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     <title>MITgcm: <!--ADDTITLE--></title>  
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22    
23    <body>    <body>
24    
25      <p>The MITgcm (MIT General Circulation Model) is a numerical model for      <p>The <b>MITgcm</b> (<b>MIT</b> <b>G</b>eneral <b>C</b>irculation
26        studying the ocean and atmosphere. It is capable of simulating these        <b>M</b>odel) is a numerical model designed for study of the
27        fluids at a wide range of scales and can resolve many different        atmosphere, ocean, and climate. Its non-hydrostatic formulation
28        processes. It has a non-hydrostatic capability (Marshall et al., JGR 1997a        enables it to simulate fluid phenomena over a wide range of
29        &amp; b) and uses the finite volume method to accurately represent the        scales; its adjoint capability enables it to be applied to
30        bottom boundary position (Adcroft et al., MWR 1998).<br /><br /></p>        parameter and state estimation problems. By employing fluid
31          isomorphisms, one hydrodynamical kernel can be used to simulate
32  <!--        flow in both the atmosphere and ocean.</p>
33    
34  To add News items, please copy the following block outside these comments and      <p>You are welcome to <a href="http://mitgcm.org/source_code.html">
35  replace the ===DATE=== and ===MESSAGE=== place-holders with your date and your        download</a> and use MITgcm.</p>
36  text:  
37        <p>Papers charting the development of MITgcm <a
38      <p><b>===DATE===&nbsp;:</b><br /></p>        href="http://paoc.mit.edu/cmi/publications.htm">can be found here.
39          </a></p>
40          <blockquote>  
41            ===MESSAGE===<br /><br />      <hr align="center" size="1" width="75%" />
42          </blockquote>  
43        <div class="c1"><br /><span class="c3"><b>News</b></span></div>
44  -->        
45          <!--
46      <p><b>October 27th 2003&nbsp;:</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            <b><a href="http://paoc.mit.edu/cmi/">MIT Climate Modeling Initiative        
50                (CMI)</a></b> web pages introduce the MITgcm model, its applications, and        <p><b>===DATE===&nbsp;:</b></p>
51            the development team.<br /><br />        <blockquote>
52          </blockquote>        ===MESSAGE===
53              </blockquote>
54      <p><b>October 21st 2003&nbsp;:</b><br /></p>        -->
55    
56          <blockquote>        <p><b>March 19, 2007&nbsp;:</b></p>
57            MITgcm and ECCO-JPL team <b><a        <blockquote>
58              href="http://www.sgi.com/newsroom/press_releases/2003/october/linux.html">        Breaking News:  The MITgcm is now able to generate Sea-Ice Donuts
59              feature as showcase application</a></b> in NASA-SGI large shared        In a push to move forward MITgcm on the path of fundamental science and climate
60              memory system program.<br /><br />        understanding, David Ferreira and Jean-Michel Campin
61          </blockquote>        simulated a Sea-ice Donut using a coupled AquaPlanet configuration (see
62                  movie <A href=movies/Sea_Ice_Donut_x1.mpg>here</A>).
63          This experiment was initialized with  the T and S fields from
64          a previous Aquaplanet run which has polar sea-ice caps. These
65          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          sea-ice caps grow over the poles, rejecting salt. This triggers convection which
68          in turns brings relatively warm water to the surface and melts the ice close
69          to the poles. Here we have a <A href=movies/Sea_Ice_Donut_x1.mpg>donut</A>.
70          Look out for that chapter on aqua-planets in the next IPCC report!
71          </blockquote>
72    
73          <p><b>Feb 04, 2007&nbsp;:</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&nbsp;:</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&nbsp;:</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&nbsp;:</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&nbsp;:</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&nbsp;:</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&nbsp;:</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    
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