Validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with Argo and mooring data
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Published:2023-06-12
Issue:3
Volume:19
Page:811-835
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ISSN:1812-0792
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Container-title:Ocean Science
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language:en
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Short-container-title:Ocean Sci.
Author:
Geoffroy GaspardORCID, Nycander JonasORCID, Buijsman Maarten C.ORCID, Shriver Jay F.ORCID, Arbic Brian K.ORCID
Abstract
Abstract. The autocovariance of the semidiurnal internal tide (IT) is examined in a 32 d segment of a global run of the HYbrid Coordinate Ocean Model (HYCOM). This numerical simulation, with 41 vertical layers and 1/25∘ horizontal resolution, includes tidal and atmospheric forcing, allowing for the generation and propagation of ITs to take place within a realistic eddying general circulation. The HYCOM data are in turn compared with global observations of the IT around 1000 dbar, from Argo float park-phase data and mooring records. HYCOM is found to be globally biased low in terms of the IT variance and decay of the IT autocovariance over timescales shorter than 32 d. Except in the Southern Ocean, where limitations in the model cause the discrepancy with in situ measurements to grow poleward, the spatial correlation between the Argo and HYCOM tidal variance suggests that the generation of low-mode semidiurnal ITs is globally well captured by the model.
Funder
Vetenskapsrådet Office of Naval Research
Publisher
Copernicus GmbH
Subject
Cell Biology,Developmental Biology,Embryology,Anatomy
Reference50 articles.
1. Alford, M. H. and Zhao, Z.: Global patterns of low-mode internal-wave
propagation. Part I: Energy and energy flux, J. Phys.
Oceanogr., 37, 1829–1848, https://doi.org/10.1175/JPO3085.1, 2007. a 2. Ansong, J. K., Arbic, B. K., Alford, M. H., Buijsman, M. C., Shriver, J. F.,
Zhao, Z., Richman, J. G., Simmons, H. L., Timko, P. G., Wallcraft, A. J., and
Zamudio, L.: Semidiurnal internal tide energy fluxes and their variability in
a global ocean model and moored observations, J. Geophys.
Res.-Oceans, 122, 1882–1900,
https://doi.org/10.1002/2016JC012184, 2017. a, b 3. Arbic, B. K.: Incorporating tides and internal gravity waves within global
ocean general circulation models: A review, Prog. Oceanogr., 206,
102824, https://doi.org/10.1016/j.pocean.2022.102824, 2022. a 4. Arbic, B. K., Wallcraft, A. J., and Metzger, E. J.: Concurrent simulation of
the eddying general circulation and tides in a global ocean model, Ocean
Model., 32, 175–187, https://doi.org/10.1016/j.ocemod.2010.01.007, 2010. a 5. Arbic, B. K., Elipot, S., Brasch, J. M., Menemenlis, D., Ponte, A. L., Shriver,
J. F., Yu, X., Zaron, E. D., Alford, M. H., Buijsman, M. C., Abernathey, R.,
Garcia, D., Guan, L., Martin, P. E., and Nelson, A. D.: Frequency dependence
of near-surface oceanic kinetic energy from drifter observations and global
high-resolution models, arXiv [preprint], https://doi.org/10.48550/ARXIV.2202.08877, 22 July 2022. a
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