ICTS:28712

Video URL

Effects of mesoscale eddies on the M2 internal tide in a 5km ICON-O simulation

Effects of mesoscale eddies on the M2 internal tide in a 5km ICON-O simulation

(2024). Effects of mesoscale eddies on the M2 internal tide in a 5km ICON-O simulation. SciVideos. https://youtu.be/5I7kZg2cPPg

Effects of mesoscale eddies on the M2 internal tide in a 5km ICON-O simulation. SciVideos, May. 21, 2024, https://youtu.be/5I7kZg2cPPg 

          @misc{ scivideos_ICTS:28712,
            doi = {},
            url = {https://youtu.be/5I7kZg2cPPg},
            author = {},
            keywords = {},
            language = {en},
            title = {Effects of mesoscale eddies on the M2 internal tide in a 5km ICON-O simulation},
            publisher = {},
            year = {2024},
            month = {may},
            note = {ICTS:28712 see, \url{https://scivideos.org/icts-tifr/28712}}
          }
Zoi Kourkouraidou
Talk numberICTS:28712
Source RepositoryICTS-TIFR
Source EventTheoretical and Practical Perspectives in Geophysical Fluid Dynamics
Collection

Abstract

We use the ocean-only global circulation model (gcm) ICON-O with very high horizontal (5km), vertical and temporal resolution including the astronomical tidal forcing to study the effects of mesoscale eddies on the low-mode internal tide. This is the first study using a high-resolution gcm to study these interactions.
The diagnosed lunar semidiurnal (M2) internal tide reveals wavy patterns with horizontally varying wavelengths, which do not correspond to plain waves.
We therefore propose a new modal decomposition method based on spatial empirical orthogonal functions. Using this method we observe enhanced dissipation of the internal tide kinetic energy inside and in the lee area of the eddy, which can be attributed to enhanced weakening of the low mode internal tide. We also observe that eddies can significantly alter the propagation pathways of the low-mode internal tide by refracting the beam southwards.
We also find that the high-modes of the internal tide are trapped inside and ...