2019 Fiscal Year Annual Research Report
Development of an integrated multi-scale coastal environmental similation system and its applications to regional- to large-scale oceanic states under variable global signals(Fostering Joint International Research)
| Project/Area Number |
15KK0207
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| Research Institution | Kobe University |
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Principal Investigator |
内山 雄介 神戸大学, 工学研究科, 教授 (80344315)
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| Project Period (FY) |
2016 – 2019
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| Keywords | 領域海洋循環モデル / 波－流れ相互作用 / サブメソスケール乱流 / 物質分散 / ネスティング |
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| Outline of Annual Research Achievements |
本研究では，変動環境下に適用可能な，砕波帯・陸棚・外洋をシームレスに接続する海洋モデリング技術開発を行う．これらの技術に基づく統合型沿岸環境予測システムでは，地球規模環境シグナルを厳密に考慮しつつ，人間活動や海洋生態系にとって重要な役割を果たす沿岸域における精緻な解析，海流，波浪，河川，潮汐，風応力等の浅海物理学に求められる全ての要素を包含した流動環境，それに伴う栄養塩等の溶存物質，土砂や生物幼稚子等の懸濁質分散・循環の統一的な動態解析などが可能となる．さらに，海洋学において最先端の話題となっている海洋表層混合やそれに伴う気候変動モデルに対する波浪の影響について，サブメソスケール現象を取り上げ，それらの定量的性質や発生機構に踏み込んだ数値解析を行うことを目指している．
2017年9月までの長期渡航のあとも継続して国際共同研究を推進し，2018年度は開発中のマルチスケールモデルの完成に向けた要素技術開発を行い，波浪影響下の状況を含む複数の高解像度海洋再解析に取り組んだ．まず，和歌山田辺湾において台風期を含む夏季から秋季にADCP等の長期係留観測を行い，強風・高波浪下における海面での運動量および乱流エネルギー輸送などについて検討した．また，南カリフォルニア湾を対象に波－流れ相互作用を考慮したスペクトル波浪モデルによる長期再解析を行い，海流による波浪変調機構についての解析を行った．さらに，湧昇フロントに発生するSCSsに対する波浪の影響に関する解析，砕波帯に発生する3次元渦の発生発達過程に関する解析，サブメソスケール乱流拡散が福島第一原発を放出源とする放射性核種の海洋分散に及ぼす影響の解析，黒潮およびそれに伴う海洋渦がサンゴ礁生態系ネットワークの形成に及ぼす影響の解析，内湾域における下水道処理水の海洋分散と隣接するノリ養殖上への影響評価などを行った．
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[Journal Article] Multiscale routes to supply nutrients through the Kuroshio nutrient stream2019
Author(s)
Nagai, T., Clayton, S. and Uchiyama, Y.
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Journal Title
In: Kuroshio Current: Physical, Biogeochemical and Ecosystem Dynamics, Geophysical Monograph Series, Eds: Nagai, T., Saito, H., Suzuki, K. and Takahashi, M., John Wiley & Sons, NY, ISBN:1119428343
Volume: -
Pages: 105-126
Peer Reviewed / Int'l Joint Research
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[Presentation] Biogeochemical responses to seasonal oceanic variability around a ridge area along the Kuroshio off Japan2020
Author(s)
Zhang, X., Uchiyama, Y., Suzue, Y. and Yamazaki, H.
Organizer
Ocean Sciences Meeting 2020, Feb. 16-21, 2020, San Diego, CA, USA.
Int'l Joint Research
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[Presentation] Effects of Wave Streaming and Wave Variations on Nearshore Wave-driven Circulation2020
Author(s)
Wang, P., McWilliams, J.C., Uchiyama, Y. and Chekroun, M.
Organizer
Ocean Sciences Meeting 2020, Feb. 16-21, 2020, San Diego, CA, USA.
Int'l Joint Research
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[Presentation] A preliminary analysis of a newly-developed regional ocean data assimilation system: A case of Tokyo Bay in summer2019
Author(s)
Takatama, K., Kurosawa, K., Uchiyama, Y. and Miyoshi, T.
Organizer
7th International Symposium on Data Assimilation (ISDA2019), Jan. 21-24, 2019, Riken RCCS, Kobe, Japan.
Int'l Joint Research
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[Presentation] Multiple-scale variations of wind-generated wave in the Southern California Bight2019
Author(s)
Cao, Y., Dong, C., Uchiyama, Y., Wang, J. and Yin, X.
Organizer
20th Pacific Asian Marginal Seas (PAMS 2019), Mar. 19-22, 2019, Kaohsiung, Taiwan.
Int'l Joint Research
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[Presentation] A medium-term reanalysis of synoptic circulations in the South China Sea using a HYCOM-ROMS downscaling ocean model2019
Author(s)
Takaura, N., Uchiyama, Y., Nizamani, Z. and Nakayama, A.
Organizer
20th Pacific Asian Marginal Seas (PAMS 2019), Mar. 19-22, 2019, Kaohsiung, Taiwan.
Int'l Joint Research
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[Presentation] Interisland coral connectivity across the Nansei Archipelago, the East China Sea: Dynamical influences of the Kuroshio2019
Author(s)
Uchiyama, Y., Odani, S., Kashima, M., Kamidaira, Y. and Mitarai, S.
Organizer
20th Pacific Asian Marginal Seas (PAMS 2019), Mar. 19-22, 2019, Kaohsiung, Taiwan.
Int'l Joint Research
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[Presentation] Implementing regional downscaling capability in the STREAMER ocean prediction system based on multi-nested ROMS model（多段ネストROMSモデルに基づいたSTEAMERにおけるダウンスケーリング機能の実装）2019
Author(s)
Kamidaira, Y., Kawamura, H., Kobayashi, T., and Uchiyama, Y.
Organizer
Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, May 26-30, 2019.
Int'l Joint Research
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[Presentation] Transport processes around the Izu-chain islands investigated with a Lagrangian particle tracking model（Lagrange粒子追跡モデルを用いた伊豆諸島周辺海域の物質輸送・拡散の評価）2019
Author(s)
Kimura, W., Masunaga, E., Kosako, T. and Uchiyama, Y.
Organizer
Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, May 26-30, 2019.
Int'l Joint Research
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[Presentation] A reanalysis of regional circulations in the Southern South China Sea using a HYCOM-ROMS downscaling ocean model（HYCOM-ROMSモデルを用いた南シナ海南部における海洋流動構造に関する研究）2019
Author(s)
Takaura, N., Uchiyama, Y., Nizamani, Z. and Nakayama, A.
Organizer
Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, May 26-30, 2019.
Int'l Joint Research
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[Presentation] Neasrshore transport of suspended radiocesium In the Fuksima Coast derived from Niida River induced by Typhoon Wipha（新田川河口海域における台風Wilpaによる出水イベントに伴う懸濁態放射性セシウムの沿岸輸送について）2019
Author(s)
Tokunaga, N., Uchiyama, Y., Tsumune, D., Yamada, M., Tateda, Y., Ito, Y., Ishimaru, T., Watanabe, Y., Ikehara, K. and Fukuda, M.
Organizer
Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, May 26-30, 2019.
Int'l Joint Research
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[Presentation] Biogeochemical responses to seasonal oceanic variability along the Kuroshio2019
Author(s)
Zhang, X., Uchiyama, Y., Suzue, Y. and Yamazaki, H.
Organizer
Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, May 26-30, 2019.
Int'l Joint Research
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[Presentation] A flood-induced sediment and suspended radiocesium transports in the Fukushima Coast due to Typhoon 201326 analyzed with a JCOPE2-ROMS downscaling model and in situ observations2019
Author(s)
Tokunaga, N., Uchiyama, Y., Tsumune, D., Yamada, M., Tateda, Y., Ito, Y., Ishimaru, T., Watanabe, Y., Ikehara, K. and Fukuda, M.
Organizer
AOGS 16th Annual Meeting (AOGS 2019), Singapore, Jul. 28 - Aug. 2, 2019.
Int'l Joint Research
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[Presentation] How the Kuroshio enriches the southern coast of Japan and its downstream regions?2019
Author(s)
Nagai, T., Duran, S., Otero, D., Yoshie, N., Ohgi, K., Hasegawa, D., Clayton, S. and Uchiyama, Y.
Organizer
PICES-2019 Connecting Science and Communities in a Changing North Pacific, Victoria, BC, Canada, Oct. 16-27, 2019.
Int'l Joint Research
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[Presentation] Identification of coral spawn supply source for restoration of the Sekisei Lagoon within the Kuroshio region2019
Author(s)
Kashima, M., Takeda, N., Odani, S., Uchiyama, Y., Kamidaira, Y. and Mitarai, S.
Organizer
AGU Fall Meeting 2019, San Francisco, CA, USA, Dec. 9-13, 2019.
Int'l Joint Research
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[Book] Nagai, T., Clayton, S. and Uchiyama, Y. (2019): Multiscale routes to supply nutrients through the Kuroshio nutrient stream, In: Kuroshio Current: Physical, Biogeochemical and Ecosystem Dynamics, Geophysical Monograph Series2019
Author(s)
Eds: Nagai, T., Saito, H., Suzuki, K. and Takahashi, M.
Total Pages
336
Publisher
John Wiley & Sons
ISBN
1119428343
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