caa a22 4500 605455252 CHVBK 20210128100211.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10872-014-0256-2 doi (NATIONALLICENCE)springer-10.1007/s10872-014-0256-2 Observations of current and mixing around the shelf break in Pribilof Canyon in the Bering Sea [Elektronische Daten] [T. Tanaka, I. Yasuda, H. Onishi, H. Ueno, M. Masujima] 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. The Oceanographic Society of Japan and Springer Japan, 2014 Vertical turbulent mixing nationallicence Microstructure observation nationallicence Tidal current nationallicence Pribilof Canyon nationallicence Tanaka T. Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, 277-8564, Kashiwa, Chiba, Japan aut Yasuda I. Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, 277-8564, Kashiwa, Chiba, Japan aut Onishi H. Faculty of Fisheries Science, Hokkaido University, 3-1-1 Minato-cho, 041-8611, Hakodate, Hokkaido, Japan aut Ueno H. Faculty of Fisheries Science, Hokkaido University, 3-1-1 Minato-cho, 041-8611, Hakodate, Hokkaido, Japan aut Masujima M. National Research Institute of Fisheries Science, Fisheries Research Agency, 2-12-4 Fukuura, Kanazawa, 236-8648, Yokohama, Kanagawa, Japan aut Journal of Oceanography Springer Japan 71/1(2015-02-01), 1-17 0916-8370 71:1<1 2015 71 10872 https://doi.org/10.1007/s10872-014-0256-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10872-014-0256-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tanaka T. Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, 277-8564, Kashiwa, Chiba, Japan aut NATIONALLICENCE 700 1- Yasuda I. Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, 277-8564, Kashiwa, Chiba, Japan aut NATIONALLICENCE 700 1- Onishi H. Faculty of Fisheries Science, Hokkaido University, 3-1-1 Minato-cho, 041-8611, Hakodate, Hokkaido, Japan aut NATIONALLICENCE 700 1- Ueno H. Faculty of Fisheries Science, Hokkaido University, 3-1-1 Minato-cho, 041-8611, Hakodate, Hokkaido, Japan aut NATIONALLICENCE 700 1- Masujima M. National Research Institute of Fisheries Science, Fisheries Research Agency, 2-12-4 Fukuura, Kanazawa, 236-8648, Yokohama, Kanagawa, Japan aut NATIONALLICENCE 773 0- Journal of Oceanography Springer Japan 71/1(2015-02-01), 1-17 0916-8370 71:1<1 2015 71 10872