Dynamic Atmospheric Correction using ERA5

DAC-ERA5 amplitude (m) for the date January 10th 2022

Types of dataset: auxiliary products

Contents: Available on the period 01/02/1992 – 31/12/2022, hourly files; grid is a regular grid (0.125°x0.125°)

DOI: 10.24400/527896/a01-2025.006 -  more metadata

Use: coastal oceanography, operational oceanography, ocean circulation, tide studies.

Description: DAC-ERA5 is based on a TUGO simulation forced by ERA5 meteorological reanalysis. DAC-ERA5 product is a combination between TUGO HR barotropic model output (high frequencies) and the Inverted Barometer correction (IB, low frequencies). The cutoff period used to separate high and low frequencies is 20 days.

Citation: Please cite: "This product "DAC-ERA5" was produced by CNES/CNRS-LEGOS/CLS as part of the FESDAC project, and is distributed by AVISO+ with the support of CNES, (2025). Dynamic Atmospheric Correction using ERA5 meteorological reanalysis (Version 1.1) [Data set]. CNES. https://doi.org/10.24400/527896/A01-2025.006 "

Geographic coverage: global

Format: NetCDF

Condition of access: products delivered for any purposes as stated in the licence agreement. 

References: 

  • User Manual
  • Kocha C. , M. Lievin, Y. Pageot, C. Rubin, V. Quet, F. Octau, M.I. Pujol, P. Prandi, S. Philipps, G. Dibarboure, I. Denis, C. Nogueira Loddo, T. Guinle, F. Bignalet-Cazalet : “Three decades of sea level multi-mission satellite data reprocessed to improve mesoscale quality while ensuring climate scale consistency”, in preparation.
  • Loren Carrere, Marine Lievin , Quentin Dagneaux, Cécile Kocha , Florent Lyard, Damien Allain, Yannice Faugère , Gérald Dibarboure , Nicolas Picot : “Using ERA5 meteorological reanalysis to improve the Dynamic Atmospheric Correction for altimetry”, presentation at OSTST meeting 2020 : https://ostst.aviso.altimetry.fr/fileadmin/user_upload/tx_ausyclsseminar/files/DAC_ERA5_carrere_et_al.pdf 

DAC using ERA5

ProductAuthenticated access serviceFrequencyData periodFile weight
DAC using ERA5

CNES AVISO FTP/SFTP access (with AVISO+ credentials):
 

  • ftp://ftp-access.aviso.altimetry.fr:21
  • sftp://ftp-access.aviso.altimetry.fr:2221
    • /auxiliary/dac/dac_forced_by_era5_meteo_model

CNES AVISO THREDDS Data Server access:
https://tds%40odatis-ocean.fr:odatis@tds-odatis.aviso.altimetry.fr/thredds/catalog/dataset-auxiliary-dynamic-atmospheric-correction-forced-by-era5-meteo-model/catalog.html

hour01/02/1992 – 31/12/20228 MB per file (one file every hour)