Accurate ocean tide modeling in southeast Alaska and large tidal dissipation around Glacier Bay |
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| Authors: | Daisuke Inazu Tadahiro Sato Satoshi Miura Yusaku Ohta Kazuyuki Nakamura Hiromi Fujimoto Christopher F Larsen Tomoyuki Higuchi |
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| Institution: | (1) The Institute of Statistical Mathematics/Japan Science and Technology Agency, Minami-Azabu, Minato-ku, Tokyo 106-8569, Japan;(2) Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan;(3) Geophysical Institute, University of Alaska Fairbanks, Koyukuk Dr, Fairbanks, AK, 99775, U.S.A. |
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| Abstract: | An accurate prediction of ocean tides in southeast Alaska is developed using a regional, barotropic ocean model with a finite
difference scheme. The model skill is verified by the observational tidal harmonics in southeast Alaska including Glacier
Bay. The result is particularly improved in Glacier Bay compared to the previous model described by Foreman et al. (2000). The model bathymetry dominates the model skill. We re-estimate tidal energy dissipation in the Alaska Panhandle
and suggest a value for tidal energy dissipation of 3.4 GW associated with the M2 constituent which is 1.5 times the estimation of Foreman et al. (2000). A large portion of the M2 energy budget entering through Chatham Strait is dissipated in the vicinity of Glacier Bay. Moreover, it is shown that the
developed model has the potential to correct the ocean tide loading effect in geodetic data more efficiently than the model
of Foreman et al. (2000), especially around Glacier Bay. |
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| Keywords: | Bathymetry bottom friction Glacier Bay tidal energy dissipation |
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