• Title/Summary/Keyword: southern Japan

Search Result 333, Processing Time 0.029 seconds

Effect of Typhoons on Contaminants Released from the Southern Sea around Fukushima of Japan (일본 후쿠시마 근해에서 방출된 오염물질에 미치는 태풍의 영향)

  • Hong, Chul-Hoon;Kim, Jinpyo
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.49 no.2
    • /
    • pp.234-240
    • /
    • 2016
  • We examined the diffusion of contaminants released from the southern coast around Fukushima, Japan, during the passage of typhoons using a three-dimensional numerical model (POM) to track diffusing radioactivity (RA) released from the nuclear power plant at Fukushima following the accident caused by the giant tsunami event in March 2011. Radioactive contaminants released during the passage of typhoons may have significantly affected not only Japanese but also Korean coastal waters. The model domain covered most of the northwestern Pacific including marginal seas such as the East/Japan Sea and the Yellow Sea. Several numerical experiments were conducted case studies focusing on the westward diffusion from the southern coast of Japan of contaminants derived from the source site (Fukushima) according to various attributes of the typhoons, such as intensity, track, etc. The model produced the following results 1) significant amounts of contaminants were transported in a westward direction by easterly winds favorable for generating a coastal air stream along the southern Japanese coast, 2) the contaminants reached as far as Osaka Bay with the passage of typhoons, forced by a 5-day positive sinusoidal form with a (right-) northward track east of Fukushima, and 3) the range of contamination was significant, extending to the interior of the East/Japan Sea around the Tsugaru Strait. The model suggests that contaminants and/or radioactivity released from Fukushima with the passage of typhoons can affect Korean waters including the northeastern East/Japan Sea around the Tsugaru Strait, especially when the typhoon tracks are favorable for generating a westward coastal air stream along the southern Japanese coast.

Phytoplankton Studies In Korean Waters II. Phytoplankton In The Coastal Waters Of Korea (한국해역의 식물플랭크톤에 관한 연구 II. 한국연안수역의 식물플랭크톤)

  • Choe, Sang
    • 한국해양학회지
    • /
    • v.2 no.1_2
    • /
    • pp.1-12
    • /
    • 1967
  • As a part of the primary production in the coastal water of Korea Seas on October-November 1964 and June-July 1965, quantitative phytoplankton materials by the net haul were obtained. This paper deals with a study on the distribution quantity and specific composition of the phytoplankton in the same waters. 76 species of diatoms and 8 species of dinoflagellates in October-November 1964, and 74 species of diatoms and 7 species of dinoflagellates in June-July 1965 were found. In autumn of 1964 and spring of 1965, there occured 90 species of diatoms and 10 species of dinoflagellates, and 60 species of diatoms and 5 species of dinoflagellates were encountered in both seasons. The maximal total quantity of phytoplankton were observed at Pohang (27,844,000 cell/㎥), Ulsan (25,186,000 cells/㎥) and Yosu (12,829,000 cells/㎥) in June-July 1965 and the smallest (16,000 cells/㎥) at Jukbyon in the coast of the Sea of Japan in October-November 1964. The coastal water of Korean Seas, as well as in the primary production study, is divided into four regions by the phytoplankton characters; coastal waters of the Sea of Japan, the east part of the Southern Sea, the west part of the Southern Sea and the Yellow Sea. The coastal waters of the Sea of Japan and the east part of the Southern Sea, in generally, are rich in the phytoplankton. In the coast of the Sea of Japan, species of Chaetoceros and Bacteriastrum prevail and uncommon in species of Coscinodiscus and Rhizosolenia. In the east part of the Southern Sea, on the other hand, uncommon in species of Chaetoceros and Bacteriastrum, and species of Coscinodiscus Rhizosolenia and hemiaulus indicus prevail. The coastal waters of the west part of the Southern Sea and the Yellow sea are both poor in the phytoplankton but Coscinodiscus species prevailed comparatively.

  • PDF

A study on the Upper Risen Architecture of Japan (일본(日本)의 고상식(高床式) 건축(建築)에 관(關)한 연구(硏究))

  • Lee, Byeong-Gun
    • Journal of architectural history
    • /
    • v.12 no.3
    • /
    • pp.19-38
    • /
    • 2003
  • The purpose of this study is to analyze the architectural character of the upper risen architecture(高床式 建築) in Japan. There are few upper risen architecture and architectural remains in Korea. Until now most of Korean researcher recognized that the upper risen architecture is southern regions' form. But there are a few numbers of upper risen buildings in northern regions of Korea and China. Therefore we need to compare northern and southern regions' upper risen architecture. The scope of this study is architectural remains, sites and present buildings about upper risen architecture in Japan. The period of this study is from third to eighth century. The method of this study is the analyses of site plan(the ratio of front and side length) and construction about Japanese Architecture. And then this study compare Japanese with other countries in Korean and Chinese upper risen architecture. Results of the study are below. 1. In Japan, upper risen architecture was introduced into southern regions(southern China and southeast Asia) with rice farming culture. 2. After introduced upper risen architecture, they were influenced many architectural technique of Korean and Chinese. 3. There were many technical improvement(such as foundation stone standing method, high technical wooden frame structure and adaptable triangle frame wall at moisture) the Japanese upper risen architecture in Nara Period(奈良時代). 4. As the results, I found out that there were many similarity Korea and Japan in upper risen architecture. I think that we will try continuous to study another regions' upper risen architecture in order to define conclusion.

  • PDF

Phytoplankton Studies in Korean Waters. IV. Phytoplankton in the Adjacent Seas of Korea (한국해역의 식물플랭크톤의 연구. IV. 동해, 남해 및 서해해역의 식물플랭크톤)

  • Choe, Sang
    • 한국해양학회지
    • /
    • v.4 no.2
    • /
    • pp.49-67
    • /
    • 1969
  • A quantitative phytoplankton study in Korean waters was commenced in 1964 as a part of the primary production studies of Koreans seas, and it was continued with the cruises for Cooperative Studies of the Kuroshio(C.S.K) in 1965-1968. Phytoplankton samples were taken by dipping about 500ml of sea water from the surface, and then fixed by ading neutralized formlin. This report deals with the results obtained during 1965-1966. I examined a total of 298 samples of surface phytoplankton collected in the wate neighboring Korea in the above-mentioned period, and detected 147 species of diatoms and 22 species of dinoflagellates. Among them 123 species of diatoms and 18 species of dinoflagellates occured in the Japan Sea region, 133 species of diatoms and 11 species of dinoflagellates occured in the Korea Strait region, and 49 species of diatom and 8 species of dinoflagellates occured in the Yellow Sea region. And thd phytoplankton standing crops are dept in a fair abundance in the Japan Sea area all the year round, and are poor in the Yellow Sea area. The seas surrounding Korea are divided into seven regions by the planktological characteristics; northern and southern parts of the Japan Sea, eastern, western and southern parts of the Korea Strait, southern and northern parts of the Yellow Sea. The representative of the phytoplankton community in each sea region is generalized as follows; northern part of the Japan Sea is dominant with Chaetoceros group, southern part of the Japan Sea is dominant with Chaetoceros group and Skeletonema costaum, eastern part of the Korea Strait is dominant with Chaetoceros group and Pleurosigma sp., southern part of the Korea Strait is dominant with Chaetoceros group and Rizosolenia group, western part of the Korea Strait is most poor in phytoplankton, southern part of the Yellow Sea is dominant with Pleurosigma sp. and Coscinodiscus group, and northern part of the Yellow Sea is dominant with Pleurosigma sp. and Eucampia zoodiacus. Chaetoceros curvisetus, Leptocylindrus danicus, Pleurosigma normanii, Thalassionema nitzschioides, Thalassiothrix flauenfeldii appeared all the year round in the neighboring sea of Korea. There were 24 species (18 species of diatoms and 6 species of dinoflagellates) of the pecuriar phytoplankton in the Japan Sea, 27 species (25 species of diatoms and 2 species of dinoflagellates) of that in the Korea, and 7 species (5 species of diatoms and 2 species of dinoflagellates) of that in the Yellow Sea, respectively.

  • PDF

Influences of Climate Factors and Water Temperature in Squid Spawning Grounds on Japanese Common Squid (Todarodes pacificus) Catches in the East (Japan) Sea

  • Lee, Chung-Il
    • Fisheries and Aquatic Sciences
    • /
    • v.10 no.3
    • /
    • pp.150-158
    • /
    • 2007
  • Data on squid catches, water temperature, and climatic factors collected for the Northwest and subtropical North Pacific were analyzed to examine the influence of oceanic and climatic conditions in spawning grounds on catches of Japanese common squid, Todarodes pacificus, in the East (Japan) Sea. The main spawning ground was divided into four sub-areas: the South Sea of Korea (R1), the southern waters off Jeju, Korea (R2), the southwestern part of Kyushu, Japan (R3), and the northern part of Okinawa, Japan (R4). Interannual and decadal fluctuations in water temperatures correlated well with squid catches in the East/Japan Sea. In particular, water temperatures at a depth of 50 to 100 m in sub-areas R3 and R4 showed higher correlation coefficients (0.54 to 0.59, p<0.01) in relation to squid catches in the East/Japan Sea than for R1 and R2, which had correlation coefficients of 0.40 or less (p>0.05). Air temperature and wind velocity fluctuations in each sub-area are correlated with water temperature fluctuations and were closely connected with variations in the surface mixed layers. Water, air temperatures and wind velocities at the main spawning grounds are linked to the Southern Oscillation Index (SOI) with higher signals in the ca. 2-4-year band. Strong changes in a specific band and phase occurred around 1976/77 and 1986/87, coincident with changes in squid catches.

Comparative analyses of Theileria sergenti isolated from Korea and Japan by southern hybridization and polymerase chain reaction (Sourthern hybridization과 중합효소연쇄반응을 이용한 한국과 일본의 Theileria sergenti 비교)

  • Chae, Joon-seok;Lee, Joo-mook;Kwon, Oh-deog;Lee, Seung-ok;Chae, Keon-sang;Onuma, Misao
    • Korean Journal of Veterinary Research
    • /
    • v.36 no.1
    • /
    • pp.187-193
    • /
    • 1996
  • The T sergenti DNA fragments used as probes of KTS1(2.4kb) and KTS3(1.5kb) were labeled with digoxigenin-11-dUTP for the Southern hybridization. T sergenti DNAs from different geographic locations(Korea; Chonbuk, Kyungbuk, Chungnam, Kangwon, Cheju island, Japan; Shintoku, Shintoku 9209, Shintoku 9201, Shintoku 9202, Shintoku 9102) which had been digested with Pst I and EcoR I were probed by the digoxigenin-11-dUTP-labeled KTS1 and KTS3. As the results, the samples from Chonbuk, Kyungbuk, Cheju island in Korea and Shintoku, Shintoku 9209, Shintoku 9201, Shintoku 9102 in Japan were positively reacted, but the others from the other locations not reacted. In the comformation test of T sergenti DNA from different geographic locations, all of the samples were positively detected by PCR amplification.

  • PDF

First Record of the Blenniid Fish Istiblennius dussumieri (Blenniidae, Perciformes) from Japan (일본산 청베도라치과 어류 1미기록종, Istiblennius dussumieri)

  • Lee, Chung-Lyul;Yoshihiko, Machida;Shigeru, Nagatomo
    • Korean Journal of Ichthyology
    • /
    • v.12 no.1
    • /
    • pp.20-24
    • /
    • 2000
  • The blenniid fish, Istiblennius dussumieri (Valenciennes) was reported on the basis of six specimens collected from rocky shores on the Yokonami Peninsula, Kochi Prefecture, southern Japan. This species was characterized by wavy, dusky stripes on its dorsal fin, 14 pectoral fin rays, 38 to 42 vertebrae, branched supraorbital cirrus, finger-like nasal cirrus, seven to ten vertical, dark bands on the body and canines absent on both jaws. Although the occurrence of this species may be due to larval transport by the Kuroshio Current, this is the first record of I. dussumieri from Japan represents a remarkable northern range extension of the species in the western Pacific Ocean.

  • PDF

Comparison of House Folkore in China, Korea and Japan (중·한·일 세 나라의 주거민속 연구 -조왕(竈王)-)

  • Kim, kwang-on
    • Korean Journal of Heritage: History & Science
    • /
    • v.34
    • /
    • pp.172-195
    • /
    • 2001
  • This research on the house folklore in China, Korea, and Japan is focusing on a kitchen God that is common in these three countries. This god originated in China and has subsequently influenced Korea and Japan. Today, all three countries use the same name of this kitchen god which is called Youngwang(竈王) as its name has been spelled in Chinese. In China, this kitchen god has been believed in two different ways. The Han people have developed their belief in Youngwang while another creed has been originated from other ethnic groups. Because of the particular house style with upper stories of ethnic groups in the southern and southeast areas of China, a kitchen fireplace is centered in the house. Han people in China also worship painted depictions of kitchen gods. And the ethnic groups believe it has three stone legs for a fire box. These differing beliefs has bad influenced on Korea and Japan. The kitchen god of Cheju island (off the south Korea coast) is believed to be almost the same as among the ethnic groups in China Interestingly, form of belief in the kitchen god in Okinawa (off the south coast of Japan) is almost identical as in the southern area of China Custom in China. Korea, and Japan regarding the kitchen god symbolized family values healing, initiating a new daughter-in-law to reveging the kitchen god, etc. are all the very similar. A fireplace and its fire are very important and, have many taboo, attached. Existing rich tales of kitchen gods are similar in the three countries. Moreover, people in the three countries, think that the clay or time plaster of the fireplace with bring good luck on New Year's eve. However, Korea kitchen god features one thing that is different from those China and Japan, that is that water symbolizes the kitchen god in Korea. A painted kitchen god as they are popular in China, has influenced only some Buddhist temples in Korea.

Coastal Mantle Communities in South Korea and Japan

  • Jung, Yong-Kyoo
    • The Korean Journal of Ecology
    • /
    • v.22 no.6
    • /
    • pp.317-324
    • /
    • 1999
  • A research on the coastal mantle communities in South Korea and Japan was carried out. This study was accomplished by using syntaxa and hierarchical system of the coastal mantle communities in South Korea and Japan in terms of the Zurich-Montpellier School's method. The coastal mantle communities in South Korea and Japan are included in the Rosetalia rugosae of northern type and the Viticetea rotundifoliae of southern type, which are characterized by Rosa rugosa and Vitex rotundifolia, respectively. The coastal mantle communities in South Korea are subordinated and are considerably corresponded to those which already identified in Japan. Each syntaxon of the coastal mantle communities in South Korea and Japan is briefly characterized floristically and ecologically, and their distribution is shown on maps.

  • PDF

A study on ancient Japanese costume (일본고대복식에 관한 연구 - 한반도의 경향을 중심으로 -)

  • 이은주
    • Journal of the Korean Home Economics Association
    • /
    • v.23 no.2
    • /
    • pp.1-11
    • /
    • 1985
  • RESULTS : Considering the archaeological evidences, it is velieved that the southern culture centered in KuSu and the Nothern Culture centered in the centeral Japan, specially at the estern Japan, existed together with the culture come through the southern regions and northern regions of Japanese Islands in Jomon Culture and Yayoi Culture period. As the center of territory moved from KuSu to GiNae in Tumulus Culture period, two-pieced style of the northern people who have already there became prevalent. The costume of Tumulus Culture period was developed from the coexistence f southern style and northern style to the merge of the two styles by the nomads come from Korean Peninsula. The riding costume was propagated by Koreans, and the style used in Korean Peninsula was more deeply influenced to the costume of the ruling class. The costume of Asuka Culture and MakuHo Culture period succeeds the costume of Tumulus Culture period without wide difference. But the costume of Korean Peninsula lied more deeply as the root of Japanese Costume. While the costume of the ruling class was changed into Tang's style, the costume of the masses was under the influence of the costume of Korean Peninsula. It became the base of current Japanese Folk Costume.

  • PDF