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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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