14.10.2011 :: Operational webpage is not running anymore
14.02.2011 :: Due to a bug in the salinity on the Operational Topaz run,
the nesting is operated by Topaz free run for the moment.
11.02.2011 :: The Framstrait model is spun-up with Hycom 2.2.12. In addition
the tides are included (barotropic forcing at the open boundaries).
01.02.2011 :: Dany Dumont does not maintain this page anymore. See new contact
09.08.2010 :: The criterion differentiating MIZ and VP regimes was updated based
on results obtained with a waves-in-ice model. The MIZ regime is now allowed for
concentration higher than c=0.89, but for ice thinner than a concentration-dependent
value prescribed by a linear function. For e.g., 0.5m-thick ice will be in the
MIZ regime even for c=1.
20.04.2010 :: A change in the server configuration at NERSC corrupted some of
the operational scripts for a certain period. These scripts have been updated
and the system is now operational and up-to-date again.
25.02.2010 :: Change of colorbar for ice thickness and concentration. The new
colormaps better match the WMO color code for ice type and concentration.
They also have been applied in TOPAZ ice forecasts for the Beaufort Sea. The MIZ
boundary is no more highlighted since the definition of the
MIZ dynamical regime will soon be updated with a wave parameterization.
12.11.2009 :: Change of colorbar for ice thickness and speed.
09.11.2009 :: Page set-up improvements.
02.11.2009 :: The map domain has been modified to better focus on the model
domain. Time stepping of the EVP model has been tuned to damp out an
instability observed north of Greenland. In order to minimize the consequences of
past instabilities, the model has been rerun with a clean restart from 28
October 2009. To avoid further instabilities, the MIZ criterion has been updated
to limit the MIZ regime for thickness below 2.0m. Finally, the strength parameter
(Pstar) has been changed from 35e3 to 27.5e3 Pa m.
21.10.2009 :: Archived images consist now of forecast maps with the stellite
derived ice edge superposed (from 15 September until 3 days before the present
20.10.2009 :: Change of colorbar for the ice concentration maps to better
highlight the two different dynamical regimes, namely the viscous-plastic regime,
characterized by the green zone, and the collisional regime of the MIZ,
characterized by the yellow-orange-red zone. The ice edge (=0.15) is in the
white zone while low concentration ice (<0.15) is coloured in blue. Vectors are
plotted each 10 instead of each 8.
15.10.2009 :: Addition of the System description section where current versions of
model and forecast systems in operation are desribed. If you want more details
about the system, please send an email to the contact person.
22.09.2009 :: Addition of a Validation section with archived forecast maps on which is
superposed the ice edge position retrieved from AMSR-E satellite data.
17.09.2009 :: Addition of two new sections to this page: Archive and Updates.
09.09.2009 :: Bug in ice drift velocity display. Speeds were divided
by the ice concentration while it was not required. Speed values are now smaller
than before, especially in areas of low ice concentration.
27.08.2009 :: Change of colorbar to match those used in other areas.
11.08.2009 :: Launch of the operational Fram Strait model providing 3-day forecasts
of sea ice variables and updated every day.