High Latitude Sea and Ice Surface Temperature Licensed under CC BY 4.0 by EUMETSAT
Documentation

Northern High Latitude L3 Sea and Sea Ice Surface Temperature

Operational Near real time product

Level 3 twice-daily sub-skin Sea and Sea-ice Surface Temperature derived from AVHRR on Metop, over northern high latitudes (Poleward of 50N) and re-projected on a polar stereographic at 5 km resolution four times a day, in GHRSST-like netCDF format. A similar product derived from VIIRS on NOAA exists.

Identification
Acronym : NHL L3 SST/IST
Product navigator reference :

EO:EUM:DAT:0068

OSI SAF producer : Norwegian Meteorological Institute
Identifier : OSI-203-a
Acronym for EDC (APNM) : OSSTIST3A
License/Attribution : See at bottom
Characteristics
Processing level : L3
Satellite input : Metop-B/AVHRR
Other input : ECMWF outputs
Temporal sampling : 2 per day
Central time : 00:00, 12:00
Timeliness : ? The timeliness is the time elapsing from the sensing time of the last contributing file to the product dissemination to users. It is similar to the latency. 3h30
Spatial coverage : Poleward of 50N
Spatial sampling : 5 km
Projection : polar stereographic
File Formats : HL FTP Server (NetCDF4), EDC (NetCDF4), EUMETCast (NetCDF4)
Characteristics & methods : SST : subskin temperature. Multispectral algorithms
IST : skin temperature. Multispectral algorithms.
Probabilities of open water and sea ice. Single sensor analysis.
Data Access

OSI SAF FTP server (last 31 days)

ftp://osisaf.met.no/prod/

Directory: sst/l3c

OSI SAF FTP server (archive)

ftp://osisaf.met.no/archive/

Directory: sst/l3c

EUMETSAT Multicast

Accuracy Requirements
Target accuracy : SST absolute mean difference: 0.7 K, SST std: 1.0 K; IST absolute mean difference: 1.5 / 3.5 K, IST std: 2.0 / 3.0 K; PoD: 0.80 FAR: 0.20
Verification/validation method : SST : comparison with buoy measurements; IST: Comparison with buoy measurements on the ice, and IR radiometer when available; Comparison with high resolution manual ice charts
Applications and users
Usage : * Operational Met Services
* Operational analyses and ocean models
* Research or Environmental monitoring.
History
Authorised to be operational / released :
Declared operational / released since :
On EUMETCast since :
On EDC since :
On FTP server since :
First date :
Full series temporal coverage : 2012-onwards
License/Attribution
License/Attribution : Licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0) by EUMETSAT.

Whether you’re displaying the product as-is or if you have used it as input data, please use one of the following attribution:

Figures (short): "EUMETSAT OSI SAF OSI-203-a"

Texts (long): “Data source: EUMETSAT OSI SAF, Northern High Latitude L3 Sea and Sea Ice Surface Temperature (Metop-B) (2019), OSI-203-a.”

Papers: “EUMETSAT Ocean and Sea Ice Satellite Application Facility, Northern High Latitude L3 Sea and Sea Ice Surface Temperature (Metop-B) (2019), OSI-203-a.”
Comments
  • Monthly accuracies.
    Include sea ice surface temperature and Sea Ice Probabilities.
    The IST accuracy requirements are split in two: the first is for validation against in situ IR radiometers, the second for in situ buoy data. The reason for this is discussed in the ATBD for OSI-205.

    Superseds OSI-203 from 03/04/2019, together with OSI-203-a.

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