Validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with Argo and mooring data
<p>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 <span class="inline-formula"><math xmlns="http://www.w3.org/199...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-06-01
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| Series: | Ocean Science |
| Online Access: | https://os.copernicus.org/articles/19/811/2023/os-19-811-2023.pdf |
| _version_ | 1797806131891929088 |
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| author | G. Geoffroy J. Nycander M. C. Buijsman J. F. Shriver B. K. Arbic |
| author_facet | G. Geoffroy J. Nycander M. C. Buijsman J. F. Shriver B. K. Arbic |
| author_sort | G. Geoffroy |
| collection | DOAJ |
| description | <p>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 <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">1</mn><mo>/</mo><mn mathvariant="normal">25</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="27pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="1c68ceb49b5d7fb53ab5f2f008d3f755"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="os-19-811-2023-ie00001.svg" width="27pt" height="14pt" src="os-19-811-2023-ie00001.png"/></svg:svg></span></span><span class="inline-formula"><sup>∘</sup></span> 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.</p> |
| first_indexed | 2024-03-13T06:02:36Z |
| format | Article |
| id | doaj.art-db9218a948c24e00a3e9347ca3890030 |
| institution | Directory Open Access Journal |
| issn | 1812-0784 1812-0792 |
| language | English |
| last_indexed | 2024-03-13T06:02:36Z |
| publishDate | 2023-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Ocean Science |
| spelling | doaj.art-db9218a948c24e00a3e9347ca38900302023-06-12T09:55:10ZengCopernicus PublicationsOcean Science1812-07841812-07922023-06-011981183510.5194/os-19-811-2023Validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with Argo and mooring dataG. Geoffroy0J. Nycander1M. C. Buijsman2J. F. Shriver3B. K. Arbic4Dept. of Meteorology, Stockholm University, Stockholm, SwedenDept. of Meteorology, Stockholm University, Stockholm, SwedenSchool of Ocean Science and Engineering, University of Southern Mississippi, Stennis Space Center, MS, USAOcean Dynamics and Prediction Branch, U.S. Naval Research Laboratory, Stennis Space Center, MS, USAEarth and Environmental Sciences, University of Michigan, Ann Arbor, MI, USA<p>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 <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">1</mn><mo>/</mo><mn mathvariant="normal">25</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="27pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="1c68ceb49b5d7fb53ab5f2f008d3f755"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="os-19-811-2023-ie00001.svg" width="27pt" height="14pt" src="os-19-811-2023-ie00001.png"/></svg:svg></span></span><span class="inline-formula"><sup>∘</sup></span> 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.</p>https://os.copernicus.org/articles/19/811/2023/os-19-811-2023.pdf |
| spellingShingle | G. Geoffroy J. Nycander M. C. Buijsman J. F. Shriver B. K. Arbic Validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with Argo and mooring data Ocean Science |
| title | Validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with Argo and mooring data |
| title_full | Validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with Argo and mooring data |
| title_fullStr | Validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with Argo and mooring data |
| title_full_unstemmed | Validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with Argo and mooring data |
| title_short | Validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with Argo and mooring data |
| title_sort | validating the spatial variability in the semidiurnal internal tide in a realistic global ocean simulation with argo and mooring data |
| url | https://os.copernicus.org/articles/19/811/2023/os-19-811-2023.pdf |
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