OSI SAF central
OSI SAF sea ice concentration to be updated 4th July 2017The OSI SAF sea ice concentration product (OSI-401-b) is being updated, due to previously announced spurious ice over open water. To deal with this spurious ice, a new filtered sea ice concentration field is being introduced to the OSI-401-b product. Spurious ice can occur in the OSI SAF sea ice concentration fields, due to weather effects and the uncertainty of the measurement over open water. The spurious ice is problematic for some users. The filtered product removes most of this spurious ice, at the cost of also removing some valid low concentration ice. The spurious ice is removed using two extra filters: a 2m air temperature and an open water filter. The updated product also contains information about which filters have been applied, in an update "status_flag" variable and and additional "masks" variable.
The filtered ice concentration field is described in the PUM and validation report. For more details about the current operational product, see: http://osisaf.met.no/p/ice/index.html#conc-ssmis>.
Previously, there was only one ice concentration field in the product. In the new version, you may choose from either the filtered or unfiltered variables:
The unfiltered ice concentration field is no longer available in the GRIB file, as it has been replaced by the filtered one; it is recommended to use the netCDF product files to access the unfiltered ice concentration, if required.
This change will be implemented 4th July 2017.
ContactFor questions, please contact us on email osisaf-manager[at]met.no.