U. S. Navy Polar Ice Prediction System Upgrade
Welcome to the PIPS 3.0 page. This site has been set up
to provide a means for investigators associated with the Navy Polar Ice
Prediction System upgrade to exchange information and ideas. The goal
of PIPS 3.0 is to update PIPS using the latest physics and
computational advances in a parallel computing environment.
The model development team welcomes feedback from all
interested parties, particularly those who will be running the model
operationally at the Fleet Numerical Meteorology and Oceanography
Center (FNMOC) in Monterey and
the end users at the National Ice Center (NATICE) in Suitland.
Some possible areas for comment:
During model spin-up, processing time for a coupled
ice*-ocean model is three hours of processor time per week of
integration and seven days of processor time per year of integration on
128 processors of the T3E at the Arctic
Region Supercomputer Center in Fairbanks, Alaska. Future
testing on DSM machines is planned. Is this fast enough for
operational purposes? (* the coupled ice and ocean models
are currently earlier reconfigured versions. The ocean model
will be upgraded to POP 1.1.1 and the new ice model is discussed on the Ice Model Improvements page.)
We have improved the vertical resolution in the
model so the arctic shelves, continental slopes and submarine ridges
are accurately represented hence the 45 levels. This allows 17 levels
in the upper 300 m and a maximum layer thickness in the deep ocean of
300m. (click here for vertical resolution
The high vertical resolution raises a question
about forcing for the 9 km Stand-Alone Sea Ice Model. What
level or levels of temperature, salinity and velocity fields should be
archived for use in a stand-alone or coupled sea ice model?
Layer 2 in the 9 km ocean model represents circulation from 5-10m.
Would a deeper layer be more appropriate, or perhaps an average of
several layers, say 5-8 (26-53 m)?
Any other comments?
Comments/questions can be put on the web or sent
directly to Wieslaw Maslowski
Circulation of the Baltic Sea and
its connection to the Pan-Arctic region - a large scale and high-resolution
(Maslowski, W. and W. Walczowski,
Boreal Environment Research, Vol.7, No.4, pp.319-325, 2002)
PDF version (3.6MB)
On Large Scale Shift in the Arctic
Ocean and Sea Ice Conditions during 1979-1998
(Maslowski et al.,
Annals of Glaciology, Vol.33, pp.545-550, 2001)
Modeling Recent Climate Variability in the
(Maslowski et al., Geophys. Res. Ltrs.,
Vol.27, No.22, pp.3743-3746, 2000)
HTML version (33 kB)
PDF version (161 kB)
of other publications (pdf 5.6kB)
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Maslowski email@example.com (831)
Naval Postgraduate School
833 Dyer Road
Monterey, CA 93943-5122
Fax (831) 656-2712
The PIPS upgrade and development of the 9km ocean
model are funded with grants from:
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