[{"name":"geoffroy-2024-slopit-1","title":"Global map of the M2-tidal conversion into modes 1\u2060\u200a\u2013\u200a\u20605 by continental margins","summary":"This dataset is a global map of the barotropic-to-baroclinic tidal conversion rate at continental slopes and shelves for the first five modes of the M2 constituent (the largest lunar constituent of the tides). The method used to compute the conversion rate (or baroclinic energy flux) resolves the onshore and offshore fluxes. The horizontal direction of the computed fluxes is estimated from the normal to the slope.\r\n\r\nSuch modally decomposed, anisotropic energy flux estimate is valuable to predict the propagation and, ultimately, the dissipation of internal tides generated at continental margins. The diapycnal mixing that results from the breaking of these internal waves is known to have wide implications on the ocean state, and therefore on our climate system.\r\n\r\nThe data takes the form of a collection of polygons (representing small slices of the global continental slopes) each associated with an energy flux. The energy flux was calculated using a semi-analytical method that relies on global observations of the bathymetry, barotropic tidal transports, and stratification.","citations":"Egbert GD, Erofeeva SY (2002) Efficient inverse modeling of barotropic ocean tides. Journal of Atmospheric and Oceanic Technology 19:183\u2013204. https:\/\/doi.org\/10.1175\/1520-0426(2002)019%3C0183:EIMOBO%3E2.0.CO;2\r\n\r\nGouretski V, Koltermann KP (2004) WOCE global hydrographic climatology. Berichtedes BSH, 35, 1\u201352.\r\n\r\nNASA Ocean Biology Processing Group (OBPG), Stumpf RP (2012) Distance to Nearest Coastline: 0.01-Degree Grid. Distributed by the Pacific Islands Ocean Observing System (PacIOOS).\r\n\r\nKelly SM, Jones NL, Nash JD (2013) A coupled model for Laplace\u2019s tidal equations in a fluid with one horizontal dimension and variable depth. Journal of Physical Oceanography 43:1780\u20131797. https:\/\/doi.org\/10.1175\/jpo-d-12-0147.1\r\n\r\nHarris PT, Macmillan-Lawler M, Rupp J, Baker EK (2014) Geomorphology of the oceans. Marine Geology 352:4\u201324. https:\/\/doi.org\/10.1016\/j.margeo.2014.01.011\r\n\r\nGEBCO Bathymetric Compilation Group 2023 (2023) The GEBCO_2023 Grid - a continuous terrain model of the global oceans and land. https:\/\/doi.org\/10.5285\/f98b053b-0cbc-6c23-e053-6c86abc0af7b\r\n\r\nGeoffroy G, Kelly SM, Nycander J (2024) Tidal conversion into vertical normal modes by continental margins. Geophysical Research Letters. [Manuscript under review].\r\n\r\nGeoffroy G (2024) Scripts for mapping the tidal conversion by continental margins. Software version 1.0.0. Bolin Centre Code Repository. https:\/\/doi.org\/10.57669\/geoffroy-2024-slopit-1.0.0","comments":"This dataset was produced by using the [Scripts for mapping the tidal conversion by continental margins](https:\/\/git.bolin.su.se\/gaspard_geoffroy\/geoffroy-2024-slopit) by Geoffroy (2024). The computations are based on the semi-analytical method described in Geoffroy et al. (2024). Please cite the latter article when using this dataset and contact the corresponding author Gaspard Geoffroy for any scientific or data-related questions.\r\n\r\nThe semi-analytical method uses different observational data as inputs, including:\r\n- the barotropic tidal elevations and transports from the inverse model TPXO-atlas-v5 ([Egbert & Eerofeva 2002](https:\/\/doi.org\/10.1175\/1520-0426(2002)019%3C0183:EIMOBO%3E2.0.CO;2))\r\n- the WOCE\/Argo climatology of [Gouretski & Koltermann (2004)](https:\/\/odv.awi.de\/fileadmin\/user_upload\/odv\/data\/Gouretski-Koltermann-2004\/BSH35_report_final.pdf)\r\n- the bathymetry from [GEBCO Bathymetric Compilation Group 2023 (2023)](https:\/\/doi.org\/10.5285\/f98b053b-0cbc-6c23-e053-6c86abc0af7b)\r\n- the [distance to the nearest coastline dataset](https:\/\/oceancolor.gsfc.nasa.gov\/resources\/docs\/distfromcoast\/) of [NASA Ocean Biology Processing Group (OBPG) & Stumpf (2012)](http:\/\/pacioos.org\/metadata\/dist2coast_1deg.html)\r\n- the geomorphic data of [Harris et al. (2014)](https:\/\/doi.org\/10.1016\/j.margeo.2014.01.011).\r\n\r\nThe computations of the tidal conversion are done using the CELT model ([Kelly et al. 2013](https:\/\/doi.org\/10.1175\/jpo-d-12-0147.1)).","category":"Marine","subcategory":"Tides","keywords":"Internal waves; Internal tides; Continental slope; Continental shelf","scientist":"Gaspard Geoffroy","firstname":"Gaspard","lastname":"Geoffroy","address":"Department of Meteorology; Stockholm University","postalcode":"SE-106 91 ","city":"Stockholm","province":"","country":"Sweden ","parameters":"Earth science > Oceans > Tides","location":"Ocean","progress":"","language":"English","project":"This work was supported by Grant 2017-04623 from the Swedish Research Council. ","publisher":"Bolin Centre Database","version":"1","constrains":"","access":""}]