Observations of current and mixing around the shelf break in Pribilof Canyon in the Bering Sea

Verfasser / Beitragende:
[T. Tanaka, I. Yasuda, H. Onishi, H. Ueno, M. Masujima]
Ort, Verlag, Jahr:
2015
Enthalten in:
Journal of Oceanography, 71/1(2015-02-01), 1-17
Format:
Artikel (online)
ID: 605455252
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024 7 0 |a 10.1007/s10872-014-0256-2  |2 doi 
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245 0 0 |a Observations of current and mixing around the shelf break in Pribilof Canyon in the Bering Sea  |h [Elektronische Daten]  |c [T. Tanaka, I. Yasuda, H. Onishi, H. Ueno, M. Masujima] 
520 3 |a Tide-induced vertical mixing along the shelf break in the eastern Bering Sea is considered one of the main physical processes that sustain local summertime high biological production. However, observations based on microstructure measurements that show enhanced tidal mixing are scarce. In this study, repeated casts of current and turbulence in the vicinity of the shelf break within Pribilof Canyon were conducted over a day in June 2012, enabling us to evaluate the representativeness of the vertical mixing intensity during oneday and to detect the relationship between turbulence and tidal current. The cross-sectional distributions of the one-day averaged vertical diffusivity and the turbulent energy dissipation rate showed that strong vertical mixing occurred at the subsurface within about 15km of the shelf break and near the seabed of the outer shelf. This result agrees with prior observations that were made by us and based on a single profile at each station, which indicated that the observed spatial pattern of turbulence is robust. Diurnal and semidiurnal tidal currents dominated the flow variations off the shelf break, and a statistically significant positive correlation was detected between the vertical shear of the horizontal tidal currents and the turbulent energy dissipation rate. This result suggests that the high turbulent energy dissipation and the enhanced vertical mixing off the shelf break were induced by the strong vertical shear of tidal currents. 
540 |a The Oceanographic Society of Japan and Springer Japan, 2014 
690 7 |a Vertical turbulent mixing  |2 nationallicence 
690 7 |a Microstructure observation  |2 nationallicence 
690 7 |a Tidal current  |2 nationallicence 
690 7 |a Pribilof Canyon  |2 nationallicence 
700 1 |a Tanaka  |D T.  |u Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, 277-8564, Kashiwa, Chiba, Japan  |4 aut 
700 1 |a Yasuda  |D I.  |u Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, 277-8564, Kashiwa, Chiba, Japan  |4 aut 
700 1 |a Onishi  |D H.  |u Faculty of Fisheries Science, Hokkaido University, 3-1-1 Minato-cho, 041-8611, Hakodate, Hokkaido, Japan  |4 aut 
700 1 |a Ueno  |D H.  |u Faculty of Fisheries Science, Hokkaido University, 3-1-1 Minato-cho, 041-8611, Hakodate, Hokkaido, Japan  |4 aut 
700 1 |a Masujima  |D M.  |u National Research Institute of Fisheries Science, Fisheries Research Agency, 2-12-4 Fukuura, Kanazawa, 236-8648, Yokohama, Kanagawa, Japan  |4 aut 
773 0 |t Journal of Oceanography  |d Springer Japan  |g 71/1(2015-02-01), 1-17  |x 0916-8370  |q 71:1<1  |1 2015  |2 71  |o 10872 
856 4 0 |u https://doi.org/10.1007/s10872-014-0256-2  |q text/html  |z Onlinezugriff via DOI 
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900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s10872-014-0256-2  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Tanaka  |D T.  |u Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, 277-8564, Kashiwa, Chiba, Japan  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Yasuda  |D I.  |u Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, 277-8564, Kashiwa, Chiba, Japan  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Onishi  |D H.  |u Faculty of Fisheries Science, Hokkaido University, 3-1-1 Minato-cho, 041-8611, Hakodate, Hokkaido, Japan  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Ueno  |D H.  |u Faculty of Fisheries Science, Hokkaido University, 3-1-1 Minato-cho, 041-8611, Hakodate, Hokkaido, Japan  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Masujima  |D M.  |u National Research Institute of Fisheries Science, Fisheries Research Agency, 2-12-4 Fukuura, Kanazawa, 236-8648, Yokohama, Kanagawa, Japan  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Journal of Oceanography  |d Springer Japan  |g 71/1(2015-02-01), 1-17  |x 0916-8370  |q 71:1<1  |1 2015  |2 71  |o 10872