Mobile version

Variability of Mediterranean Sea

Lively Data: March 20, 2009

The LAS is not only a graphical interface; it can also compute statistics over data.

Like all seas and oceans over the world, the Mediterranean Sea has a spatial and temporal variability. By representing the sea level anomalies variance (or standard deviation - or rms - which is calculated by the root square of variance) over all the available period (1992-2008), strong, medium and low variability areas are described throughout the basin.

Variability ranges between 4 and 17 cm rms. Areas with lower variability (<6 cm rms) are located in the western basin, along the coasts of Italy and France. On the contrary, the highest variability (> 16 cm rms) is observed on the south-east of Crete (Ierapetra gyre). A variability more moderate (from 8 to 12 cm rms) is observed in the western basin. We can also observe the signature of the permanent / recurrent movements over the Alboran Sea, northern Tyrrhenian basin and southern Greece.

Merged Sea Level Anomaly rms in the Mediterranean Sea over all the available period October 1992- June 2008. To plot such a map, you have to select the dataset Delayed-time, the regional product, i.e. Mediterranean Sea, the variable (here Maps of Sea Level Anomalies Merged), and afterwards click on the left menu on "Define variable". You have the choose between "average", "minimum", "maximum", "sum" and "variance". So, we choose the variance and the period as defined above. Then click on "next" in order to fill in land areas and calculate the rms: in evaluate expression, we note $^0.5 to tranlate rms=√(variance). The variance map is available by clicking here.

Further information:

  • Data: Delayed-time MSLA for Mediterranean Sea.
  • Mediterranean Sea related-links on Aviso website.
  • Pujol M.-I., 2006, "Analyse de la variabilité de surface en Méditerranée à partir des données altimétriques et comparaison aux simulations MERCATOR et MOG2D", Thesis from University Paul Sabatier, Toulouse III.
EnglishFrançaisEspañol
Rss feedsContactSitemapPartnersFAQGlossaryLexiconMobile
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

The new 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!