• Title/Summary/Keyword: 백령도

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The First Record of Knorringia sibirica subsp. sibirica (Polygonaceae) in Korea (한반도 미기록 식물: 시베리아여뀌(마디풀과))

  • Choi, Hyeok-Jae;Park, Soo Hyun;Yang, Jong-Cheol;Lee, You-Mi;Ko, Jeong-En;Hong, Suk-Pyo
    • Korean Journal of Plant Taxonomy
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    • v.38 no.1
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    • pp.63-68
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    • 2008
  • We report a taxon of the unrecorded genus Knorringia (Polygonaceae) from Baengryeongdo, Ongin-gun, Incheon-si in the Korean peninsula. This taxon is K. sibirica (Laxm.) Tzvelev subsp. sibirica., has been known from Siberia, Mongolia and China. The new Korean name, 'Si-be-ri-a-yeo-kkwi', was given considering the species epithet and the type locality, Siberia. Description, illustration and photograph showing habitat were given.

Analysis of Asian Dust Transportation Time and Wind Farm in Baengnyeongdo Island and the Metropolitan Area (백령도와 수도권의 황사 수송 시간과 바람장 분석)

  • Jo, Won Gi;Kang, Dong-hwan;Park, Gyeong-Deok;Yang, Minjune
    • Journal of Environmental Science International
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    • v.31 no.6
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    • pp.525-533
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    • 2022
  • Baengnyeongdo, located within the Asian dust stream, is an ideal place to analyze Asian dust moving into the West Sea due to its low emission of artificial pollutants. Baengnyeongdo is being used to analyze the vertical distribution of dust from the lower atmosphere to the upper layer through remote observation. This study compared the ground concentration of dust between Baengnyeongdo and the metropolitan area, estimated the lag time of transport of Asian dust from Baengnyeongdo to the metropolitan area, and examined the homogeneity of upper winds using the rawinsonde method. The results showed that the cross correlation coefficient was higher and the lag time was shorter for each observation station when the distance from Baengnyeongdo was shorter. The upper wind at Baengnyeongdo is dominated by the west/northwest wind. It is the basis for the correlation of dust concentration between Baengnyeongdo and the metropolitan area located to the east. In the future, upper wind data and Asian dust concentration data over the West Sea and Baengnyeongdo are expected to contribute to research related to the movement and prediction of Asian dust and preparation for Asian dust in the metropolitan area.

Chemical Component of Mugwort (Artemisia princeps Pampanini) leaves Collected in Korea (수집약쑥의 유효성분 함량변이)

  • Ryu, Su-Noh;Han, Sang-Suk;Kim, Kwan-Su;Jeong, Hae-Gon
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.51 no.spc1
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    • pp.220-223
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    • 2006
  • Mugwort, Artemisia princeps Pampanini, has been used as natural medicine traditionally in the far east countries including Korea. This study was performed with the object of provoding basic data an leaf quality improvement in mugwort. The 210 mugwort were collected in 48 locations from 2004 to 2006, leaves of 210 genotypes collected were analyzed for eupatilin, jaceosidin and sesamin content. The eupatilin content was averaged to 43.8mg (100 g leaves) and ranged from 0 to 228.0 mg. The average jaceosidin and sesamin contents were 12.8 mg and 3.58 mg and the ranges of those were 0 to 73.8 mg and 0 to 6.56 mg, respectively. The eupatilin content of mugwort harvested in the western region was higher compared with those harvested in the resemble altitude of the southern and eastern of Korea.

Size selectivity of round traps for greenling (Hexagrammos otakii) in the western sea of Korea (원통형 통발에 대한 서해안 쥐노래미 (Hexagrammos otakii)의 망목선택성)

  • 신종근;박해훈
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.39 no.3
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    • pp.174-180
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    • 2003
  • This study investigated the size selectivity of the round traps for greenling (Hexagrammos otakii) in the western sea of Korea. The selection curve for the greenling from the experiments on Oct. 2000 and Ar. 2001 was fitted by Kitahara's method to a polynomial equation and two parameter logistic selection curve. The selectio curve of the latter was more reasonable than that of the former. The equation of selectivity curve obtained using a logistic function with least square method was , s(R)=1/1+exp(-1.1169R+6.4565), where R=1/m, and 1 and m are total length and mesh size, respectively. The size selectivity curve showed that the current regulated mesh size(35mm) in case of the round trap was close to the L50 (37.0mm) of the selection curve for the biological minimum length (21.4cm) of the greenling.

Discovery of the Ten Species of Subtropical-moths in Is. Daecheong, Korea (서해(西海) 대청도(大靑島)에서 발견된 아열대성(亞熱帶性) 나방류 10종)

  • Park, Kyu-Tek;Kang, Tae-Min;Kim, Min-Young;Chae, Min-Young;Ji, Eun-Mi;Bae, Yang-Seop
    • Korean journal of applied entomology
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    • v.45 no.3 s.144
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    • pp.261-268
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    • 2006
  • Ten species of subtropical macro-moths including Squamura sp. of Metarbelidae, were discovered at Is. Daecheong in the West Sea. The other nine species are Zeuzera sp., Setora baibarana (Matsumura), Toccolosida rubriceps Walker, Hyposidra talaca (Walker), Celerena signata Warren, Creatonotos transiens (Walker), Vitessa suradeva Moore, Callambulyx rubricosa (Walker), and Dodusa nobilis Walker, and they are mostly distributed in the subtropical area from the southern part of China to Borneo or Java.

Effects of Art & Culture Education on Behavior and Social Skill in Children : A Preliminary Study (문화예술교육이 아동의 행동과 사회기술에 미치는 영향 : 예비연구)

  • Jung, Yeon-Kyung;Park, Subin;Baik, Young;Kim, Kihyun;Shin, Min-Sup;Lee, Jin;Kim, Mi Kyoung;Kim, Bung-Nyun
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
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    • v.25 no.4
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    • pp.203-208
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    • 2014
  • Objectives : Art and culture education might play a good role in children's emotions ; however, few studies to verify this have been conducted. The objective of this study was to examine the effect of an art and culture education program on behavior and social skills in children aged 7-10 years. Methods : Fifteen children (mean age $7.31{\pm}0.95$ years) were recruited from a community center and participated in an art and culture education program. The participants received a once a week program for 17 sessions, and we compared scores on the Child Behavior Checklist (CBCL) and Social Skills Improvement System-Rating Scales (SSIS-RS) before and after intervention. Results : The participants' subscale scores of CBCL-aggressive behavior, social immaturity, internalizing behavior, externalizing behavior, total behavior problems and social skill scores on the SSIS-RS showed improvement (p<.05) after 15-weeks of the art and culture education program. Conclusion : These results suggest a positive effect of an art and culture education program on the reduction of externalizing and internalizing behaviors and improvement of social skills in children. Further prospective, controlled studies in large samples are needed in order to confirm our findings.

Distribution of broad-leveled evergreen plants on islands of Incheon, middle part of Yellow Sea (서해중부 인천 도서지역의 상록활엽식물 분포)

  • Lee, Jung-Hyun;Choi, Byoung-Hee
    • Korean Journal of Plant Taxonomy
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    • v.38 no.3
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    • pp.315-332
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    • 2008
  • To elucidate the distribution of broad-leaved evergreen plants of the central part of the Yellow Sea, we surveyed 136 islands of Incheon from May 2006 to March 2008. In the present survey, twelve broad-leaved evergreen species were found on 77 islands, which included 28 inhabited and 49 uninhabited islands. Among them, the most popular plants were the following: Euonymus japonicus Thunb., Elaeagnus macrophylla Thunb., Camellia japonica L., and Cyrtomium falcatum (L.f.) C. Presl. These plants were found growing on Baengnyeong Island, the northmost island among those surveyed, near $N 37^{\circ}60^{\prime}$. On the other hand the following four species are found up to Deokjeok-myeon only, near N $N 37^{\circ}10^{\prime}$: Hedera rhombea (Miq.) Bean,, Quercus acuta Thunb. ex Murray for. acuta, Neolitsea sericea (Blume) Koidz., and Trachelospermum asiaticum (Siebold & Zucc.) Nakai. However, these plants are usually found growing in the southern or southwestern coastal region of the Korean Peninsula. Thus the distribution of the broad-leaved evergreen plants growing on these high latitude islands might be influenced by a warm current of the Yellow Sea. The distribution of broad-leaved evergreen plants on each island is described.

Analysis of Stability Indexes for Lightning by Using Upper Air Observation Data over South Korea (남한에서 낙뢰발생시 근접 고층기상관측 자료를 이용한 안정도 지수 분석)

  • Eom, Hyo-Sik;Suh, Myoung-Seok
    • Atmosphere
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    • v.20 no.4
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    • pp.467-482
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    • 2010
  • In this study, characteristics of various stability indexes (SI) and environmental parameters (EP) for the lightning are analysed by using 5 upper air observatories (Osan, Gwangju, Jeju, Pohang, and Baengnyeongdo) for the years 2002-2006 over South Korea. The analysed SI and EP are the lifted index, K-index, Showalter stability index, total precipitable water, mixing ratio, wind shear and temperature of lifting condensation level. The lightning data occurred on the range of -2 hr~+1 hr and within 100 km based on the launch time of rawinsonde and observing location are selected. In general, summer averaged temperature and mixing ratio of lower troposphere for the lightning cases are higher about 1 K and $1{\sim}2gkg^{-1}$ than no lightning cases, respectively. The Box-Whisker plot shows that the range of various SI and EP values for lightning and no lightning cases are well separated but overlapping of SI and EP values between lightning and no lightning are not a little. The optimized threshold values for the detection of lightning are determined objectively based on the highest Heidke skill socre (HSS), which is the most favorable validation parameter for the rare event, such as lightning, by using the simulation of SI and EP threshold values. Although the HSS is not high (0.15~0.30) and the number and values of selected SI and EP are dependent on geographic location, the new threshold values can be used as a supplementary tool for the detection or forecast of lightning over South Korea.

Chemical Characteristics of PM1 using Aerosol Mass Spectrometer at Baengnyeong Island and Seoul Metropolitan Area (백령도 및 서울 대기오염집중측정소 에어로졸 질량 분석기 자료를 이용한 대기 중 에어로졸 화학적 특성 연구)

  • Park, Taehyun;Ban, Jihee;Kang, Seokwon;Ghim, Young Sung;Shin, Hye-Jung;Park, Jong Sung;Park, Seung Myung;Moon, Kwang Joo;Lim, Yong-Jae;Lee, Min-Do;Lee, Sang-Bo;Kim, Jeongsoo;Kim, Soon Tae;Bae, Chang Han;Lee, Yonghwan;Lee, Taehyoung
    • Journal of Korean Society for Atmospheric Environment
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    • v.34 no.3
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    • pp.430-446
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    • 2018
  • To improve understanding of the sources and chemical properties of particulate pollutants on the Korean Peninsula, An Aerodyne High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS) measured non-refractory fine particle ($NR-PM_1$) from 2013 to 2015 at Baengnyeong Island and Seoul metropolitan area (SMA), Korea. The chemical composition of $NR-PM_1$ in Baengnyeong island was dominated by organics and sulfate in the range of 36~38% for 3 years, and the organics were the dominant species in the range of 44~55% of $NR-PM_1$ in Seoul metropolitan area. The sulfate was found to be more than 85% of the anthropogenic origin in the both areas of Baengnyeong and SMA. Ratio of gas to particle partition of sulfate and nitrate were observed in both areas as more than 0.6 and 0.8, respectively, representing potential for formation of additional particulate sulfate and nitrate. The high-resolution spectra of organic aerosol (OA) were separated by three factors which were Primary OA(POA), Semi-Volatility Oxygenated Organic Aerosol (SV-OOA), and Low-Volatility OOA(LV-OOA) using positive matrix factorization (PMF) analysis. The fraction of oxygenated OA (SOA, ${\fallingdotseq}OOA$=SV-OOA+LV-OOA) was bigger than the fraction of POA in $NR-PM_1$. The POA fraction of OA in Seoul is higher than it of Baengnyeong Island, because Seoul has a relatively large number of primary pollutants, such as gasoline or diesel vehicle, factories, energy facilities. Potential source contribution function (PSCF) analysis revealed that transport from eastern China, an industrial area with high emissions, was associated with high particulate sulfate and organic concentrations at the Baengnyeong and SMA sites. PSCF also presents that the ship emissions on the Yellow Sea was associated with high particulate sulfate concentrations at the measurement sites.

Environmental Characteristics of Seawater and Sediment in Mariculture Management Area in Ongjin-gun, Korea (옹진군 어장관리해역의 수질 및 퇴적물 환경 특성)

  • Kim, Sun-Young;Kim, Hyung-Chul;Lee, Won-Chan;Hwang, Dong-Woon;Hong, Sok-Jin;Kim, Jeong-Bae;Cho, Yoon-Sik;Kim, Chung-Sook
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.19 no.6
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    • pp.570-581
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    • 2013
  • To improve productivity of aquaculture animals with management of culturing grounds, survey of mariculture management area in Ongjin-gun about water quality and sedimentary environment had been conducted on June, August and November in 2011. Water temperature in surface and bottom waters ranged from 9.49 to $24.14^{\circ}C$. Salinity and dissolved oxygen concentrations were in the range of 23.19~31.49 and 5.48~9.36 mg/L, respectively, depending on the variation of water temperature. The average concentration of COD was 1.57 mg/L and the concentrations of DIN and DIP showed entirely low level. As the result of grain size analysis, sand(56.66 %) and silt(34.60 %) were predominated. The Mz of sediment showed a variation of 2.59 to $6.62{\O}$ and sorting appeared to be poorly sorted. The concentrations of COD and IL in surface sediment ranged from 1.00 to $11.03mg/g{\cdot}dry$ and 0.72 to 5.29 %, respectively, which showed relatively good positive correlations. On the environmental assessment of trace metals in surface sediment, geoaccumulation index ($I_{geo}$) class indicated that sediments were not contaminated by most of metallic elements except Cr and As. Our result implies that this study area showed good water quality and sediments were not polluted by organic matters and metallic elements.