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DOI： https://doi.org/10.1038/s41893-021-00720-8

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DOI： 10.1029/2019PA003593

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DOI： 10.1088/1748-9326/ab6d7d

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DOI： https://doi.org/10.1016/j.marpolbul.2019.07.033

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DOI： 10.1038/s41467-019-08316-9

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DOI： 10.1021/acs.est.8b04032

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DOI： 10.1016/j.marpolbul.2017.08.060

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DOI： 10.1016/j.marpolbul.2016.09.037

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DOI： 10.1016/j.marpolbul.2017.05.057

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DOI： 10.1016/j.marpolbul.2016.06.030

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DOI： 10.1016/j.marpolbul.2015.10.042

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DOI： doi:10.1002/2013JD020610

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DOI： DOI: 10.1021/es301362g

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DOI： doi: http://dx.doi.org/10.1175/JCLI-D-11-00391.1

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DOI： doi:10.1029/2010JD015484

Language：English   Publisher：Science of the Total Environment  

Microplastics (MPs) and plastic additive chemicals are emerging pollutants of great concerns around the world. Open dumping sites can be important sources of those pollutants in emerging countries, but little is known about their occurrence, distribution, transport pathway, and remediation approach. This study aimed to obtain the comprehensive dataset on plastic pollution in an open dumping site in Thailand, including (1) the polymer types and organic/inorganic plastic additives in plastic garbage, (2) horizontal distribution of MPs and plastic additives in the surface soil, (3) the effects of soil-capping treatment, and (4) the vertical transport. First, thirty-two plastic garbage collected from the dumping site were analyzed, and a total of 40 organic chemicals (mean: 1400,000 ng/g dw) and 7 heavy metals (mean: 2,030,000 ng/g dw) were identified. The burdens stored in the dumping site were estimated to reach to 3.3–18 tons for organic additives and 4.9–26 tons for heavy metals. In the surface soil analysis, 13 types of polymers in MPs, 20 elements, and 37 organic plastic additives were detected. The pollution levels were significantly higher near the dumping site than at control sites, indicating that the open dumping site is a point source of MPs and plastic additives. Interestingly, a significantly positive correlation was found between the concentrations of MPs and organic additives in soil. This suggests that MPs act as carriers of plastic-derived chemicals. Soil-capping treatment (including removal of some trash) drastically mitigated the contaminant levels in the surface soil, indicating this treatment is one of the effective approaches to control the horizontal distribution of MPs and plastic additives. However, soil core analyzes implied that the vertical transport is still continued even after soil-capping treatment. Our findings provided the comprehensive dataset to support for understanding plastic pollution in the open dumping site.

DOI： 10.1016/j.scitotenv.2024.174827

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Language：English   Publisher：Marine Pollution Bulletin  

Marine plastic pollution is progressing worldwide and will become increasingly serious if plastic waste emissions continue at the current rate or increase with economic growth. Here, we report a particle tracking-based probability distribution model for predicting the abundances of marine macroplastics and microplastics, which undergo generation, transport, and removal processes in the world's upper ocean, under various scenarios of future land-to-sea plastic waste emissions. To achieve the Osaka Blue Ocean Vision, which aims to reduce additional pollution by marine plastic litter to zero by 2050, plastic waste emission in ∼2035 should be reduced by at least 32 % relative to 2019. It is necessary to take stringent measures such as ‘system change scenario’ or ‘improve waste management scenario’ proposed in previous studies to reduce the marine plastic pollution by 2050.

DOI： 10.1016/j.marpolbul.2024.116791

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

DOI： 10.1016/j.wasman.2024.06.026

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

DOI： 10.1016/j.scitotenv.2024.172837

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Publisher：Science of the Total Environment  

Polystyrene foam is widely used due to its lightweight, impact resistance, and excellent thermal insulation properties. Meanwhile, weak adhesion between beads in polystyrene foam leads to fragmentation, generating a substantial amount of microplastics (<5 mm). Such polystyrene foam debris littered on beaches diminishes the aesthetic value of coastal areas, negatively impacting tourism. Due to its density lower than other plastics, polystyrene foam macroplastics float on the sea surface and, thus, they are significantly influenced by wind drag during oceanic transport. In contrast, polystyrene foam microplastics drifting beneath the sea surface are carried mostly by ocean currents. These properties of polystyrene foam macroplastics and microplastics hinder the elucidation of their transport, distribution, and fate in nature, despite their potential to adversely impact marine ecosystems. To elucidate the generation, transport, and fragmentation processes of polystyrene foam ocean plastics, we conducted concurrent visual observations and surface net towing from seven training vessels around Japan during 2014–2020. Overall, the abundances of polystyrene foam ocean plastics were higher in the Sea of Japan than in the North Pacific south of Japan. The average abundances of polystyrene foam microplastics and macroplastics were 0.33 pieces/m3 and 0.45 pieces/km, respectively, over the entire sea area around Japan. In the Sea of Japan, the peak abundances of polystyrene foam macroplastics occurred in upstream of the Tsushima Current, while the peak for microplastics occurred downstream, suggesting that continuous fragmentation occurred during transport between the two peaks. Backward-in-time particle tracking model experiments suggested that the sources of polystyrene foam macroplastics observed in the Sea of Japan included aquaculture buoys and styrene debris beached around the Tsushima Strait. The present study demonstrated that reducing the release of polystyrene foam aquaculture floats will likely diminish the abundance of ocean plastics in the Sea of Japan.

DOI： 10.1016/j.scitotenv.2024.171421

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Publishing type：Research paper (scientific journal)  

DOI： 10.1002/lob.10641

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Language：English   Publishing type：Research paper (scientific journal)  

Southeast Asian countries are recognized as significant contributors to the discharge of abundant plastic waste into the ocean. In this study, we conducted neuston net surveys on Si Chang Island of the Gulf of Thailand, a coral reef conservation area, to determine the presence of microplastic (MP) pollution. The survey, conducted during the wet (southwesterly monsoon), transition, and dry seasons (northeasterly monsoon), revealed that the MP abundance was in the range of 0.02-42.46 particles m-3. The precipitation, wind, and current direction induced by monsoons influenced the abundance and distribution of MP, presenting a significant seasonality. The cluster analysis for colors and polymer types of MPs suggested that the origin of plastic particles is diverse. Based on our results, a proposal for the generation, sources, and pathways for MPs in the Gulf of Thailand is presented: 1) plastic wastes exposed to strong UV light during the dry season get fragmented around the river, and 2) heavy rains wash away the particles during the wet season. This proposal is applicable to tropical regions, including the Gulf of Thailand. Therefore, this paper concluded that ocean currents induced by monsoons and the unique climate, resulting in the generation of MPs on land, increase MP presence and distribution in the ocean surrounding Southeast Asia countries. Furthermore, coral reef ecosystems can be particularly threatened by MPs in these areas. So, an increase in MP monitoring on coral ecosystems from Thailand and the world is highly recommended.

DOI： 10.1016/j.scitotenv.2024.170787

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Publisher：Polymer Journal  

The photooxidative degradation and fragmentation behaviors of isotactic polypropylene (itPP) were simulated in laboratory after various postconditions, such as quenching, gradual cooling and drawing, using an artificial weathering machine and a blender. The crystallinity of the itPP films and orientation of the molecular chains play important roles in the photooxidation of the itPP films. Compared to quenched itPP films with the same ultraviolet (UV) exposure time, highly oriented itPP films and gradually cooled itPP films with higher crystallinity exhibited a lower rate of photooxidative degradation. To clarify the photooxidative degradation mechanism, the surface morphology, chemical structure, and microstructure of the UV-exposed itPP films were investigated using scanning electron microscopy, infrared spectroscopy, differential scanning calorimetry, and wide- and small-angle X-ray scattering. Photooxidative degradation was inhibited as the orientation degree of the itPP film increased. These results indicate that photooxidation likely occurs in the amorphous phase of itPP. Oriented molecular chains effectively slowed the photooxidative degradation of the itPP films. The artificial fragmentation test of UV-exposed itPP films showed that itPP films with lower crystallinity and orientation degrees were crushed into microplastics that were much smaller in size than those with higher crystallinity or orientation degrees.

DOI： 10.1038/s41428-023-00876-4

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Language：English   Publisher：Marine Pollution Bulletin  

Although the Indian Ocean receives a large amount of land-based plastic waste, the studies on pathways of riverine plastic debris are limited to date. Therefore, a particle tracking model that included ocean surface currents, horizontal diffusion, Stokes drift, windage, and beaching/re-drifting processes was developed to reproduce the behavior of riverine plastic debris in the Indian Ocean. The modeled particles were released in the model domain based on riverine plastic debris database. The maximum abundance of beached particles occurred during the southwesterly monsoon season, particularly in the Bay of Bengal. The particles released from the rivers were trapped in the northern Indian Ocean unless both Stokes drift and windage were excluded from transportation velocity. These results suggest that the riverine plastic debris was trapped in the northern Indian Ocean until it fragmented into less buoyant small microplastics drifting in the subsurface layer, free from windage and Stokes drift at increasing depths.

DOI： 10.1016/j.marpolbul.2023.115985

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Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1038/s41428-023-00876-4

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

DOI： 10.1016/j.scitotenv.2023.167329

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Language：English   Publishing type：Research paper (scientific journal)  

Multirotor drones can be efficiently used to monitor macro-litter in coastal and riverine environments. Litter on beaches, dunes and riverbanks, along with floating litter on coastal and river waters, can be spotted and mapped from aerial drone images. Items detection and classification are prone to image resolution, which is expressed in terms of Ground Sampling Distance (GSD). The GSD is determined by drone flight altitude and camera properties. This paper investigates what is a suitable GSD value for litter survey. Drone flight altitude and camera setup should be chosen to obtain a GSD between 0.5 cm/px and 1.25 cm/px. Within this range, the lowest GSD allows litter categorization and classification, whereas the highest value should be adopted for a coarser litter census. In the vision of drawing up a global protocol for drone-based litter surveys, this work sets the ground for homogenizing data collection and litter assessments.

DOI： 10.1016/j.marpolbul.2023.115521

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Language：English   Publisher：Science of the Total Environment  

Marine debris comprising single-use plastic products (SUPs) is ubiquitous in Asian coastal waters, but there is little information on the types of polymers and the concentrations of plastic additives such waste products contain. In this study, 413 SUPs randomly collected from 4 Asian countries between 2020 and 2021 were analyzed to obtain specific polymer and organic additive profiles. Polyethylene (PE), coupled with external polymers, was prominent in the inside of the SUPs, whereas polypropylene (PP) and polyethylene terephthalate (PET) were prevalent in both the insides and outsides of the SUPs. The use of different polymers in the insides and outsides of PE SUPs implies specific and complicated recycling systems are required to maintain the purity of the products. Phthalate plasticizers including dimethyl phthalate (DMP), diethyl phthalate (DEP), diisobutyl phthalate (DiBP), dibutyl phthalate (DBP), and di(2-ethylhexyl) phthalate (DEHP), and the antioxidant butylated hydroxytoluene (BHT) were prevalent in the SUPs (n = 68). High concentrations of DEHP were detected in PE bags from Myanmar (820,000 ng/g) and Indonesia (420,000 ng/g), which were an order of magnitude greater than the concentrations in PE bags collected in Japan. SUPs containing high concentrations of organic additives may be the primary source of harmful chemicals in the environment, and should be responsible for their ubiquitous distribution in ecosystems.

DOI： 10.1016/j.scitotenv.2023.163983

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Language：English   Publishing type：Research paper (scientific journal)  

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DOI： https://doi.org/10.1016/j.seares.2023.102406

Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

Publisher：Jurnal Ilmiah Perikanan dan Kelautan  

Microplastic pollution in beach sediments has been studied intensively worldwide, but there are limited studies in the beach areas of the eastern Java Island, Indonesia. This study aimed to identify the distribution of microplastic in four beaches in Indonesia: Bahak, Pesona, Tambakrejo, and Balekambang. The first two beaches are located in the north of Java Island and influenced by the east Java Sea, while the last two are located in the south and influenced by the Indian Ocean. Sediment samples were collected along the strandline inside the 1 × 1 m transect quadrate in the top 5 cm using a stainless-steel shovel. Microplastic and granulometry analyses were conducted to obtain microplastic and sediment grain size data, respectively. Physical parameters of the beaches, such as wind, wave, and ocean current, were calculated using Copernicus and NASA (PODAAC), respectively. The total abundance of microplastic ranged from 54.7 ± 48.6 to 103.3 ± 4.7 particles kg-1 with the following descending order: Bahak > Pesona > Tambakrejo > Balekambang. Although there was no statistically significant difference in microplastic concentrations among the beaches, the beaches connected to the Java Sea accumulated more microplastics than the ones connected to the Indian Ocean. Fiber and blue were the dominating type and colors of microplastic. The results confirm that the distribution of microplastic is associated with the morphology of the beaches and the local source.

DOI： 10.20473/jipk.v15i2.41065

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Publisher：Journal of Sea Research  

The abundance of microplastics fragments with sizes larger than 0.30–0.35 mm is measured during two research cruises in the tropical Northwestern Pacific Ocean and inside the Indonesian seas. The fragments are confirmed to be primarily nylon, polyester, and polyethylene etc. microplastics in the western Pacific by Fourier transform infrared spectroscopy (FT-IR), whereas dominated by polyethylene in the Indonesian seas based on Raman spectrum analyses. The abundance of the microplastics is found to be very low (<0.018 particles m−3) in the surface waters of the North Equatorial Current and the Kuroshio, suggesting no westward extension of the Great Pacific Garbage Belt and lack of microplastics accumulation due to mass convergence in the western boundary current. The abundances of the microplastics in the Makassar Strait of the Indonesian seas are found to be higher by an order of magnitude than those in the Northwestern Pacific, believed to be due to river run-offs carrying microplastics from nearby lands. The largest microplastics abundance is found in the northeastern Maluku Sea, where concurrent current measurements suggest a branch of the Indonesian Throughflow bringing accumulated microplastics from the eastern Indonesian seas into the convergent area of multiple strong currents. The study underlines the importance of ocean circulation in the microplastics distributions and transportation, and suggests the importance of high-resolution spatial mapping in the budget analysis of global microplastics distribution.

DOI： 10.1016/j.seares.2023.102406

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Language：English   Publisher：Marine Pollution Bulletin  

The knowledge of microplastic (MP) age could aid the deduction of the origin and fate of a fragment carried by ocean currents over long time periods and distances. The present study developed a novel method to estimate the age of MPs (i.e., UV radiation exposure time) using the oxidation level of polyethylene (i.e., carbonyl index) from infrared spectrometry, ultraviolet erythemal radiation (UVER) data, and ambient seawater temperatures. Accelerated and outdoor exposure experiments were conducted to establish relationships among the temporally integrated UVER, ambient temperature, and carbonyl index. Thereafter, the age of MPs was computed, with Miyakojima Island serving as the reference location. The estimated ages of MPs collected from the western North Pacific Ocean ranged from 1 to 3 years, and those MPs from nearshore waters ranged from 0 to 5 years.

DOI： 10.1016/j.marpolbul.2023.114951

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DOI： 10.1016/j.marpolbul.2023.114818

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Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

The fate of mismanaged plastic waste released into oceans (ocean plastics) remains a topic of debate, where the mass imbalance between the leakage and abundance in the world's oceans appears paradoxical. In the present study, a budget for ocean plastic mass was estimated based on a combination of numerical particle tracking and linear mass-balance models, both validated using a worldwide ocean plastic dataset. Integrating the time series of worldwide macroplastic emission from both rivers and the fisheries industry over the period 1961–2017 yielded a total mass of 25.3 million metric tonnes (MMT). Macro- and microplastics currently floating in the oceans, and microplastics on beaches, each account for 3–4% of the ocean plastics emitted worldwide to date. Overall, 23.4% of ocean plastics were macroplastics on beaches. Meanwhile, 66.7% of ocean plastics were heavier than seawater or microplastics removed from the upper ocean and beaches, which are difficult to monitor under current observation frameworks adopted worldwide. However, the present study on ocean plastics suggested that the whole ocean plastics accounted for only 4.7% of mismanaged plastic waste (542.2 MMT) generated between the 1960s and today.

DOI： 10.1016/j.scitotenv.2022.153935

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Publisher：Frontiers in Marine Science  

DOI： 10.3389/fmars.2021.827907

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Publisher：Ilmu Kelautan: Indonesian Journal of Marine Sciences  

Microplastics have been found in the marine environment worldwide. Due to their very small size, it could be ingested by marine organisms from small size plankton to big size fish. The aim of this study is to assess the variability of microplastics in three different organs (gills, gastrointestinal tracts, and muscles) of commercial fishes in five different fishing ports in East Java Province, Indonesia. A total of 137 fish samples from 14 species were extracted to identify the types of microplastics. The microplastics found in the fish samples were mostly dominated by fiber, fragments, and a little quantity of film. In most species, the gills accumulated more microplastics compared to the gastrointestinal tracts and muscles. Gill is the organ that is highly exposed to the environmental conditions, therefore, it is more susceptible to the microplastic contamination. The results showed that there was an inverse relationship between the size of the fish and the occurrence of microplastics (P<0.05). Small size Sardinella lemuru contained more microplastics than bigger size fish such as Katsuwonus pelamis. The variability of microplastics found in this study showed important factors such as habitat, fish size, feeding behavior, and organ function which influenced the ingestion process of microplastic. This study also revealed the presence of microplastics were not only in the gills and gastrointestinal tracts of fish, but also in its muscles. Since this study targeted commercial fishes, further research is needed to know the possible impact on human consumption of fish containing microplastics.

DOI： 10.14710/ik.ijms.27.3.199-214

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DOI： 10.3389/fmars.2019.00447

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DOI： 10.3389/fmars.2017.00030

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DOI： 10.1007/s10872-016-0377-x

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DOI： 10.1175/JTECH-D-15-0113.1

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DOI： 10.1175/JPO-D-15-0167.1

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DOI： 10.1016/j.marpolbul.2016.03.038

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DOI： doi:10.1002/2015JC011565

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DOI： 10.1002/2015JC011565

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DOI： 10.1038/srep10167

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DOI： doi:10.1029/2009JC005818

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DOI： doi:10.1029/2007JC004248

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Ballooning of river-plume bulge and its stabilization by tidal currents

Language：Japanese   Publishing type：Research paper (scientific journal)  

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Driving mechanism of band structure of mean current over the continental shelf

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Intrusion of less saline shelf water into the Kuroshio subsurface layer in the East China Sea

Language：English   Publishing type：Research paper (scientific journal)  

Seasonality of Kuroshio transport revealed in a Kuroshio assimilation system

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Seasonal variability in the circulation pattern and the residence time of Suo-Nada

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A numerical study on the Changjiang Dilluted Water in the Yellow and East China Seas

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Current structure and behavior of the river plume in Suo-Nada

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Circulation and Material Transport in Suo-Nada During Spring and Summer Season

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Annual variation of the Kuroshio transport in a two-layer numerical model with a ridge

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Freshwater and Temperature transports through the Tsushima-Korea Straits

Language：Japanese   Publishing type：Research paper (scientific journal)  

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The circulation of the upper and intermediate layers of the South China Sea

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Low Frequency Temperature Variability at Fukue Island located southwest of the Tsushima Straits

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Two-layer model on the branching of the Kuroshio southwest of Kyushu, Japan

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On the origin of the Tsushima Warm Current and its seasonality

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The Taiwan-Tsushima Warm Current System. -its path and the transformation of the water mass in the East China Sea-

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Event date： 2016.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：鹿児島大学　郡元キャンパス   Country：Japan  

Event date： 2016.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：鹿児島大学　郡元キャンパス   Country：Japan  

Event date： 2016.9

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Venue：鹿児島大学　郡元キャンパス   Country：Japan  

Event date： 2016.9

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Venue：鹿児島大学　郡元キャンパス   Country：Japan  

Event date： 2016.3

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Venue：東京大学　本郷キャンパス   Country：Japan  

Event date： 2016.3

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Venue：東京大学　本郷キャンパス   Country：Japan  

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Venue：東京大学　本郷キャンパス   Country：Japan  

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Venue：東京大学　本郷キャンパス   Country：Japan  

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Venue：東京大学　本郷キャンパス   Country：Japan  

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Venue：東京大学　本郷キャンパス   Country：Japan  

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Venue：東京大学　本郷キャンパス   Country：Japan  

Event date： 2015.9

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Venue：愛媛大学城北キャンパス   Country：Japan  

Event date： 2015.9

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Venue：愛媛大学城北キャンパス   Country：Japan  

Event date： 2015.9

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Venue：愛媛大学城北キャンパス   Country：Japan  

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Venue：愛媛大学城北キャンパス   Country：Japan  

Event date： 2015.3

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2015.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2015.3

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Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2015.3

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Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2014.3

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Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2014.3

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Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2014.3

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Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2014.3

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Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2014.3

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Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2014.3

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Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2013.9

Language：Japanese  

Venue：北海道大学札幌キャンパス   Country：Japan  

Event date： 2013.9

Language：Japanese  

Venue：北海道大学札幌キャンパス   Country：Japan  

Event date： 2013.9

Language：Japanese  

Venue：北海道大学札幌キャンパス   Country：Japan  

Event date： 2013.9

Language：Japanese  

Venue：北海道大学札幌キャンパス   Country：Japan  

Event date： 2013.3

Language：Japanese  

Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2013.3

Language：Japanese  

Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2013.3

Language：Japanese  

Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.9

Language：Japanese  

Venue：東海大学 清水キャンパス   Country：Japan  

Event date： 2012.5

Language：English  

Country：Japan  

Event date： 2012.5

Language：English  

Country：Japan  

Event date： 2012.3

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：筑波大学   Country：Japan  

Event date： 2012.3

Language：Japanese  

Venue：筑波大学   Country：Japan  

Event date： 2012.3

Language：Japanese  

Venue：筑波大学   Country：Japan  

Event date： 2012.3

Language：Japanese  

Venue：筑波大学   Country：Japan  

Event date： 2012.3

Language：Japanese  

Venue：筑波大学   Country：Japan  

Event date： 2012.3

Language：Japanese  

Venue：筑波大学   Country：Japan  

Event date： 2012.3

Language：Japanese  

Venue：筑波大学   Country：Japan  

Event date： 2012.3

Language：Japanese  

Venue：筑波大学   Country：Japan  

Event date： 2012.3

Language：Japanese  

Venue：筑波大学   Country：Japan  

Event date： 2012.2

Language：English  

Country：United States  

Event date： 2012.2

Language：English  

Country：United States  

Event date： 2011.12

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.11

Language：Japanese  

Venue：名古屋大学   Country：Japan  

Event date： 2011.11

Language：English  

Country：United States  

Event date： 2011.11

Language：English  

Country：United States  

Event date： 2011.9

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.9

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.9

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.9

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.9

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.9

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.9

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.9

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.9

Language：Japanese  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2011.9

Language：Japanese  

Venue：関西学院大学   Country：Japan  

Event date： 2011.8

Language：Japanese  

Country：Japan  

Event date： 2011.8

Language：English  

Country：Japan  

Event date： 2011.7

Language：Japanese  

Venue：熊本県立大学   Country：Japan  

Event date： 2011.7

Language：Japanese  

Venue：熊本県立大学   Country：Japan  

Event date： 2011.6

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2011.6

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Country：China  

Event date： 2011.6 - 2011.7

Language：English  

Country：Australia  

Event date： 2011.6

Language：English  

Country：Australia  

Event date： 2011.5

Language：English  

Country：Italy  

Event date： 2011.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学柏キャンパス   Country：Japan  

Event date： 2011.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学柏キャンパス   Country：Japan  

Event date： 2011.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛媛大学   Country：Japan  

Event date： 2010.9

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2010.9

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2010.9

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2010.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農業大学生物産業学部   Country：Japan  

Event date： 2010.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農業大学生物産業学部   Country：Japan  

Event date： 2010.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農業大学生物産業学部   Country：Japan  

Event date： 2010.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農業大学生物産業学部   Country：Japan  

Event date： 2010.6

Language：English   Presentation type：Oral presentation (general)  

Country：Taiwan, Province of China  

Event date： 2010.6

Language：Japanese  

Venue：中部大学   Country：Japan  

Event date： 2010.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2010.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京海洋大学品川キャンパス   Country：Japan  

Event date： 2010.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛媛大学   Country：Japan  

Event date： 2009.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都大学   Country：Japan  

Event date： 2009.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都大学   Country：Japan  

Event date： 2009.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都大学   Country：Japan  

Event date： 2009.4

Language：English   Presentation type：Oral presentation (general)  

Country：Korea, Republic of  

Event date： 2009.4

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Korea, Republic of  

Event date： 2009.4

Language：English   Presentation type：Oral presentation (general)  

Country：Korea, Republic of  

Event date： 2009.4

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学   Country：Japan  

Event date： 2009.4

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学   Country：Japan  

Event date： 2009.4

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学   Country：Japan  

Event date： 2009.4

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学   Country：Japan  

Event date： 2009.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛媛大学   Country：Japan  

Event date： 2008.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学（長崎市）   Country：Japan  

Event date： 2008.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学（長崎市）   Country：Japan  

Event date： 2008.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学（長崎市）   Country：Japan  

Event date： 2008.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学（長崎市）   Country：Japan  

Event date： 2008.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学（長崎市）   Country：Japan  

Event date： 2008.11

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：気象庁　気象研究所   Country：Japan  

Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：広島国際大学　呉キャンパス   Country：Japan  

Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：広島国際大学　呉キャンパス   Country：Japan  

Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：広島国際大学　呉キャンパス   Country：Japan  

Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：広島国際大学　呉キャンパス   Country：Japan  

Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：広島国際大学　呉キャンパス   Country：Japan  

Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：広島国際大学　呉キャンパス   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：東京水産大学  

Presentation type：Oral presentation (general)  

Venue：東京水産大学   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：東京水産大学   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：北海道大学   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：北海道大学   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：北海道大学   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：北海道大学  

Venue：北海道大学   Country：Japan  

Venue：北海道大学   Country：Japan  

Presentation type：Oral presentation (general)  

Country：Japan  

Namba,T. and A. Isobe"Detection of the current path in the South China Sea using the water mass analysis" ,10th PAMS/JECSS workshop

Country：Japan  

Isobe,A. "Two-layer model on the branching of the Kuroshio southwest of Kyushu", 10th PAMS/JECSS workshop

Presentation type：Oral presentation (general)  

Venue：東京水産大学  

Presentation type：Symposium, workshop panel (public)  

Venue：東京水産大学  

Presentation type：Oral presentation (general)  

Venue：水産大学校  

Presentation type：Oral presentation (general)  

The seasonal variation of the Kuroshio volume transport in the wind-forced two-layer model with a ridge

Presentation type：Oral presentation (general)  

Two-layer model on the branching of the Kuroshio southwest of Kyushu, Japan

Presentation type：Oral presentation (general)  

Warm and saline plume branching from the Kuroshio is a source of the Tsushima Current?

Annual Variation of the Kuroshio Transport in a Two-layer Numerical Model with a Ridge

Presentation type：Oral presentation (general)  

Country：Korea, Republic of  

Fresh water and temperature transports through the Tsushima-Korea Straits

Presentation type：Oral presentation (general)  

Country：Korea, Republic of  

Short time variability of the Kuroshio front in the East China Sea

Presentation type：Oral presentation (general)  

Venue：東京  

Presentation type：Oral presentation (general)  

Venue：東京  

Presentation type：Oral presentation (general)  

Venue：東京  

Presentation type：Oral presentation (general)  

Circulation patterns in Suo Nada during spring and summer season

Presentation type：Oral presentation (general)  

Country：Korea, Republic of  

MATERIAL TRANSPORT IN SUO NADA DURING SPRING AND SUMMER SEASON

Presentation type：Oral presentation (general)  

Venue：静岡  

Presentation type：Oral presentation (general)  

Venue：静岡  

Presentation type：Oral presentation (general)  

Venue：静岡  

Presentation type：Oral presentation (general)  

Venue：静岡  

Presentation type：Oral presentation (general)  

Venue：静岡  

Presentation type：Oral presentation (general)  

Venue：東京  

Presentation type：Oral presentation (general)  

Venue：日本海洋学会春季大会  

Presentation type：Oral presentation (general)  

Venue：東京  

Presentation type：Oral presentation (general)  

Seasonal variability in the circulation pattern of Suo-Nada

Presentation type：Oral presentation (general)  

Venue：東京  

Presentation type：Oral presentation (general)  

Venue：北海道大学  

Presentation type：Oral presentation (general)  

A numerical study on the freshwater transport in the East China Sea

Presentation type：Oral presentation (general)  

Venue：北海道大学  

Presentation type：Oral presentation (general)  

Venue：北海道大学  

Presentation type：Oral presentation (general)  

Country：Korea, Republic of  

A numerical study on the behavior of the Changjiang Dilluted Water in the Yellow and East China Seas

Presentation type：Oral presentation (general)  

The effect of the wind forcing on the behavior of the Changjiang diluted water

Presentation type：Oral presentation (general)  

Venue：東京水産大学  

Presentation type：Oral presentation (general)  

Venue：長崎大学  

Presentation type：Oral presentation (general)  

Interannual variation of the Changjiang diluted water

Presentation type：Oral presentation (general)  

Venue：長崎大学  

Presentation type：Oral presentation (general)  

Venue：長崎大学  

Presentation type：Oral presentation (general)  

Venue：長崎大学  

Venue：長崎大学  

Presentation type：Oral presentation (general)  

Country：China  

A Numerical study on the Changjiang diluted water in the Yellow and East China Seas

Presentation type：Oral presentation (general)  

Country：China  

Observation and modeling of the subduction of the less saline shelf water associated with the Kuroshio frontal eddies in the East China Sea

Presentation type：Oral presentation (general)  

Venue：つくば市  

Presentation type：Oral presentation (general)  

A numerical modeling of behavior of drifters in the Yellow and East China Seas

Presentation type：Oral presentation (general)  

Country：Singapore  

Seasonality and eddy-induced variability in the circulation of Yellow and East China Seas

Presentation type：Oral presentation (general)  

Country：United States  

Driving mechanism of band structure of mean current over the continental shelf

Presentation type：Oral presentation (general)  

Country：United States  

A numerical study on the Changjiang Dililluted Water in the Yellow and East China Sea

Presentation type：Oral presentation (general)  

Venue：松山市  

Presentation type：Oral presentation (general)  

Venue：松山市  

Presentation type：Oral presentation (general)  

Venue：松山市  

Presentation type：Oral presentation (general)  

Venue：松山市  

Presentation type：Oral presentation (general)  

Venue：松山市  

Presentation type：Oral presentation (general)  

Venue：松山市  

Presentation type：Oral presentation (general)  

Modeling of the behavior of the Changjiang diluted water in the East Chinma Sea in summer 2003

Presentation type：Oral presentation (general)  

Venue：東京  

Presentation type：Oral presentation (general)  

A numerical study on the tidal front with sharpness varying in spring and neap tidal cycles

Presentation type：Oral presentation (general)  

Venue：仙台  

Presentation type：Oral presentation (general)  

Venue：仙台  

Presentation type：Oral presentation (general)  

Venue：仙台  

Presentation type：Oral presentation (general)  

Country：United States  

A Numerical Study on Kuroshio Frontal Eddies at the Shelf Edge of the East China Sea Using a Finite Volume Coastal Ocean Model

Presentation type：Oral presentation (general)  

Country：United States  

A Numerical Study on Kuroshio Frontal Eddies at the Shelf Edge of the East China Sea Using a Finite Volume Coastal Ocean Model

Presentation type：Oral presentation (general)  

Venue：横浜   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：横浜   Country：Japan  

Presentation type：Oral presentation (general)  

Country：China  

Presentation type：Oral presentation (general)  

Country：Japan  

Presentation type：Oral presentation (general)  

Country：Japan  

Presentation type：Oral presentation (general)  

Country：Japan  

Country：Japan  

Language：English  

Country：Japan  

Language：Japanese  

Country：Japan  

Language：Japanese  

Country：Japan  

Language：English  

Country：Japan  

Language：Japanese  

Country：Japan  

Language：Japanese  

Country：Japan  

Language：Japanese  

Country：Japan  

Language：Japanese  

Country：Japan  

Language：Japanese  

Country：Japan  

Language：Japanese  

Country：Japan  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：10

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：8

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Seminar, workshop

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency