Select the area (for time series only), corrections and the kind of plot (map or time serie curve) you wish, visualise the corresponding mean sea level and download the data (NetCDF or ASCII format)

Quick-look of selected data. Click on "download the image" to retrieve the image in high resolution or on "download the data" to get the data.

	Map Map	Time serie
ZONE	Global North Atlantic South Atlantic North Pacific South Pacific Indian Mediterranean Black Sea North Hemisphere South Hemisphere Global
SATELLITE	Reference*(1) Topex/Poseidon	Jason-1 Jason-2	Envisat Multi-mission(2)
CORRECTIONS	Applied corrections Inverted barometer; Radiometer wet troposphere* Inverted barometer; Model wet troposphere Inverted barometer; Model wet troposphere Inverted barometer correction not applied; Radiometer wet troposphere   Inverted barometer correction not applied; Radiometer wet troposphere	Seasonal signal**           Removed* Not removed   Not removed	Glacial Isostatic Adjustment            Applied* Applied Not Applied

* prefered settings
** seasonal, annual signals
⁽¹⁾"Reference" products are computed with the T/P-Jason-1-Jason-2 serie for the time series and with merged datasets for the maps;
⁽²⁾"multi-mission" products include all the satellite time series overlaid after being adjusted from biases. The multi-mission time series are available only as images.

December 2012

• Jason-2:
  • new GDR-D orbit standards.
  • New corrections: MSS_CNES_CLS11, tide model: Got4.8

September 2012

• Jason-1 (cycles 228 to 259) take now into account the JMR replacement product. The cycles 1 to 227 remain unchanged.

April 2012

• Envisat time series extended before 2004 starting from Mai 2002.
• Envisat V2.1 GDR reprocessed data used. The new standards are also detailled in the table "Processing and corrections".
• Instrumental correction sign corrected (impact of around +2mm/year). The error detection and impact on data is detailled in:
  • Envisat 2011 yearly report, A. Ollivier & M. Guibbaud
  • Envisat Reprocessing impact on ocean data, A.Ollivier & M. Guibbaud
  • A.Ollivier et al. 2012, Envisat ocean altimeter becoming relevant for mean sea level long term studies? (submitted in Marine Geodesy)
• new NetCDF CF format in the products and images selection interface

April 2011:

• Time series for Reference mission (T/P-J1-J2) are available for ALL areas,
• Three areas are added: Black Sea, North & South Hemispheres.

August 2010:

• Two different datasets merging satellites are now available:
  • reference for the T/P-J1-J2 homogeneous time series or the merged data for the maps
  • multi-mission, a plot combining all the satellites MSL curves (no data available, only time-series).

May 2010:

• MSL curves and data provided by Envisat and Jason-2 missions have been added.
• For all missions, MSL data have been reprocessed with GOT4.7 tidal model.
• T/P MSL have been reprocessed with a new SSB solution (Tran et al., 2010) and GSFC orbit.

January 2010: Jason-1 data computed using reprocessed GDR-C data (see Jason-1 GDR handbook for more information about this new version and its contents).

June 2009: a new option, to take the Glacial Isostatic Adjustment into account, is now available. This applies only on the global time series.

December 6, 2007: A new option is available for Jason-1 mean sea level.
Wet tropospheric correction can derive from radiometer measurements or from a model (ECMWF) (up till the recent Jason-1 data re-processing, radiometer measurements weren't really usable for mean sea level, and only the model was used). But these two data sources both can vary (model update, yet uncorrected problem on the radiometer data, etc.). We now propose both possibilities for Jason-1 mean sea level data. This should enable a quicker detection of any problem on either one.
Mean sea level computation is one of the most sensitive altimetry applications. This is why it is one of the indicators monitoring continuously the altimetry data quality (Calval).