Mobile version

Tracking El Niño

Lively Data : July 21, 2003

El Niño is one of the most monitored ocean phenomena (see Applications: El Niño). The 2002-2003 event thus was spotted very early, on the sea level anomalies maps (especially those from Near-real time data such as Ssalto/Duacs), and was monitored all along 2002 (see the "El Niño bulletin")
The LAS able to see this phenomenon on the sea level anomaly maps. A specific area "Equatorial Pacific" is predefined, and maps can be drawn for every week from August 2001. To better estimate the evolution between two dates, there are comparison functions in the LAS.



To use LAS comparison function, click on "compare two", and take the same data as variables (e.g. here "Maps of Sea level anomalies - Merged"). Then, choose two dates, here November 6 and December 4, 2002. Three comparison functions are available as outputs: difference ("comparison plot", 1st data minus 2nd data), overlay (mostly useful to compare two different datasets on a same period), and visual comparison (adjacent plot).
After setting the color scale to (-30,30,2), you can have the maps right; Top, difference (December 4 minus November 6), where you can see that the phenomenon intensity decreased in a month; middle, November 6 map and bottom December 4 one)
(Click on the map to enlarge them).

Use the  Live Access Server

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!