The MITgcm (MIT General Circulation
Model) is a numerical model designed for study of the
atmosphere, ocean, and climate. Its non-hydrostatic formulation
enables it to simulate fluid phenomena over a wide range of
scales; its adjoint capability enables it to be applied to
parameter and state estimation problems. By employing fluid
isomorphisms, one hydrodynamical kernel can be used to simulate
flow in both the atmosphere and ocean.
You are welcome to
download and use MITgcm.
Papers charting the development of MITgcm can be found here.
News
January 15, 2008 :
Breaking News: Hidden up-to-date Documentation escaped from hide-out:
Latest Online Documentation
March 19, 2007 :
Breaking News: The MITgcm is now able to generate Sea-Ice Donuts.
In a push to move forward MITgcm on the path of fundamental science and climate
understanding, David Ferreira and Jean-Michel Campin
simulated a Sea-ice Donut using a coupled AquaPlanet configuration (see
movie here).
This experiment was initialized with the T and S fields from
a previous Aquaplanet run which has polar sea-ice caps. These
caps are associated with salt-compensated temperature inversions in the upper
ocean. The new run is initialized without sea-ice and within a month, large
sea-ice caps grow over the poles, rejecting salt. This triggers convection which
in turns brings relatively warm water to the surface and melts the ice close
to the poles. Here we have a donut.
Look out for that chapter on aqua-planets in the next IPCC report!
Feb 04, 2007 :
News is back by popular request. New advection schemes are currently
being tested. Some preliminary results from the new schemes can be seen
here.
The plots show a tracer being transported and stretched in the
MITgcm advect_xz verification test. Both new schemes (OS7MP
and Prather second-order scheme with limiting) have very low implied
diffusivity.
We are currently evaluating the
schemes to assess their implied diffusivity, with a bottle of
Jean-Michel's favorite Belgian
beer going to the the least diffusive scheme - watch this space!
March 9, 2005 :
A short article entitled
"NASA Supercomputer Improves Prospects for Ocean Climate Research"
in the current EOS (volume 86, number 9, March 1 2005)
gives a succinct overview of some of the advanced high-resolution
state-estimation work being undertaken with MITgcm by members
of the ECCO consortium. The article describes
ground-breaking computational
technologies that have enabled this work and outlines the future goals of
this next generation planetary scale assimilation initiative. A pdf containing
the article can be found
here.
Sep 24, 2004 :
MITgcm is now able to write and (to a lesser extent) read NetCDF files.
The framework (the "MNC" package) has been tested by numerous developers
on literally dozens of machines and, for the past month, has been a
working part of our standard verification suite. We encourage MITgcm
users (especially new users) to try out the MNC package since the model
output is now much easier to read and understand. For further NetCDF
information please see:
May 20, 2004 at 05:01 EDT :
Congratulations to Ed and Boo on the birth this
morning of a 7lb 1oz, baby girl,
Alexandra Sophia.
April 13, 2004 :
A new movie by Dimitris Menemenlis and Chris Henze shows ice dynamics
over the North Pole. The viscous-plastic behavior of ice sheets subject
to wind forcing and ocean currents can be clearly seen in the
translucent ice-sheet. The movie can be downloaded from here (this one is 91MB!). A set of web
pages with summary information regarding MITgcm simulations being
carried out in the ECCO high resolution global ocean state estimation
initiative can be found
here.
March 26, 2004 at 01:38 EST :
Congratulations to Alistair and Sonya on the birth this
morning of a 7lb 3oz, 19.5 inches long baby girl, Ariane Jade.
January 22, 2004 :
A spectacular movie by Chris Henze of NASA AMES beautifully captures an
eddy permitting expanded cube sphere MITgcm simulation being carried out,
as part of the ECCO project, by
Dimitris Menemenlis and others at JPL with help from core MITgcm team members
and staff from NASA AMES. The animation
shows the speed of ocean currents at 15m depth from the simulation, it can be
downloaded here (its 47MB
but worth waiting for!). A second animation with different perspectives and
rotation can be downloaded here.
As described here Dimitris Menemenlis
will be presenting aspects of this calculation at AGU in Portland.
A list of some other AGU 2004 presentation abstracts related to MITgcm can be
found here.
|