Mobile version

News

16.03.2023 14:40 Age: 351 days

GMSL Update: integration of Sentinel-6 Michael Freilich

Category: Website updates

The Aviso global mean sea level (GMSL) time series has been recently updated with the Sentinel-6MF mission

Reference global mean sea level (GMSL) from January 1993 to present, after removing the annual and semi-annual signals and applying a 6-month filter. Postglacial rebound correction is applied. Credits CNES/LEGOS/CLS.

The reference GMSL is determined by using the TOPEX/Poseidon, Jason-1, Jason-2, Jason-3 and Sentinel-6MF missions from January 1993 to February 2023, after removing the annual and semi-annual signals and applying a 6-month filter and the postglacial rebound correction (-0.3 mm/yr).

The rise in GMSL is thus estimated to 3.6 mm/year (with an uncertainty of 0.3 mm/yr) since 1993.

All information available at https://www.aviso.altimetry.fr/msl 

Note that:

- The Jason-3 / Sentinel-6MF intermission bias of -0.21 cm has been applied. Indeed, to ensure the accuracy of the long-term GMSL estimates, calibration phases between successive missions (called tandem phases) are performed to estimate their relative measurements biases. These biases are computed as the mean difference of the GMSL measurements between the two successive missions while they fly in tandem. Detailed information are available at https://www.aviso.altimetry.fr/en/data/products/ocean-indicators-products/mean-sea-level/processing-and-corrections.html 

- The GMSL estimate takes into account the Sentinel-6 MF inaccurate radiometer calibration error over the last quarter of year 2022 resulting in an overestimation of the wet tropospheric correction, affecting the GMSL estimate by about 5 mm during that period.

 


EnglishFrançais
Rss feedsContactPartnersFAQLexiconLegal noticePersonal Data Protection PolicyMobile
You must enable cookies in your browser preferences to save the modifications
You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

Customize the home page

View all widgets
Reduce display
Public profile
User profile

Select/Deselect widgets

Discover AVISO+

Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

Customizable homepage

This home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Reading tools

Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

Products search guide

The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

AVISO+ Multimedia

The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!