GMAO - Global Modeling and Assimilation Office Research Site

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height:22px;" type="image" alt="Search" src="/images/search_go.jpg" onclick="this.form.submit();" class="flt_left" /> <input type="hidden" value="gmao.gsfc.nasa.gov" name="sitesearch" /> </form> <div class="divClear"></div> <p> <a href="http://science.gsfc.nasa.gov/sed/index.cfm?fuseAction=home.main&&navOrgCode=610">Earth Sciences Division</a> <span class="listdevider">| </span> <a href="http://sciences.gsfc.nasa.gov/">Sciences and Exploration</a> </p> </div> </div> <div class="hidden"> <a href="#skipping" title="Skip Navigation" accesskey="2">Skip Navigation (press 2)</a> </div> <div id="banner">  <div id="bannerImg"> <a href="/"><img src="/images/gmao-bnr.png" alt="Global Modeling and Assimilation Office" style="width:1080px;" /></a> </div> </div> <div class="divClear"></div>  <div id="topMenu"> <ul id="menu">    <li><a href="/weather_prediction/" class="">WEATHER ANALYSIS<br />& PREDICTION</a></li> <li><a href="/seasonal2/" class="">SEASONAL-DECADAL<br /> ANALYSIS & PREDICTION</a></li> <li class="active"><a href="/reanalysis/">REANALYSIS</a></li> <li><a href="/global_mesoscale/" class="">GLOBAL MESOSCALE MODELING</a></li> <li class=""><a href="/observing_sys_science/" class="topMenu-last-itm">OBSERVING SYSTEM SCIENCE</a></li> </ul> </div> <div id="content" style="background-color:rgba(255,255,255,0.03);"> <div id="leftsideWrapper">  <div id="leftnav" style="min-height:400px; 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min-height:452px;"> <p>Long-term, model-based analyses of multiple datasets using a fixed assimilation system are a major focus in the GMAO. Building on the success of the atmospheric reanalyses conducted with GEOS, current research and development activities are directed at producing a major Earth System Reanalysis, including atmosphere, land, ocean, and ice. </p> <h3>MERRA-2</h3> <p>The Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2) provides data beginning in 1980 and runs a few weeks behind real time. Alongside the meteorological data assimilation using a modern satellite database, MERRA-2 includes an interactive analysis of aerosols that feed back into the circulation, uses NASA's observations of stratospheric ozone and temperature (when available), and takes steps towards representing cryogenic processes. </p> <h3>MERRA</h3> <p>The Modern-Era Retrospective analysis for Research and Applications (MERRA) dataset was released in 2009. It is based on a version of the GEOS-5 atmospheric data assimilation system that was frozen in 2008. MERRA data span the period 1979 through February 2016 and were produced on a 0.5° 脳 0.66° grid with 72 layers. MERRA was used to drive stand-alone reanalyses of the land surface (MERRA-Land) and atmospheric aerosols (MERRAero). </p> <p><a href="https://gmao.gsfc.nasa.gov/news/geos_system_news/2016/MERRA_ends.php" style="font-weight:600;">NOTE: MERRA production was discontinued with the completion of analyses through February 29, 2016</a>. </p> <div style="height:0.5rem;"></div> <div class="linkbar"> <p><a href="./MERRA-2/" style="color:#fff;">MERRA-2 Project Page</a> </p> </div> <div class="linkbar"> <p><a href="/GMAO_products/reanalysis_products.php" style="color:#fff;">GMAO Reanalysis Products</a> </p> </div> <div class="linkbar"> <p><a href="https://fluid.nccs.nasa.gov/reanalysis/" style="color:#fff;">Reanalysis Visualizations</a> </p> </div> <div style="height:2em;"></div> </div> </div>   </div> </div> <div class="divClear"></div> <div id="footer"> <div> <a href="https://www.nasa.gov" class="imageLink"><img src="/images/nasa-logo.svg" alt="NASA Logo, National Aeronautics and Space Administration" height="85" style="margin-left: 20px;" /></a> </div>  <div id="footer-signature"> <a href="https://science.gsfc.nasa.gov/earth/" class="imageLink"><img src="/images/ESD-logo.png" weight="230" height="47" alt="Earth Sciences" /></a> </div> <div class="nasafootlinks"id="footerLeft"> <ul> <li>Responsible NASA Official : <br />  <a href="mailto:Steven.Pawson-1@nasa.gov">Steven Pawson</a></li> <li>Web Curator:  <br />  <a href="mailto:bennett.erdman@nasa.gov">Bennett Erdman</a></li> </ul> </div> <div class="nasafootlinks" id="footerRight" style="zoom:reset;"> <ul> <li> <a target="_blank" href="https://www.nasa.gov/about/highlights/HP_Privacy.html">Privacy Policy & Important Notices</a> </li> <li> <a target="_blank" href="https://www.nasa.gov/accessibility/">NASA's Accessibility Statement</a> </li> <li> <a href="/contact.php">Contact Us</a> </li> <li>Page Last Updated: 03/19/2020</li> </ul> </div> </div> </div> </div> </body> </html>

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GMAO - Global Modeling and Assimilation Office Research Site