Mobile version

News

22.06.2023 10:21 Age: 255 days

El Niño’s back in 2023

Category: Ocean and climate news

Altimetry sea level anomalies have been showing an elevation all along the Equator in the Pacific for the past four months.

Longitude-time diagram over 2021-2023, showing sea level anomalies averaged of 2°S-2°N across the whole equatorial Pacific.(data EU Copernicus Marine service, from all available altimeters on any day). Kelvin waves can be seen as elevations propagating from west to east of the basin. (data EU Copernicus Marine Service, figure Aviso)

Altimetry sea level anomalies have been showing an elevation all along the Equator in the Pacific for the past four months.

 

These positive anomalies across the Equatorial Pacific are among the early warning signs of an upcoming El Niño. Altimetry enables to monitor the phenomena at global scale, and thus add information to the in situ array installed there (TAO). The elevation reached the coasts of Equator in March, but has just triggered a reaction from the atmosphere, which is the actual El Niño.

 

Models show a high probability of an El Niño developing in the second half of 2023. It is a bit early to assert its magnitude, though, since some west wind gusts can still dampen the phenomenon, but it seems more than likely that there will be an El Niño this Christmas. The Equatorial Pacific will be closely monitored in the coming months for this.

 

From the first El Niño monitored by Topex/Poseidon in 1994, the altimetry satellites have brought knowledge and foresight to help in mitigating the impacts of the phenomenon in a large part of the world.


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!