News

Aviso is pleased to announce the new tide model FES2014 (elevations, load and currents) available on a regular grid of 1/16°. FES is a finite elements hydrodynamic model which assimilates in-situ data and altimeter data (Topex/ Poseidon, Jason-1, Jason-2, T/P interleaved - J1 interleaved, ERS-1, ERS-2, and Envisat). 

This new version FES2014 can be downloaded from the Aviso+ :

• If you are not yet registered, please fill in the <link internal-link>registration form to get access this product. Ask for FES2014 Oceanic Tides Heights or/and FES2014 Oceanic Tides Currents (Oceanic Tide Currents are delivered for scientific purposes only as stated in the <media 14286 - - "TEXT, License Aviso, License_Aviso.pdf, 339 KB">licence agreement</media>).
• If you are already subscribed to the previous tide model FES2012 for heights: you have automatically access to the new tide model FES2014 for elevations and load constituents with your same login/password on the FTP server.
• If you are already subscribed to the previous tide model FES2012 for currents: you have automatically access to the new tide model FES2014 for currents with your same login/password on the FTP server
• Unlike the FES2012 delivery where the software is delivered on the FTP server, FES2014 tidal prediction software is available on <link https: bitbucket.org cnes_aviso fes>bitbucket.org/cnes_aviso/fes

Main improvements between FES2014 and FES2012 are:

• refinement of the finite element mesh (~2.9 million nodes = 50% more than FES2012)
• new global bathymetry including most recent global and regional datasets and specific filtering in some regions
• improved coastlines in coastal regions
• optimized assimilation scheme
• improved physic, particularly for the Hudson Bay region simulation
• assimilation of long time series of altimetric data with improved altimeter standards (Topex/Poseidon, Jason-1, Jason-2, TPN-J1N,  ERS-1, ERS-2 end Envisat): crossovers and along-track data
• assimilation of tidal gauges 
• several  non linear hydrodynamic waves are included: M4, M6, M8, MN4, MS4, MKS2, N4, S4, MSf (great benefits for coastal areas)
• S2 tide benefits from a specific atmospheric forcing computed from ECMWF 3h-DCDA-analysis
• six long period hydrodynamic waves are used: Mf, Mm, Mtm, Msqm, Ssa, Sa (and removed from the Cartwright long period equilibrium tide algorithm)
• elevations, currents and tidal loading effects are available. Notice that two elevation datasets are provided: the extrapolated dataset corresponds to the FES2014b elevations grid which have been extrapolated on shores and this extrapolated tide solution is used in the altimeter GDRs.
• the gridded resolution of the distributed package is 1/16°

<media 16261 1770x600 - "IMAGE, fes2014 huv Channel 20160918 h19 big, fes2014_huv_Channel_20160918_h19_big.png, 432 KB"></media>

FES2014 tidal elevations in meters (left) and tidal currents in m/s (right) on 2016/09/18, 19:00. See the animation over 3 days (72 frames) on the <link internal-link>product sheet. Credits Legos/Noveltis/Cnes/CLS, produced by Aviso.

Further information:

• Data, Auxiliary products: FES2014
  • <link internal-link>Product sheet
  • <link internal-link>Description, validation, references
• Applications, Oceans: <link internal-link>Tides
• Image of the month: 
  • March 2016: <link internal-link>Storm in the Bay of Biscay
  • March 2015: <link internal-link>High tides at Mont Saint-Michel