Licensed under CC BY 4.0 by EUMETSAT
Northern High Latitude L3 Sea and Sea Ice Surface Temperature
Operational Near real time productLevel 3 twice-daily sub-skin Sea and Sea-ice Surface Temperature derived from VIIRS on NOAA, 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 AVHRR on Metop exists.
Identification
Acronym : NHL L3 SST/IST
EUMETSAT collection ref. :
EO:EUM:DAT:0068
OSI SAF producer : Norwegian Meteorological Institute
Identifier : OSI-203-b
Characteristics
Processing level : L3
Satellite input : NPP/VIIRS
Other input : NWP outputs, OSTIA SST analysis
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 Format(s) : NetCDF4
Characteristics & methods : SST : subskin temperature.
IST : skin temperature.
Probabilities of open water and sea ice.
Multispectral algorithms.
IST : skin temperature.
Probabilities of open water and sea ice.
Multispectral algorithms.
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
OSI SAF Thredds
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.
* 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 :
Expected date for operational/released :
First date :
Full series temporal coverage : 2012-onwards
Licence/Attribution/Citation
Licence : CC BY 4.0
Attribution : You must include attribution to EUMETSAT OSI SAF
Recommended citation : EUMETSAT OSI SAF, Northern High Latitude L3 Sea and Sea Ice Surface Temperature (NPP) (2019), OSI-203-b
Comments
New ticket helpdesk
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.