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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        &amp; 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===&nbsp;:</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          To add News items, please copy the following block outside these comments
47      <p><b>October 27th 2003&nbsp;:</b><br /></p>        and replace the ===DATE=== and ===MESSAGE=== place-holders with your date
48          and your text:
49          <blockquote>        
50            <b><a href="http://paoc.mit.edu/cmi/">MIT Climate Modeling Initiative        <p><b>===DATE===&nbsp;:</b></p>
51                (CMI)</a></b> web pages introduce the MITgcm model, its applications, and        <blockquote>
52            the development team.<br /><br />        ===MESSAGE===
53          </blockquote>        </blockquote>
54              -->
55      <p><b>October 21st 2003&nbsp;:</b><br /></p>  
56          <p><b>January 15, 2008&nbsp;:</b></p>
57          <blockquote>        <blockquote>
58            MITgcm and ECCO-JPL team <b><a        Breaking News: Hidden up-to-date Documentation escaped from hide-out:
59              href="http://www.sgi.com/newsroom/press_releases/2003/october/linux.html">        <br>
60              feature as showcase application</a></b> in NASA-SGI large shared        <A href="http://eddy.csail.mit.edu/r2/latest/">Latest Online Documentation</A>
61              memory system program.<br /><br />        <br>
62          </blockquote>        <img src="docfest2008.jpeg" alt="DocFestJan2008" border="0" width="86" height="86" />
63                  </blockquote>
64    
65          <p><b>March 19, 2007&nbsp;:</b></p>
66          <blockquote>
67          Breaking News:  The MITgcm is now able to generate Sea-Ice Donuts.
68          In a push to move forward MITgcm on the path of fundamental science and climate
69          understanding, David Ferreira and Jean-Michel Campin
70          simulated a Sea-ice Donut using a coupled AquaPlanet configuration (see
71          movie <A href=movies/Sea_Ice_Donut_x1.mpg>here</A>).
72          This experiment was initialized with  the T and S fields from
73          a previous Aquaplanet run which has polar sea-ice caps. These
74          caps are associated with salt-compensated temperature inversions in the upper
75          ocean. The new run is initialized without sea-ice and within a month, large
76          sea-ice caps grow over the poles, rejecting salt. This triggers convection which
77          in turns brings relatively warm water to the surface and melts the ice close
78          to the poles. Here we have a <A href=movies/Sea_Ice_Donut_x1.mpg>donut</A>.
79          Look out for that chapter on aqua-planets in the next IPCC report!
80          </blockquote>
81    
82          <p><b>Feb 04, 2007&nbsp;:</b></p>
83          <blockquote>
84           News is back by popular request. New advection schemes are currently
85           being tested. Some preliminary results from the new schemes can be seen
86           <A href=news/advection_testing_jan07/advection_testing.html>
87           here.
88           </A>
89           The plots show a tracer being transported and stretched in the
90           MITgcm advect_xz verification test. Both new schemes (OS7MP
91           and Prather second-order scheme with limiting) have very low implied
92           diffusivity.
93           We are currently evaluating the
94           schemes to assess their implied diffusivity, with a bottle of
95           Jean-Michel's favorite Belgian
96           beer going to the the least diffusive scheme - watch this space!
97          </blockquote>
98    
99          <p><b>March 9, 2005&nbsp;:</b></p>
100          <blockquote>
101           A short article entitled
102           "NASA Supercomputer Improves Prospects for Ocean Climate Research"
103           in the current EOS (volume 86, number 9, March 1 2005)
104           gives a succinct overview of some of the advanced high-resolution
105           state-estimation work being undertaken with MITgcm by members
106           of the ECCO consortium. The article describes
107           ground-breaking computational
108           technologies that have enabled this work and outlines the future goals of
109           this next generation planetary scale assimilation initiative. A pdf containing
110           the article can be found
111           <a href="http://mitgcm.org/articles/EOSecco.pdf">
112           here.
113           </a>
114          </blockquote>
115          
116          <p><b>Sep 24, 2004&nbsp;:</b></p>
117          <blockquote>
118            MITgcm is now able to write and (to a lesser extent) read NetCDF files.
119            The framework (the "MNC" package) has been tested by numerous developers
120            on literally dozens of machines and, for the past month, has been a
121            working part of our standard verification suite.  We encourage MITgcm
122            users (especially new users) to try out the MNC package since the model
123            output is now much easier to read and understand.  For further NetCDF
124            information please see:
125            <ul>
126              <li><a href="http://mitgcm.org/cmi_redir.php/package_mnc">
127                  Manual entry for the MNC package.</a></li>
128              <li>Directions <a
129                  href="http://mitgcm.org/pipermail/mitgcm-support/2004-September/002589.html">
130                  from our email archives</a> and <a
131                  href="http://mitgcm.org/mwiki/index.php/MNC_Package">from our
132                  wiki</a> for installing NetCDF.</li>
133              <li>The <a
134                  href="http://my.unidata.ucar.edu/content/software/netcdf/index.html">
135                  main NetCDF web site</a>.</li>
136            </ul>
137           </blockquote>
138          
139          <p><b>May 20, 2004 at 05:01 EDT&nbsp;:</b></p>
140          <blockquote>
141            Congratulations to Ed and Boo on the birth this
142            morning of a 7lb 1oz, baby girl,
143            <a href="http://eddy.csail.mit.edu/gallery/Alex-Arrives">Alexandra Sophia</a>.
144          </blockquote>
145          
146          <p><b>April 13, 2004&nbsp;:</b></p>
147          <blockquote>
148            A new movie by Dimitris Menemenlis and Chris Henze shows ice dynamics
149            over the North Pole. The viscous-plastic behavior of ice sheets subject
150            to wind forcing and ocean currents can be clearly seen in the
151            translucent ice-sheet. The movie can be downloaded from <a
152            href="movies/ice_03.mpg"> here</a> (this one is 91MB!).  A set of web
153            pages with summary information regarding MITgcm simulations being
154            carried out in the ECCO high resolution global ocean state estimation
155            initiative can be found <a href="http://ecco.jpl.nasa.gov/cube_sphere">
156              here</a>.
157          </blockquote>
158    
159          <p><b>March 26, 2004 at 01:38 EST&nbsp;:</b></p>
160          <blockquote>
161            Congratulations to Alistair and Sonya on the birth this
162            morning of a 7lb 3oz, 19.5 inches long baby girl, Ariane Jade.
163          </blockquote>
164    
165          <p><b>January 22, 2004&nbsp;:</b></p>
166          <blockquote>
167            A spectacular movie by Chris Henze of NASA AMES beautifully captures an
168            eddy permitting expanded cube sphere MITgcm simulation being carried out,
169            as part of the <a href="http://www.ecco-group.org">ECCO</a> project, by
170            Dimitris Menemenlis and others at JPL with help from core MITgcm team members
171            and staff from NASA AMES. The animation
172            shows the speed of ocean currents at 15m depth from the simulation, it can be
173            downloaded <a href=news/cube_6.mpg>here</a> (its 47MB
174            but worth waiting for!). A second animation with different perspectives and
175            rotation can be downloaded <a href=news/cube_7.mpg>here</a>.
176            As described <a href=news/agu_2004/menemenlis_et_al.pdf>here</a> Dimitris Menemenlis
177            will be presenting aspects of this calculation at AGU in Portland.
178            A list of some other AGU 2004 presentation abstracts related to MITgcm can be
179            found <a href=news/agu_2004>here</a>.
180          </blockquote>
181                
182    </body>    </body>
183  </html>  </html>
184    
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