edcd9174-4f81-4036-9617-d2526de053f3 2023-10-05T12:45:45.405Z ISO 19115-3:2018 - Remote Sensing http://www.opengis.net/def/crs/EPSG/0/4326 GHRSST Level 4 DMI_OI Global Foundation Sea Surface Temperature Analysis 2007-09-08 released DMI_OI-DMI-L4-GLOB-v1.0 A Group for High Resolution Sea Surface Temperature (GHRSST) gap-free (L4) Sea Surface Temperature (SST) analysis produced daily on an operational basis by the Danish Meteorological Institute (DMI) using an optimal interpolation (OI) approach on a global 0.05 degree grid. Whereas along swath observation data essentially represent the skin or sub-skin SST, the L4 SST product is defined to represent the foundation (SSTfnd). SSTfnd is defined within GHRSST 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. 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 infrared and microwave radiometers during the night, when the previous day's diurnal stratification can be assumed to have decayed. The processing combines night-time GHRSST L2P skin and subskin SST observations from several satellites. The data is inter-calibrated and bias corrected before being merged and interpolated using an optimal interpolation scheme to provide daily gap-free fields. The optimal interpolation scheme uses the previous days analysis as a background field. An ice field from the EUMETSAT OSI-SAF is used to mask out areas with ice. onGoing DMI > Danish Meteorological Institute originator Ioanna Karagali DMI > Danish Meteorological Institute ika@dmi.dk pointOfContact PO.DAAC distributor https://sextant.ifremer.fr/geonetwork/srv/api/records/edcd9174-4f81-4036-9617-d2526de053f3/attachments/DMI_OI-DMI-L4-GLOB-v1.0.jpg DMI_OI-DMI-L4-GLOB-v1.0.jpg Oceanographic geographical features GEMET - INSPIRE themes, version 1.0 2018-07-27 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Ocean Temperature Cersat - Parameter 2023-03-16 publication 2023-03-16 publication geonetwork.thesaurus.local.theme.cersat_parameter GHRSST Cersat - Project 2023-03-31 publication 2023-03-31 publication geonetwork.thesaurus.local.theme.cersat_project Less than 24 hours Cersat - Latency 2023-06-06 publication 2023-06-06 publication geonetwork.thesaurus.local.theme.cersat_latency /Ocean Temperature/Sea Surface Temperature Cersat - GCMD parameter 2022-04-05 publication 2022-04-05 publication geonetwork.thesaurus.external.theme.GCMDparameter Type de jeux de donnée - ODATIS 2020-06-09 publication geonetwork.thesaurus.local.theme.type_jeux_donnee None CC-BY (Creative Commons - Attribution) Danish Meteorological Institute, Center for Ocean and Ice. 2007. GHRSST L4 DMI Global Sea Surface Temperature analysis. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/GHGDM-4FD02 grid 0.05 -180.00 180.00 -90.00 90.00 Global 2013-04-30 composite L4 NetCDF 4 https://podaac.jpl.nasa.gov/dataset/DMI_OI-DMI-L4-GLOB-v1.0# WWW:LINK Product notices Product information https://podaac.jpl.nasa.gov/dataset/DMI_OI-DMI-L4-GLOB-v1.0#capability-modal-download WWW:LINK Access data https://doi.org/10.5067/GHGDM-4FD02 DOI Digital Object Identifier (DOI)