<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="margin: 0px; ">The Developmental Testbed Center (DTC) is pleased to announce the release of the following community data assimilation systems:</div><div style="margin: 0px; "><ul><li>Version 3.4 of the Community Gridpoint Statistical Interpolation (GSI) data assimilation system </li><li>Version 1.0 of the Community Ensemble Kalman Filter (EnKF) data assimilation system</li></ul></div><div style="margin: 0px; ">GSI and EnKF are currently the operational data assimilation system for NCEP’s GFS. GSI is also used by other operational models, e.g., NAM and HWRF (NCEP), Rapid Refresh (NOAA), GEOS (NASA), etc. The two systems share the same observation operators inside GSI and can be run with both global (e.g., GFS) and regional models (ARW, NMM, NMM-B).</div><div style="margin: 0px; min-height: 14px; "><br></div><div style="margin: 0px; ">The released package for GSI and EnKF and their documentation can be accessed through the system homepage listed as follows:</div><div style="margin: 0px; color: rgb(4, 51, 255); "><ul><li><span style="color: rgb(0, 0, 0); ">GSI home page: </span><a href="x-msg://554/%22">http://www.dtcenter.org/com-GSI/users/index.php</a></li><li><span style="color: rgb(0, 0, 0); ">EnKF home page: </span><a href="x-msg://554/%22">http://www.dtcenter.org/EnKF/users/index.php</a></li></ul></div><div style="margin: 0px; min-height: 15px; ">Questions and inquiries can be sent to either <a href="mailto:gsi_help@ucar.edu"><span style="color: rgb(4, 51, 255); ">gsi_help@ucar.edu</span></a> and <span style="text-decoration: underline; color: rgb(4, 51, 255); "><a href="mailto:enkf_help@ucar.edu">enkf_help@ucar.edu</a></span>.</div><div style="margin: 0px; min-height: 15px; "><br></div><div style="margin: 0px; ">The DTC is a distributed facility, with a goal of bridging the research and operational communities. This code release is sponsored by National Oceanic and Atmospheric Administration (NOAA) and NCAR. NCAR is supported by the National Science Foundation (NSF).</div><div style="margin: 0px; min-height: 15px; "><br></div><div style="margin: 0px; min-height: 15px; "><br></div><div style="margin: 0px; ">DTC Data Assimilation Team</div><div apple-content-edited="true">
<div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">===================================</div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dr. Hui Shao<br><br>Data Assimilation Team Lead<br>Developmental Testbed Center (DTC)<br><a href="http://www.dtcenter.org/">http://www.dtcenter.org/</a><br><br>Project Scientist<br>Research Applications Laboratory (RAL)<br>National Center for Atmospheric Sciences (NCAR)<br>Email: huishao@ucar.edu<br><br>Visiting Scientist<br>Environmental Modeling Center (EMC)/Joint Center for Satellite Data Assimilation (JCSDA)<br>National Centers for Environmental Prediction (NCEP)<br>Email: hui.shao@noaa.gov</div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">===================================</div></div><div><br></div><br class="Apple-interchange-newline">
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