ODYSSEA Brazil/Tropical Atlantic High-Resolution Sea Surface Temperature Gridded Level 4 Daily Analysis

This L4 SST product is produced at ultra-high resolution (UHR) on a 0.02 x 0.02 degree grid (approximately 2 x 2 km) for the Tropical Atlantic area, every 24 hours. Optimal interpolation (OI) techniques are used to combine coincident swath measures of SST from different types of sensor and to fill gaps where no observations are available.

Whereas swath data essentially represent the skin or sub-skin SST, the L4 SST product is defined to represent the SST foundation (SSTfnd). SSTfnd is defined within GHRSST-PP as the temperature at the base of the diurnal thermocline. It is so named because it represents the foundation temperature on which the diurnal thermocline develops during the day. SSTfnd changes only gradually along with the upper layer of the ocean, and by definition it is independent of skin SST fluctuations due to wind- and radiation-dependent diurnal stratification or skin layer response. It is therefore updated at intervals of 24 hrs. SSTfnd corresponds to the temperature of the upper mixed layer which is the part of the ocean represented by the top-most layer of grid cells in most numerical ocean models. It is never observed directly by satellites, but it comes closest to being detected by a microwave radiometer which penetrates the skin, at dawn when the previous day's diurnal stratification can be assumed to have decayed and SSTsubskin, SSTdepth and SSTfnd are equal.

Citation proposal
. ODYSSEA Brazil/Tropical Atlantic High-Resolution Sea Surface Temperature Gridded Level 4 Daily Analysis. https://services.mspdata.eu:/geonetwork/srv/api/records/CER-SST-BRA-1D-002-ODY-MGD

Alternate title: CER-SST-BRA-1D-002-ODY-MGD

Date

Point of contact

Helpdesk

Principal investigator

Emmanuelle Autret, Jean-François Piollé

Originator

Ifremer / CERSAT

Distributor

Ifremer / CERSAT

funder

ESA

GEMET - INSPIRE themes, version 1.0 ( Theme )

Oceanographic geographical features

Cersat - Parameter ( Theme )

Ocean Temperature

Cersat - Project ( Theme )

Medspiration , GHRSST

Cersat - Latency ( Theme )

Less than 24 hours

Cersat - GCMD parameter ( Theme )

/Ocean Temperature/Sea Surface Temperature

Centre de données ODATIS ( Theme )

CDS-SAT-CERSAT

Variables ODATIS ( Theme )

/Physical Oceanography/Temperature

Type de jeux de donnée ODATIS ( Theme )

/Remote sensing

Thèmatiques ODATIS ( Theme )

Remote sensing

Specific usage: Update

User determined limitations

Specific usage: Issue

Date ( validityBegins )

Date ( validityExpires )

Use limitation

Access constraints: unrestricted

Use constraints: These data are produced for ESA/Medspiration project and were obtained from the Centre de Recherche et d'Exploitation Satellitaire (CERSAT), at IFREMER, Plouzané (France)

Other constraints

Other constraints: These data are produced for ESA/Medspiration project and were obtained from the Centre de Recherche et d'Exploitation Satellitaire (CERSAT), at IFREMER, Plouzané (France)