Mobile version

Eddies' birth and decay around Antarctica

Image of the Month - May 2018

Part of the ocean heat, energy etc. are carried by eddies more than by the major current and their steady flow. Thus a better knowledge of eddies is important to understand the ocean dynamics.

In the Antarctic Circumpolar Current, specific regions can be delineated where eddies are born and where they mostly stay into. Those formation sites are downstream and on top of big topographic features, such as the Drake Passage, the Western Indian Ridge, the Kerguelen Plateau and Eastern Indian Ridge, the Campbell Plateau and Macquarie Ridge or the Eltanin Fracture Zone. Within the boundaries of the Antarctic Circumpolar Current eddies propagate Eastward. North and South of this current, eddies propagate Westward with a zonal drift in accordance with was found in other regions of the world ocean.

A 25 year long time series of eddy detection is now available and enable to better understand the general dynamics and average behavior of ocean features. With Jason-3, Sentinel-3A and the newly launched Sentinel-3B, the series is continuing even longer.

See also:

Websites on this subject:


  • Uriel Zajaczkovski, S. Gille and M. Mazloff: Eddy generation and decay in the Southern Ocean. J. Phys. Oceanogr. Under review


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!