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MSLA - Monthly mean and Climatology Maps of Sea Level Anomalies

Types of dataset: Ssalto/Duacs multimission altimeter products. From January 1993 to the last extension of the Delayed-time products, the long delayed-time dataset allows to compute statistical means of MSLA over different periods of time. Averaged MSLA and Climatological MSLA are created from daily Ssalto/Duacs - DT MSLA - Merged Product - best sampling available in time (i.e. "all-sat-merged" serie, see DT-MSLA product sheet for further information).

Three kinds of means are proposed:

  • Monthly averaged MSLA corresponds to the weekly maps of delayed-time sea level anomalies averaging month by month from January 1993. We obtain one file and one map per month since January 1993.
  • Seasonal mean of MSLA corresponds to the daily maps of delayed-time sea level anomalies averaging season by season. We obtain one file and one map per season (JFM - AMJ - JAS- OND).
  • Climatological monthly MSLA are calculated by averaging the daily maps of delayed-time sea level anomalies over a same month from January 1993 up to the last extension of the Delayed-time products. We obtain one data file and one map for each month.

Contents: multimission gridded sea surface heights computed with respect to a twenty-year mean profile [1993-2012], and including the seasonal variability (no annual cycle is removed).
Use: long-term variability, seasonal and climate studies.
Condition of access: products delivered for scientific purposes only as stated in the licence agreement. Further information :  Access to Ssalto/Duacs data.

Data access service: these products are delivered through the authenticated FTP.
Description: gridded product  in delayed time at high resolution (1/4°x1/4°, cartesian grid).
Geographic coverage: global
Format: NetCDF-CF. A quicklook (.png) is also provided for each map.
Tools:

New reference period: In the Duacs 2014 version (v15.0), the reference period of the Sea Level Anomalies is based on a 20-year [1993, 2012] period whereas in the former version it was on a 7-year [1993, 1999] period.

To allow the users to ensure this consistency between the (M)SLA and MDT products, new "ref20yto7y" products are added to the catalogue. They consist of corrective maps that allow the user to change the reference period of the (M)SLA and MDT products from 20 years to 7 years. Depending on your application, you may wish to use this improved 20-year reference or you may wish to keep the original 7-year reference period. Further information: How to manage the change?

Monthly mean Maps of Sea Level Anomaly

Description: Averaged DT-MSLA corresponds to the daily maps of delayed-time sea level anomalies averaging month by month from January 1993. 

Copyright : 2009-ongoing CLS

SatelliteDistribution mediaFrequencyData periodFile weight
Merged

FTP
Avg MSLA

3-4 months January 1993 - ongoing1.2 MB per file (zipped)

Seasonal mean Maps of Sea Level Anomaly

Description: Averaged DT-MSLA corresponds to the daily maps of delayed-time sea level anomalies averaging season by season: January-February-March / April-May-June / July-August-September / October-November-December from 1993.

Copyright : 2010-ongoing CLS

SatelliteDistribution mediaFrequencyData periodFile weight
Merged

FTP
Seasonal MSLA

6 months January 1993 - ongoing1 MB per file (zipped)

Climatological Maps of Sea Level Anomaly

Description: Climatological Maps of Sea Level Anomaly are calculated from the maps of delayed-time sea level anomalies over a same month from January 1993 to the last extension of the Delayed-time products. We obtain one data file and one map for each month.

Copyright : 2009-ongoing CLS

SatelliteDistribution mediaFrequencyData periodFile weight
Merged

FTP
MSLA climatology

6 months January 1993 - ongoing1 MB per file (zipped)
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