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<p class="MsoNormal" style="text-align:right" align="right"><b style><span style="font-size:14.0pt"> </span></b></p>
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<p class="MsoNormal" style="text-align:center" align="center"><b style><span style="font-size:36.0pt;font-family:"Cambria","serif";color:#6c3fb5">JCSDA
Seminar</span></b></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b style><span style="font-size:14.0pt">Title</span></b></p>
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<p class="MsoNormal" style><b><span style="font-size:16.0pt;font-family:"Arial","sans-serif"">Data
Assimilation Progress and Plans at ECMWF</span></b><b style><span style="font-size:20.0pt;font-family:"Arial","sans-serif""></span></b></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b style><span style="font-size:14.0pt">Speaker</span></b></p>
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<p class="MsoNormal" style><b style><span style="font-size:14.0pt;font-family:"Arial","sans-serif"">Lars
Isaksen<br>
European Center for Medium-range Weather Forecasting </span></b><span style="font-size:14.0pt;font-family:"Arial","sans-serif""></span></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b style><span style="font-size:14.0pt">Date, Time & Place</span></b></p>
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<p class="MsoNormal" style><b style><span style="font-size:14.0pt;font-family:"Arial","sans-serif"">Friday,
April 19, 2013</span></b><b style><span style="font-size:16.0pt;font-family:"Arial","sans-serif""><br>
</span></b><span style="font-family:"Arial","sans-serif"">2:00 – 3:00 PM<br>
</span><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Conference
Center, NOAA Center for Weather and Climate Prediction, <span style>5830 University Research Court, College
Park, MD</span></span><span style="font-family:"Arial","sans-serif""></span></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b style><span style="font-size:14.0pt">Abstract</span></b></p>
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<p class="MsoPlainText" style="text-align:justify;text-justify:inter-ideograph"><a name="_GoBack"></a><span style="font-size:11.0pt;font-family:"Arial","sans-serif"" lang="EN-GB">The operational
4-Dimensional Variational (4DVAR) data assimilation system at the European
Centre for Medium-range Weather Forecasts (ECMWF) has recently been extended
to a hybrid system, where flow-dependent background error variances are provided
by an Ensemble of 4DVAR Data Assimilations (EDA). The EDA has also been used to
compute new climatological background error covariances. With the next
upgrade, in June 2013, the EDA will be extended from 10 to 25 members and
used for on-line estimation of wavelet based background error covariances. All
these background error related upgrades result in significant analysis and
forecast improvements. The following operational upgrade, planned for the end
of 2013, will extend the 4DVAR analysis window from 12 hours to 24 hours, run
twice daily. The analysis resolution will also be increased. <span style> </span>The seminar will present results of these
recent upgrades and discuss the related challenges, like the accuracy of
tangent-linear approximation and scalability of 4DVAR. The seminar will also
cover recent progress in land surface analysis. A new soil moisture analysis
and new snow analysis have been implemented recently. Work is on-going to
assimilate ASCAT and SMOS soil moisture satellite data, in addition to
comprehensive hydrological validation activities. Other important activities
like refactoring of software, improved handling of large volumes of
observations, advanced diagnostics and improved observation error
characterization will be covered briefly. </span><span style="font-size:11.0pt;font-family:"Arial","sans-serif""></span></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b style><span style="font-size:14.0pt">Remote Access</span></b></p>
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<p class="MsoNormal" style><b style><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Video:</span></b><span style="font-size:11.0pt;font-family:"Arial","sans-serif""> 1.</span> <span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Go to </span><a href="https://star-nesdis-noaa.webex.com/"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">JCSDA Seminar</span></a> and click on the seminar title<span style="font-size:10.0pt;font-family:"Arial","sans-serif""><br>
</span><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">2. Enter your
name and email address. <br>
3. Enter the meeting password: JCSDAseminars707<br>
4. Click "Join Now". <br>
5. Follow the instructions that appear on your screen. <br>
<b style>Audio: </b>USA participants:
1-866-715-2479, Passcode: 9457557<br>
International:
1-517-345-5260</span><span style="font-family:"Arial","sans-serif""></span></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b style><span style="font-size:14.0pt">Contact</span></b></p>
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<p class="MsoNormal" style>If you would like to
present a seminar contact <a href="mailto:George.Ohring@noaa.gov">George.Ohring@noaa.gov</a></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b style><span style="font-size:14.0pt">Seminar File</span></b></p>
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<p class="MsoNormal" style>Slides available prior to,
and audio recording after, the presentation at <a href="http://www.jcsda.noaa.gov/JCSDASeminars.php">http://www.jcsda.noaa.gov/JCSDASeminars.php</a></p>
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