• Title/Summary/Keyword: Anmyondo

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Area Change and Coastline Attribute Distribution of Coastal Erosion Zone in Anmyondo (안면도의 면적 변화와 연안침식지역 해안선의 속성 분포)

  • Kim, Baeck-Oon
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.22 no.3
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    • pp.143-148
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    • 2010
  • Changes in coastline length and land area as well as coastline attribute distribution in Anmyondo were quantified by comparing topographic map produced in 1910's with coastline survey database compiled in 2003. Numerous reclamation has simplified complicated coastline, which resulted in reducing coastline length by 58% but increasing land area by 36%. In 2003, gravel coastline was mostly dominated. Coastline of tidal barrier also reached up to 33% of overall coastline. Gravel coastline occurred dominantly at the eastern side of Anmyondo, whereas sand coastline at the western side. An application of coastline attribute to coastal erosion zone required accurate coastline data, but it was conceived that the topographic map produced in 1910's was not useful for this purpose.

The Study of vegetation Structure and Soil Characteristics in Koelreuteria paniculata Communities of Anmyondo and Gunhung-Myon, Taean-Gun (안면도 및 태안군 근흥면 모감주나무군락의 식생구조 및 토양특성에 관한 연구)

  • Song, Ho-Kyung;Park, Kwan-Soo;Lee, Sun;Lee, Mi-Jung;Ji, Yoon-Eui
    • Korean Journal of Environmental Biology
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    • v.18 no.1
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    • pp.69-75
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    • 2000
  • The vegetation structure and soil characteristics in Koelreuteria paniculata communities of Taean-Gun and Anmyondo were studied. The Koelreuteria paniculata community in Anmyondo had two vegetation layers, lower-tree and herb layers, but the Koelreuteria paniculata community in Anmyondo had three vegetation layers, subtree, shrub, and herb layers. Also the Koelreuteria paniculata was only the species of subtree layers in the Koelreuteria paniculata community of Anmyondo, but the subtree layer in the Koelreuteria paniculata community of Taean-Gun consisted of Pinus thunbergii, Cornus walteri, Celtis jessoensis, Celtis sinensis, and Evodia danielii. The soil organic matter, total N, available P, CEC, and exchangeable K, Ca, Mg, and Na concentrations were greater in the two Koelreuteria paniculata community than in the adjacent forest. The range of soil pH in the two Koelreuteria paniculata communities were 6.3-7.0, but those in adjacent forests were 4.7-5.5. [Dierssen scale, Vegetation classification, Forest soil] .

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Structure and physical properties of the earth crust material in the middle of Korean Peninula(3) : Petrochemical study on the volcanic rocks in notheastern area o Anmyondo (한반도 중부권 지각물질의 구조와 물성연구(3) : 안면도 북동지역에 분포한 화산암에 대한 암석화학적 연구)

  • 정지곤;김원사;송무영
    • The Journal of the Petrological Society of Korea
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    • v.3 no.2
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    • pp.128-137
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    • 1994
  • The northeastern shore of the Anmyondo consists mainly of tuff, basalt, andesite and dacite. The K-Ar ages of the two mugearites are $89.4{\pm}2.4$ Ma and $91.9{\pm}2.3$ Ma which correspond to the middle Cretaceous age. Petrochemical reviews on the volanic rocks of the Cretaceous, Tertiary and Quaternary ages in the Korean Peninsula show that marked differences exist in chemical compositions according to the age of eruption.

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Water Quality and Phytoplankton in the Waters of Anmyondo Ggot-jee Swimming Beach (안면도 꽃지해수욕장 수질 및 식물플랑크톤)

  • Yeo, Hwan-Goo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.1
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    • pp.451-455
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    • 2012
  • Physicochemical water conditions and phytoplankton were investigated at Ggot-jee beach in Anmyondo, summer season of 2011. COD were sometimes recorded higher than 5.0mg/l and SS were always over 40mg/l. DO, pH and salinity were stable generally but low salinity was affected by heavy rainfall. In spite of relatively high concentrations of chlorophyll and phytoplankton standing stocks, discolored water phenomena(green or red tide) had not been occurred. A few dinoflagellate species were dominated in June and July, but general diatoms were dominant species of phytoplankton community in August. Escherichia coli concentrations were higher in August(>400CFU/100ml) than in July but it's not the level of hygienic problem.

Seasonal Change of Cambium Activity of Pine Trees at Different Growth Sites (생장지역에 따른 소나무 형성층 활동의 계절적 변화)

  • Park, So-Yeon;Eom, Chang-Deuk;Seo, Jeong-Wook
    • Journal of the Korean Wood Science and Technology
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    • v.43 no.4
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    • pp.411-420
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    • 2015
  • Despite of the same species there is a difference in the tree shape and its wood property due to quantitatiVe and qualitatiVe differences in wood cells by the intra-annual cambial actiVity. The purpose of this study was to proVide the fundamental database of intra-annual cambial seasonal actiVity for red pine in Sokwang-ri and Anmyondo for the determination of their wood qualities. As the results of intra-annual cambial actiVity, the initiation of cambial actiVity of red pine in the plots with Age Class V in Sokwang-ri was in the middle of April and it was at the beginning of April in all plots in Anmyondo. Only the plots with Age Class IX in Sokwang-ri showed relatiVely late initiation of cambial actiVity as between middle of May and middle of June. Except one plot with Age Class IX in Sokwang-ri all plots in both sites showed the same cessation of cambial actiVity as between middle and end of October. According to intra-annual cambial actiVity, the duration of cambial actiVity in Sokwang-ri is shorter than that of Anmyondo. On the other hand, the number of cell diVision of cambial actiVity in Sokwang-ri was more than those of Anmyondo. We could establish the database for intra-annual cambial actiVity for Sokwang-ri and Anmyondo to estimate their wood quality.

Analysis of Forest Resources in Anmyondo for Forest Management Harmonizing with Nature (자연친화적(自然親和的)인 산림경영(山林經營)을 위한 안면도(安眠島) 산림자원(山林資源) 분석(分析))

  • Song, Ho Kyung;Lee, Sun;Heo, Won Mu;Lee, Mi Jeong
    • Journal of Korean Society of Forest Science
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    • v.89 no.2
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    • pp.185-197
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    • 2000
  • This study was carried out to research structure of forest vegetation and site condition, and supply basic data for conservation of pine forest and ecologically sustainable forest management and control in Anmyondo area. The forest of Anmyondo were largely classified as four forest community : Pinus densiflora community, Pinus thunbergii community, Pinus rigida community, and Quercus variabilis community. Organic matter, total nitrogen, and other nutrients in soil of the study area were relatively low, and average soil pH was 4.9. Soil texture was sandy clay or heavy clay and so the aeration and permeability could be poor. In this study site, the methods such as the promotion of germination of pine seeds through removal of forest floor and inducement of natural regeneration through such method as regeneration under shelter wood would be better than the method such as afforestation after clear-cutting for conservation the pine forests. Also, it will be a good method to practice tending for hardwood species in the dominant areas by hardwood species.

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The Characteristics of the Aerosol Number Concentration Observed in Seoul and Anmyondo During an Yellow Sand Phenomenon (황사시 서울과 안면도의 대기 중 에어로졸 수농도 특성)

  • 전영신;김지영;최재천;신도식
    • Journal of Korean Society for Atmospheric Environment
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    • v.15 no.5
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    • pp.575-586
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    • 1999
  • The size-resolved number concentrations of aerosols ranging from 0.3 to 25 $mu extrm{m}$ were observed in Seoul and Anmyondo in the west coast of Korea during an Yellow Sand phenomenon in April 1998. Number size distributions of aerosols observed in both places are characterized by decrease in small particles of diameter less than 1${\mu}{\textrm}{m}$ and increase in large size between 1.35 and 10${\mu}{\textrm}{m}$ in heavy dust period. For particles in this size range, there was a good correlation between number concentrations observed in both places during the Yellow Sand episode. On the other hand, the number of small particles less than 0.82${\mu}{\textrm}{m}$ decreased, but the correlation between these particles in both places was enhanced during more intense dust period. The number of coarse particle larger than 10 ${\mu}{\textrm}{m}$ showed a distince diurnal variation without a significant change in amplitude, which was more visible in Seoul. It suggests that these coarse particles were more affected by local sources. Form these results, it was range of 1~10${\mu}{\textrm}{m}$ originated possibly from the dust source regions and the source signature depended on the degree of dust intensity.

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Three New Records of Thecate Hydroids from Korean Waters (한국미기록 컵히드라충류 3종)

  • Jung Hee Park
    • Animal Systematics, Evolution and Diversity
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    • v.14 no.1
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    • pp.59-66
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    • 1998
  • Obelia tottoni(Leloup, 1935), Sertularella polyzonias(Linnaeus, 1758) and Symplectoscyphus turgidus(Trak, 1857) of the identified thecate hydroid speces from Anmyondo, Kojedo and Chejudo were turned out to be new to the Korean fauna. Up to date the Korean thecate hydroid fauna consists of six subspecies and 109 species in eight families.

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The Radiative Characteristics of EUV-B over the Korean Peninsula and Exposure Time for Synthesizing Adequate Vitamin D (한반도 EUV-B 복사의 특성분석 및 적정 비타민D 합성을 위한 노출시간 산출)

  • Kwak, Min Kyoung;Kim, Jae Hwan
    • Atmosphere
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    • v.21 no.1
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    • pp.123-130
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    • 2011
  • In this study, we have analyzed the radiative characteristics of erythemal ultraviolet-B (EUV-B from 1999 to 2005) over the Korean Peninsula. EUV-B measured at Gangneung, Anmyondo, Mokpo, and Gosan represents the measurements from clean areas and that at Seoul represents from a polluted area. The magnitudes of EUV-B increase in proportion to the latitudinal decrease. Monthly mean variation of EUV-B at noon shows the maximum value of $158.5mWm^{-2}$ in August and the minimum value of $36.4mWm^{-2}$ in December in the clean areas. Seasonal mean diurnal variation of EUV-B shows a peak around noon (12:00 ~ 13:00 hr) and its intensity varies along with a season in order of summer > spring > fall > winter. The maximum value of $56.4mWm^{-2}$ in summer is three times higher than that in winter ($14.3mWm^{-2}$). The value of EUV-B in the polluted area is lower than that in the clean areas, resulting from the effects of the blocking, reflection, and scattering of EUV-B due to high concentrations of PM10. UV-B is an essential element to synthesize vitamin D in human body. 200 IU(International Unite) of vitamin D can be formed by an exposure of 6-10% of body surface area to 0.5 MED(Minimal Erythemal Dose). In order to form vitamin D, the calculated exposure times to EUV-B are 15 min. in spring, 12 min. in summer, 18 min. in fall, and 37 min. in winter for the clean areas and 16, 16, 24, and 37 min. for the polluted area.