지벌레 족(1))

  • Moon, Chang-Seop;Paik, Jong-Cheol
    • The Korean Journal of Soil Zoology
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    • v.11 no.1_2
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    • pp.30-47
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    • 2006
  • The taxonomic revision was made on the tribe Harpalini (Coleoptera: Carabidae) in Korea. The Korean species are arranged after Kryzhanovskij et al. (1995) system with minor emendation. This present list is an attempt to bring together the available literature and collection-based information on fauna or taxa recorded from Korea (including some collections from the northern part of the Korean Peninsula, now North Korea). Materials examined for each species, an annotative checklist of Korean Carabidae, and the practical key to tribes and genera are provided. As a result, a total 86 species (and subspecies) belonging to 13 genera are recognized from the Korean Peninsula, of which one species (Harpalus egorovi) is new to South Korea. Distribution of two species, Harpalus tardus and H. tibeticus hsifanicus, are very doubtful in the Korean Peninsula. Besides, numerous new distribution records are given as based on materials deposited in various Universities and private collections.

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The Study on the transition in plane type classification of Korean traditional houses (우리나라 전통민가 평면유형분류의 변천에 대한 고찰)

  • Cho, Wonseok
    • Journal of the Korean Institute of Rural Architecture
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    • v.1 no.3
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    • pp.3-12
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    • 1999
  • This research studies into the plane type classification and reviews its transition which has been used in the basic research of the traditional houses on the korean peninsula. The conclusions are as follows. Until now, plane type classification of traditional houses on the Korean peninsula were used to explain the characteristics of the region, or social class of the time. This classification was not used as a research tool to discover the hidden principals of the development process of traditional houses nor to attempt to restore the traditional habitation culture of the Korean peninsula.

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A history of bryological studies on the Korean Peninsula (한반도 선태식물 연구사)

  • Lee, Ji-Yeon;Choi, Byoung-Hee
    • Korean Journal of Plant Taxonomy
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    • v.42 no.2
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    • pp.109-115
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    • 2012
  • This study introduces the bryological history and literature of the Korean Peninsula. The French missionary Urban Faurie was the first person to collect Korean bryophytes at the beginning of the 20th century. Most of his bryophyte collections from Korea were studied and recorded by Jules Cardot (for mosses) and by Franz Stephani (for liverworts). Japanese studies of Korean bryophytes were described in chronological order. Hong Won Shic and Choe Du Mun carried out an inventory and flora research on bryophytes in South Korea. The most recent bryological studies of North Korea are also reviewed here as a reference.

Seismicity of the Korean Peninsula and Its Vicinity (한반도와 그 인접지역의 지진활동(地震活動))

  • Kim, So Gu
    • Economic and Environmental Geology
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    • v.13 no.1
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    • pp.51-63
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    • 1980
  • The seismicity of the Korean Peninsula and its vicinity is investigated temporally (2 A. D. to 1978) and spatially to evaluate the seismic risk and to understand the neotectonics around the peninsula. The study has been conducted using macrocosmic data obtained from historical literature, and instrumental records recorded by the Worldwide Network of Standardized Seismographs(WWNSS). The seismicity of the peninsula was active from the 13th through the 17th centuries. A seismic quiescence began at the onset of the 18th century, and has continued for the last 200 years. Presently, the seismicity region is found to be active again. The return periods are determined by a statistical method based upon the cumulative magnitude recurrence. They indicate that the seismic risk is greater in the south or west than in the north or east of the peninsula. Focal mechanism solutions demonstrate that the neotectonic stress distribution in the Japan Sea is greatly influenced by the subduction of the Pacific Plate under the Eurasian Plate or the Philippine Sea Plate, even though the predominate local paleotectonics is controlled by the spreading of the earth's crut.

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Classification of Obsidian Artifacts found in the Korean Peninsula using Sr isotope ratio (Sr 동위원소비를 이용한 한반도 흑요석의 분류 연구)

  • Cho Nam-Chul;Kang Hyung-Tae;Chung Gwang-Ryong
    • 한국문화재보존과학회:학술대회논문집
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    • 2005.11a
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    • pp.268-271
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    • 2005
  • Sixty-four obsidian artifacts found in the Korean Peninsula have been characterised by a study of their minor elements and Sr isotope ratio. The artifacts are from the following locations: Yondaedo Island; Yokjido Island; Sangnodaedo Island, Tongyeong, Gyeongnam; Dongsamdong, Busan; Songdo Island, Yeosu, Jeonnam; Suyanggae, Danyang, Chungbuk; Sangmuyongri, Yanggu, Gangwondo; Paektusan Mountain; Kyushu region, Japan. The study of minor elements and Sr isotope ratio recognised three distinct major groups. This result suggests that there are no correlations among the three groups whose provenances are different. But as a result of classification using Sr isotope ratio, obsidian artifacts found in the southern part of the Korean Peninsula classified two groups within C group. This research will furnish scientific datum to be able to mutual comparison of obsidians excavated from other site.

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