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131.
Abstract Paleostress of the Joseon Supergroup in the northeastern part of the Ogcheon Belt, South Korea, is reconstructed in the Jecheon–Danyang area with the help of calcite twinning. In the study area, the average twin thickness and intensity increase with the total twin strain increase. From the appearance of twins, the average twin thickness and intensity, and the total twin strain, it is estimated that calcite twins were produced under temperatures lower than 200°C. The maximum shortening axis in the study area changes orientation from northeast–southwest to NNW–SSE or northwest–southeast, and finally to north–south. We suggest these three distinct stages with different orientations of the maximum shortening axis can be correlated with: (i) the Paleozoic to Early Jurassic Songrim orogeny; (ii) the Early Jurassic to Late Jurassic Daebo orogeny; and (iii) the Cretaceous Bulgugsa orogeny. 相似文献
132.
Ocean Science Journal - To understand and clarify the geographic variations of the Korean sea raven, Hemitripterus villosus, we investigated the molecular and morphometric characteristics of 147... 相似文献
133.
Eun Jin Kim Sok Kuh Kang Sung-Tae Jang Jae Hak Lee Young Ho Kim Hyoun-Woo Kang Yeong Yeon Kwon Young Ho Seung 《Ocean Science Journal》2010,45(3):159-170
Satellite-derived sea surface temperature (SST) is validated based on in-situ data from the East China Sea (ECS) and western North Pacific where most typhoons, which make landfall on the Korean peninsula, are formed and pass. While forecasting typhoons in terms of intensity and track, coupled ocean-typhoon models are significantly influenced by initial ocean condition. Potentially, satellite-derived SST is a very useful dataset to obtain initial ocean field because of its wide spatial coverage and high temporal resolution. In this study, satellite-derived SST from various sources such as Tropical Rainfall Measuring Mission Microwave Imager (TMI), Advanced Microwave Scanning Radiometer for Earth Observing System (AMSR-E) and New Generation Sea Surface Temperature for Open Ocean (NGSST-O) datasets from merged SSTs were compared with in-situ observation data using an indirect method which is using near surface temperature for validation of satellite derived SST. In-situ observation data included shipboard measurements such as Expendable Bathythermograph (XBT), and Conductivity, Temperature, Depth (CTD), and Argo buoy data. This study shows that in-situ data can be used for microwave derived SST validation because homogeneous features of seawater prevail at water depths of 2 m to 10 m under favorable wind conditions during the summer season in the East China Sea. As a result of validation, root-mean-square errors (RMSEs) are shown to be 0.55 °C between microwave SST and XBT/CTD data mostly under weak wind conditions, and 0.7 °C between XBT/CTD measurement and NGSST-O data. Microwave SST RMSE of 0.55 °C is a potentially valuable data source for general application. Change of SST before and after typhoon passing may imply strength of ocean mixing due to upwelling and turbulent mixing driven by the typhoon. Based on SST change, ocean mixing, driven by Typhoon Nari, was examined. Satellite-derived SST reveals a significant SST drop around the track immediately following the passing of Typhoon Nari in October, 2007. 相似文献
134.
Risk-based assessment of arsenic-affected aquacultural water in blackfoot disease hyperendemic areas
Cheng-Shin Jang Kao-Hung Lin Chen-Wuing Liu Ming-Chao Lin 《Stochastic Environmental Research and Risk Assessment (SERRA)》2009,23(5):603-612
This work explored a risk-based arsenic (As) regulation in farmed pond water by ingesting tilapia (Oreochromis mossambicus) in blackfoot disease hyperendemic areas and discussed a rational As regulation in pond water. Monte Carlo analysis was used
to propagate the parameter uncertainty and to assess probabilistically regulation risks. A dynamic scheme of groundwater management
was proposed that curves of utilization ratios against As concentrations in groundwater were established based on the risk-based
regulation. The 5th to 95th percentiles of risks range from 3.5 × 10−7 to 6.0 × 10−5 via ingesting the farmed tilapia under the current As regulation in farmed pond water in Taiwan, 50 μg/L. To compare to inorganic
As regulation in drinking water, the current As regulation in farmed pond water does not pose a great threat to human health,
but it is unsafe. Therefore, this study suggests that the regulation of As in farmed pond water is revised to be 25 μg/L. 相似文献
135.
Hae Jin Jeong Se Hyeon Jang Nam Seon Kang Yeong Du Yoo Min Jeong Kim Kyung Ha Lee Eun Young Yoon éric Potvin Yeong Jong Hwang Jong Im Kim Kyeong Ah Seong 《Ocean Science Journal》2012,47(1):1-18
Species belonging to the genus Bysmatrum are peridinoid, thecate, photosynthetic dinoflagellates. The plate formula of Bysmatrum spp., arranged in a Kofoidian series, is almost identical to that of Scrippsiella spp. Bysmatrum spp., which were originally classified as Scrippsiella spp., but were transferred to the genus Bysmatrum spp. because of separation of the intercalary plates 2a and 3a by plate 3??. Whether this transfer from Scrippsiella spp. to Bysmatrum spp. is reasonable should be genetically confirmed. Dinoflagellates were isolated from 2 solar saltons located in western Korea in 2009?C2010 and 3 clonal cultures from Sooseong solar saltons and 2 clonal cultures from Garolim solar saltons were successfully established. All of these dinoflagellates were identified as Bysmatrum caponii based on morphology analysis by light and electron microscopy. The plates of all Korean strains of B. caponii were arranged in a Kofoidian series of Po, X, 4??, 3a, 7??, 6c, 4s, 5?, 0 (p), and 24??. When properly aligned, the ribosomal DNA (rDNA) sequences of the 3 Sooseong strains of B. caponii were identical, as were those of the 2 Garolim strains. Furthermore, the sequences of the 3 Sooseong strains were 0.01% different from those of the Garolim strains. However, the sequences of SSU rDNA of these Korean B. caponii strains were 9% different from that of Bysmatrum subsalsum and > 10% from that of any other dinoflagellate thus far reported. In the phylogenetic trees generated using SSU and LSU rDNA sequences, these Korean B. caponii strains formed a clade with B. subsalsum which was clearly divergent from the Scrippsiella clade. However, this Bysmatrum clade was phylogenetically close to the Protoperidinium and/or Peridinium clades. The results of the present study suggest that Bysmatrum spp. are markedly different genetically from Scrippsiella spp.. 相似文献
136.
This study investigates a freshwater budget in the Yellow and East China Seas (YECS) using a global f general circulation
model with a regional focus on the YECS. A freshwater budget analysis finds that major freshwater contributors over the YECS
change seasonally. In summer, freshwater inflow from Changjiang and positive precipitation minus evaporation (P-E) dominates
freshwater outflow across the boundaries around the YECS, resulting in net freshwater gain in the YECS. In winter, evaporation,
intensified by strong winds, dominates freshwater inflow from Changjiang and precipitation, while net freshwater transport
across the boundaries around the YECS is negligible, causing freshwater loss in total over the YECS. Although P-E has often
been assumed to be negligible by supposing that the annual mean of precipitation is nearly equal to that of evaporation, this
study suggests that P-E needs to be included in the seasonal freshwater budget in the YECS. 相似文献
137.
Evaluation of statistical gap fillings for continuous energy flux (evapotranspiration) measurements for two different land cover types 总被引:1,自引:0,他引:1
138.
Innovative water management is the first priority for the Saemangeum Project, a national project for a building global city as a frontrunner of green growth because there has been a big debate concerning the environmental problems (water quality, destruction of mud flats and so on). This study aims at identifying the change of water quality with time and analyzing the cause of its tendency. Results of this study verify that the importance of water quality is required when preparing water infrastructure for smart water use and may use for establishing a proper management plan in the Mangyeong River basins of the Saemangeum. 相似文献
139.
Lee Hye-Mi Cho Young-Ghan Jeung Hee-Do Jang Min-Seok Hwang Jee Youn Choi Kwang-Sik 《Ocean Science Journal》2020,55(4):573-579
Ocean Science Journal - As a suspension feeder, Manila clam Ruditapes philippinarum (A. Adams and Reeve 1850) plays a crucial role in the coastal soft bottom ecosystem in the temperate region,... 相似文献
140.
Sojung Park Mansik Choi Dongjun Jang Dongjin Joe Kyunggue Park Hyojin Lee Junsik Woo Taeha Kim Jongkyu Park 《Ocean Science Journal》2020,55(1):69-84
In this study, we investigated the spatial and temporal distribution of heavy metals and nutrients in Gyeonggi Bay, Korea, to determine their present statu 相似文献