SEASONAL VARIABILITY OF WATER EXCHANGE AT THE ENTRNCE OF A SEMI-ENCLOSE BAY AND ITS UNDERLYING MECHANISMS
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- OKADA Nobue
- 神戸大学大学院 工学研究科市民工学専攻
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- UCHIYAMA Yusuke
- 神戸大学 大学院工学研究科市民工学専攻
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- TADA Hiroaki
- 日本工営株式会社 名古屋支店技術部
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- ENDO So
- 伊藤忠商事株式会社 住生活カンパニー生活資材第三部
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- BABA Yasuyuki
- 京都大学 防災研究所
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- MIZUTAMI Hideaki
- 株式会社ハイドロ総合技術研究所
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- KUBO Teruhiro
- 京都大学 防災研究所
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- MORI Nobuhito
- 京都大学 防災研究所
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- WATANABE Yasunori
- 北海道大学 大学院工学研究院
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- OTSUKA Junichi
- (国研)寒地土木研究所 寒地水圏研究グループ
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- YAMADA Tomohito
- 北海道大学 大学院工学研究院
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- SARUWATARI Ayumi
- 北海道大学 大学院工学研究院
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- NINOMIYA Junichi
- 金沢大学 理工研究域 環境デザイン学系
Bibliographic Information
- Other Title
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- 半閉鎖性内湾における海水交換特性の季節変化とその形成メカニズムについて
- ハンヘイサセイ ナイワン ニ オケル カイスイ コウカン トクセイ ノ キセツ ヘンカ ト ソノ ケイセイ メカニズム ニ ツイテ
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Abstract
An extensive field campaign was carried out to examine water exchange at the entrance of the semi-enclosed Tanabe Bay, Wakayama, from September until December 2016 using the observing system of the Tanabe-Nakashima observatory and an ADCP. The first half of the observation period mostly under stratified condition is characterized by a gross outflow from the bay, while the second half under unstratified condition is dominated by inflow into the bay. Typhoon 201616 attacked the bay during the first half, which excited intensive instantaneous outflow. Although the semi-diurnal component prevails in the upper ocean velocity during both periods, the coherent analysis indicates that the external forcing such as wind and sea surface height is less correlated at this frequency. This suggests that baroclinic velocity profiles at depth would yield inversion of flow direction that cancels the vertically-integrated volume flux, which is viewed as a proxy of the water exchange. During the second half, the subtidal low-frequency component is responsible for the exchange, which may be caused by meridional shift of the Kuroshio path and associated mesoscale circulations formed in the Kii Channal that leads to multiple warming events.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 74 (2), I_667-I_672, 2018
Japan Society of Civil Engineers
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Details
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- CRID
- 1390001288087587328
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- NII Article ID
- 130007504135
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- NII Book ID
- AA12508551
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- ISSN
- 18838944
- 18842399
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- HANDLE
- 20.500.14094/90006804
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- NDL BIB ID
- 029325592
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed