| 22 |
|
|
| 23 |
<body> |
<body> |
| 24 |
|
|
| 25 |
<p>The <b>MITgcm</b> (<b>MIT</b> <b>G</b>eneral <b>C</b>irculation |
<p>The <b>MITgcm</b> (<b>MIT</b> <b>G</b>eneral <b>C</b>irculation |
| 26 |
<b>M</b>odel) is a numerical model for |
<b>M</b>odel) is a numerical model designed for study of the |
| 27 |
studying the ocean and atmosphere. It is capable of simulating these |
atmosphere, ocean, and climate. Its non-hydrostatic formulation |
| 28 |
fluids at a wide range of scales and can resolve many different |
enables it to simulate fluid phenomena over a wide range of |
| 29 |
processes. It has a non-hydrostatic capability (Marshall et al., JGR 1997a |
scales; its adjoint capability enables it to be applied to |
| 30 |
& b) and uses the finite volume method to accurately represent the |
parameter and state estimation problems. By employing fluid |
| 31 |
bottom boundary position (Adcroft et al., MWR 1998).<br /><br /></p> |
isomorphisms, one hydrodynamical kernel can be used to simulate |
| 32 |
|
flow in both the atmosphere and ocean.</p> |
| 33 |
<!-- |
|
| 34 |
|
<p>You are welcome to <a href="http://mitgcm.org/source_code.html"> |
| 35 |
To add News items, please copy the following block outside these comments and |
download</a> and use MITgcm.</p> |
| 36 |
replace the ===DATE=== and ===MESSAGE=== place-holders with your date and your |
|
| 37 |
text: |
<p>Papers charting the development of MITgcm <a |
| 38 |
|
href="http://paoc.mit.edu/cmi/publications.htm">can be found here. |
| 39 |
<p><b>===DATE=== :</b><br /></p> |
</a></p> |
| 40 |
|
|
| 41 |
<blockquote> |
<hr align="center" size="1" width="75%" /> |
| 42 |
===MESSAGE===<br /><br /> |
|
| 43 |
</blockquote> |
<div class="c1"><br /><span class="c3"><b>News</b></span></div> |
| 44 |
|
|
| 45 |
--> |
<!-- |
| 46 |
<p><b>December 9th 2003 :</b><br /></p> |
To add News items, please copy the following block outside these comments |
| 47 |
|
and replace the ===DATE=== and ===MESSAGE=== place-holders with your date |
| 48 |
<blockquote> |
and your text: |
| 49 |
The new continuous testing page at <a href="http://mitgcm.org/testing.html">http://mitgcm.org/testing.html</a> |
|
| 50 |
provides information on the status of the latest development code. The page |
<p><b>===DATE=== :</b></p> |
| 51 |
shows summary pass/fail ratios for the MITgcm regression tests on various platforms. |
<blockquote> |
| 52 |
Details on the platforms being tested and detailed information on the status of individual |
===MESSAGE=== |
| 53 |
regression tests can be viewed from links on the test page. |
</blockquote> |
| 54 |
<br /><br /> |
--> |
| 55 |
</blockquote> |
|
| 56 |
|
<p><b>March 19, 2007 :</b></p> |
| 57 |
<p><b>October 27th 2003 :</b><br /></p> |
<blockquote> |
| 58 |
|
Breaking News: The MITgcm is now able to generate Sea-Ice Donuts. |
| 59 |
<blockquote> |
In a push to move forward MITgcm on the path of fundamental science and climate |
| 60 |
<b><a href="http://paoc.mit.edu/cmi/">MIT Climate Modeling Initiative |
understanding, David Ferreira and Jean-Michel Campin |
| 61 |
(CMI)</a></b> web pages introduce the MITgcm model, its applications, and |
simulated a Sea-ice Donut using a coupled AquaPlanet configuration (see |
| 62 |
the development team.<br /><br /> |
movie <A href=movies/Sea_Ice_Donut_x1.mpg>here</A>). |
| 63 |
</blockquote> |
This experiment was initialized with the T and S fields from |
| 64 |
|
a previous Aquaplanet run which has polar sea-ice caps. These |
| 65 |
<p><b>October 21st 2003 :</b><br /></p> |
caps are associated with salt-compensated temperature inversions in the upper |
| 66 |
|
ocean. The new run is initialized without sea-ice and within a month, large |
| 67 |
<blockquote> |
sea-ice caps grow over the poles, rejecting salt. This triggers convection which |
| 68 |
MITgcm and ECCO-JPL team <b><a |
in turns brings relatively warm water to the surface and melts the ice close |
| 69 |
href="http://www.sgi.com/newsroom/press_releases/2003/october/linux.html"> |
to the poles. Here we have a <A href=movies/Sea_Ice_Donut_x1.mpg>donut</A>. |
| 70 |
feature as showcase application</a></b> in NASA-SGI large shared |
Look out for that chapter on aqua-planets in the next IPCC report! |
| 71 |
memory system program.<br /><br /> |
</blockquote> |
| 72 |
</blockquote> |
|
| 73 |
|
<p><b>Feb 04, 2007 :</b></p> |
| 74 |
|
<blockquote> |
| 75 |
|
News is back by popular request. New advection schemes are currently |
| 76 |
|
being tested. Some preliminary results from the new schemes can be seen |
| 77 |
|
<A href=news/advection_testing_jan07/advection_testing.html> |
| 78 |
|
here. |
| 79 |
|
</A> |
| 80 |
|
The plots show a tracer being transported and stretched in the |
| 81 |
|
MITgcm advect_xz verification test. Both new schemes (OS7MP |
| 82 |
|
and Prather second-order scheme with limiting) have very low implied |
| 83 |
|
diffusivity. |
| 84 |
|
We are currently evaluating the |
| 85 |
|
schemes to assess their implied diffusivity, with a bottle of |
| 86 |
|
Jean-Michel's favorite Belgian |
| 87 |
|
beer going to the the least diffusive scheme - watch this space! |
| 88 |
|
</blockquote> |
| 89 |
|
|
| 90 |
|
<p><b>March 9, 2005 :</b></p> |
| 91 |
|
<blockquote> |
| 92 |
|
A short article entitled |
| 93 |
|
"NASA Supercomputer Improves Prospects for Ocean Climate Research" |
| 94 |
|
in the current EOS (volume 86, number 9, March 1 2005) |
| 95 |
|
gives a succinct overview of some of the advanced high-resolution |
| 96 |
|
state-estimation work being undertaken with MITgcm by members |
| 97 |
|
of the ECCO consortium. The article describes |
| 98 |
|
ground-breaking computational |
| 99 |
|
technologies that have enabled this work and outlines the future goals of |
| 100 |
|
this next generation planetary scale assimilation initiative. A pdf containing |
| 101 |
|
the article can be found |
| 102 |
|
<a href="http://mitgcm.org/articles/EOSecco.pdf"> |
| 103 |
|
here. |
| 104 |
|
</a> |
| 105 |
|
</blockquote> |
| 106 |
|
|
| 107 |
|
<p><b>Sep 24, 2004 :</b></p> |
| 108 |
|
<blockquote> |
| 109 |
|
MITgcm is now able to write and (to a lesser extent) read NetCDF files. |
| 110 |
|
The framework (the "MNC" package) has been tested by numerous developers |
| 111 |
|
on literally dozens of machines and, for the past month, has been a |
| 112 |
|
working part of our standard verification suite. We encourage MITgcm |
| 113 |
|
users (especially new users) to try out the MNC package since the model |
| 114 |
|
output is now much easier to read and understand. For further NetCDF |
| 115 |
|
information please see: |
| 116 |
|
<ul> |
| 117 |
|
<li><a href="http://mitgcm.org/cmi_redir.php/package_mnc"> |
| 118 |
|
Manual entry for the MNC package.</a></li> |
| 119 |
|
<li>Directions <a |
| 120 |
|
href="http://mitgcm.org/pipermail/mitgcm-support/2004-September/002589.html"> |
| 121 |
|
from our email archives</a> and <a |
| 122 |
|
href="http://mitgcm.org/mwiki/index.php/MNC_Package">from our |
| 123 |
|
wiki</a> for installing NetCDF.</li> |
| 124 |
|
<li>The <a |
| 125 |
|
href="http://my.unidata.ucar.edu/content/software/netcdf/index.html"> |
| 126 |
|
main NetCDF web site</a>.</li> |
| 127 |
|
</ul> |
| 128 |
|
</blockquote> |
| 129 |
|
|
| 130 |
|
<p><b>May 20, 2004 at 05:01 EDT :</b></p> |
| 131 |
|
<blockquote> |
| 132 |
|
Congratulations to Ed and Boo on the birth this |
| 133 |
|
morning of a 7lb 1oz, baby girl, |
| 134 |
|
<a href="http://eddy.csail.mit.edu/gallery/Alex-Arrives">Alexandra Sophia</a>. |
| 135 |
|
</blockquote> |
| 136 |
|
|
| 137 |
|
<p><b>April 13, 2004 :</b></p> |
| 138 |
|
<blockquote> |
| 139 |
|
A new movie by Dimitris Menemenlis and Chris Henze shows ice dynamics |
| 140 |
|
over the North Pole. The viscous-plastic behavior of ice sheets subject |
| 141 |
|
to wind forcing and ocean currents can be clearly seen in the |
| 142 |
|
translucent ice-sheet. The movie can be downloaded from <a |
| 143 |
|
href="movies/ice_03.mpg"> here</a> (this one is 91MB!). A set of web |
| 144 |
|
pages with summary information regarding MITgcm simulations being |
| 145 |
|
carried out in the ECCO high resolution global ocean state estimation |
| 146 |
|
initiative can be found <a href="http://ecco.jpl.nasa.gov/cube_sphere"> |
| 147 |
|
here</a>. |
| 148 |
|
</blockquote> |
| 149 |
|
|
| 150 |
|
<p><b>March 26, 2004 at 01:38 EST :</b></p> |
| 151 |
|
<blockquote> |
| 152 |
|
Congratulations to Alistair and Sonya on the birth this |
| 153 |
|
morning of a 7lb 3oz, 19.5 inches long baby girl, Ariane Jade. |
| 154 |
|
</blockquote> |
| 155 |
|
|
| 156 |
|
<p><b>January 22, 2004 :</b></p> |
| 157 |
|
<blockquote> |
| 158 |
|
A spectacular movie by Chris Henze of NASA AMES beautifully captures an |
| 159 |
|
eddy permitting expanded cube sphere MITgcm simulation being carried out, |
| 160 |
|
as part of the <a href="http://www.ecco-group.org">ECCO</a> project, by |
| 161 |
|
Dimitris Menemenlis and others at JPL with help from core MITgcm team members |
| 162 |
|
and staff from NASA AMES. The animation |
| 163 |
|
shows the speed of ocean currents at 15m depth from the simulation, it can be |
| 164 |
|
downloaded <a href=news/cube_6.mpg>here</a> (its 47MB |
| 165 |
|
but worth waiting for!). A second animation with different perspectives and |
| 166 |
|
rotation can be downloaded <a href=news/cube_7.mpg>here</a>. |
| 167 |
|
As described <a href=news/agu_2004/menemenlis_et_al.pdf>here</a> Dimitris Menemenlis |
| 168 |
|
will be presenting aspects of this calculation at AGU in Portland. |
| 169 |
|
A list of some other AGU 2004 presentation abstracts related to MITgcm can be |
| 170 |
|
found <a href=news/agu_2004>here</a>. |
| 171 |
|
</blockquote> |
| 172 |
|
|
| 173 |
</body> |
</body> |
| 174 |
</html> |
</html> |
| 175 |
|
|
Parent Directory
| 
Revision Log
| 
Revision Graph
| 
Patch