Global estimates of internal tide generation rates at 1/30º resolution
|Author(s)||Falahat Saeed1, Nycander Jonas1, de Lavergne Casimir2, 3, Roquet Fabien4, Madec Gurvan2, Vic Clément5|
|Affiliation(s)||1 : Department of Meteorology (MISU), Stockholm University, 114 18 Stockholm, Sweden
2 : LOCEAN Laboratory, Sorbonne Université-CNRS-IRD-MNHN, Paris F-75005, France
3 : School of Mathematics and Statistics, University of New South Wales, Sydney NSW 2052, Australia
4 : Department of Marine Sciences, University of Gothenburg, S-404 30 Gothenburg, Sweden
5 : University of Southampton, National Oceanography Centre, Southampton, United Kingdom
|Keyword(s)||tides, internal waves, ocean mixing|
The dataset contains global estimates of barotropic-to-baroclinic tidal energy conversion at 1/30-degree resolution. Three types of estimates are available:
1. Non-modal conversion rates calculated by Falahat et al. (2014) following the method of Nycander (2005). A map for each of the eight most energetic tidal constituents (M2, S2, K1, O1, N2, K2, P1, Q1) is provided.
2. Mode-by-mode conversion rates calculated by Falahat et al. (2014). A map for each of the three most energetic tidal constituents (M2, S2, K1) and each of vertical normal modes 1, 2, 3, 4, 5 and 6-10 is provided.
3. Mode-by-mode conversion rates calculated by Falahat et al. (2014), to which an ad hoc correction to eliminate negative conversion rates has been applied (following de Lavergne et al., 2019). The correction preserves basin-integrated, depth-dependent conversion rates. A map for each of the three most energetic tidal constituents (M2, S2, K1) and each of vertical normal modes 1, 2, 3, 4, 5 and 6-10 is provided.
All maps were computed using the WOCE global climatology of stratification, the ETOPO2v2 bathymetry product and the TXO6.2 atlas of barotropic tidal velocities. Detailed methods and documentation can be found in the following publications:
Nycander, J. Generation of internal waves in the deep ocean by tides. Journal of Geophysical Research 110, C10028 (2005). doi:10.1029/2004JC002487
Falahat, S., Nycander, J., Roquet, F., Moundheur, Z. Global calculation of tidal energy conversion into vertical normal modes. Journal of Physical Oceanography 44, 3225-3244 (2014). doi:10.1175/JPO-D-14-0002.1
de Lavergne, C., Falahat, S., Madec, G., Roquet, F., Nycander, J., Vic, C. Toward global maps of internal tide energy sinks. Ocean Modelling,137, 52-75 (2019). doi:10.1016/j.ocemod.2019.03.010.