Near-real-time Sea Level Anomalies
shows the variation of Sea Level Anomalies on a global scale.
the Ssalto multimission altimeter data processing system, creates maps
every Wednesday and Saturday.
Sea Level Anomalies are departures of
the sea surface from some long term mean.
Positive anomalies indicate more heat content (warmer waters, a deeper thermocline)
whereas negative anomalies indicate less heat content (cooler waters, a
Generally, sea level is higher than average in the
northern hemisphere in July and August when waters are warmed by more
direct solar radiation and is lower than average in February and March
when the incoming solar flux reduces.
These sea level anomalies
maps derive from a combination of data coming from altimeters on-bord
Jason-1 and Envisat. Combining data from several satellites gives a better
space/time resolution, thus enabling a better mesoscale circulation
observation. More information can be found at
Source: CNES (Centre
National d'Etudes Spatiales); CLS
(Collecte Localisation Satellites).
Keywords: ESA European
Space Agency - Agence spatiale europeenne,
observation de la terre, earth observation,
satellite remote sensing,
teledetection, geophysique, altimetrie, radar,
chimique atmospherique, geophysics, altimetry, radar,