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<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:36.0pt;font-family:"Cambria","serif";color:#6c3fb5">JCSDA
Seminar</span></b></p>
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<p class="MsoNormal" align="right" style="text-align:right"><b><span style="font-size:14.0pt">Title</span></b></p>
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<p class="MsoNormal"><b><span style="font-family:"Arial","sans-serif"">Navy Coastal Ocean Model (NCOM) Four
Dimensional Variational (4D-Var) Data Assimilation System: Initial Experiments in the Monterey Bay,
Hawaiian, and Gulf of Mexico Regions</span></b></p>
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<p class="MsoNormal" align="right" style="text-align:right"><b><span style="font-size:14.0pt">Speaker</span></b></p>
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<p class="MsoNormal"><b><span style="font-size:14.0pt;font-family:"Arial","sans-serif"">Hans Ngodock </span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Naval
Research Lab</span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><b><span style="font-size:14.0pt">Date, Time & Place</span></b></p>
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<p class="MsoNormal"><b><span style="font-size:14.0pt;font-family:"Arial","sans-serif"">Tuesday,
August 27, 2013 2:00-3:00 PM</span></b><span style="font-size:11.0pt;font-family:"Arial","sans-serif""><br>
Auditorium, NOAA Center for Weather and Climate Prediction, 5830 University Research Court, College
Park, MD</span><span style="font-family:"Arial","sans-serif""></span></p>
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<p class="MsoNormal" align="right" style="text-align:right"><b><span style="font-size:14.0pt">Abstract</span></b></p>
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<p class="MsoNormal" style="text-align:justify;text-justify:inter-ideograph"><a name="140a6595c67dcaf4_140a6586e4ab3dd4__GoBack"></a>A 4DVAR data assimilation system has recently been
developed for the NCOM and has been demonstrated using real ocean
observations in this study. The
NCOM-4DVAR is formulated for weak-constraint data assimilation based on the
in-direct representer method. In this
study, satellite data consisting of sea surface temperatures (SSTs) as well
as in-situ data from Airborne eXpendable BathyThermographs (AXBTs), ARGO
floats, and gliders is used to derive optimal corrections to the ocean model
background and surface forcing provided by the atmospheric model. Three regional domains have been selected
for this study: the first consists of
the waters adjacent to Monterey Bay, California during the AOSN-II
experiment; the second in a region surrounding Hawaii during the RIMPAC08
experiment; and a third region consisting of the Gulf of Mexico during the
Grand Lagrangian Deployment (GLAD) surface drifter experiment. This Gulf of Mexico domain includes
traditional observations as well as surface ocean velocity measurements
derived from drifter position data. It
is shown that the NCOM-4DVAR can correct the model solution via control of
the initial conditions and model error terms and produce an improved forecast
as a result. Also the NCOM-4DVAR can
produce optimal corrections to the atmospheric forcing based on ocean
data. These corrections alone can be
applied to the specified surface forcing to produce an improved ocean
forecast.</p>
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<p class="MsoNormal" align="right" style="text-align:right"><b><i><span style="font-size:14.0pt">Remote
Access</span></i></b><i></i></p>
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<p class="MsoNormal"><b><i><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Video:</span></i></b><i><span style="font-size:11.0pt;font-family:"Arial","sans-serif""> 1.</span> </i><i><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Go to </span></i><a href="https://star-nesdis-noaa.webex.com/" target="_blank"><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">JCSDA Seminar</span></i></a><i> and click on the seminar title</i><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><br>
</span></i><i><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">2. Enter your name and email address. <br>
3. No password is necessary<br>
4. Click "Join Now". <br>
5. Follow the instructions that appear on your screen. <br>
<b>Audio: </b>USA participants:
1-866-715-2479, Passcode: 9457557<br>
International:
1-517-345-5260</span></i><i><span style="font-family:"Arial","sans-serif""></span></i></p>
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<p class="MsoNormal" align="right" style="text-align:right"><b><span style="font-size:14.0pt">Contact</span></b></p>
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<p class="MsoNormal">If you would like to
present a seminar contact <a href="mailto:Kevin.Garrett@noaa.gov" target="_blank">Kevin.Garrett@noaa.gov</a></p>
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<p class="MsoNormal" align="right" style="text-align:right"><b><span style="font-size:14.0pt">Seminar Files</span></b></p>
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<p class="MsoNormal">Slides available prior to,
and audio recording after, the presentation at <a href="http://www.jcsda.noaa.gov/JCSDASeminars.php" target="_blank">http://www.jcsda.noaa.gov/JCSDASeminars.php</a></p>
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</tbody></table><div><br></div>-- <br><div dir="ltr"><div style="text-align:left"><br></div><div style="text-align:left"><font face="arial, helvetica, sans-serif" color="#6600cc"><span><b><i>Ana Carrion</i></b></span></font></div>
<div style="text-align:left"><span><font size="1" face="arial, helvetica, sans-serif">National Oceanic and Atmospheric Administration</font></span></div><div style="text-align:left">
<font size="1" face="arial, helvetica, sans-serif">Program Support Specialist</font></div><div style="text-align:left"><font size="1" face="arial, helvetica, sans-serif">Riverside (RTi) at NOAA/NESDIS/STAR/JCSDA</font></div>
<div style="text-align:left"><font size="1" face="arial, helvetica, sans-serif">NCWCP, E/RA, Room #2600</font></div><div style="text-align:left"><font size="1" face="arial, helvetica, sans-serif">5830 University Research CT</font></div>
<div style="text-align:left"><font size="1" face="arial, helvetica, sans-serif">College Park, MD 20740-3818</font></div><div style="text-align:left"><font size="1" face="arial, helvetica, sans-serif"><br>
</font></div><div style="text-align:left"><font size="1" face="arial, helvetica, sans-serif">Email: <a href="mailto:Ana.Carrion@noaa.gov" target="_blank">Ana.Carrion@noaa.gov</a></font></div>
<div style="text-align:left"><font size="1" face="arial, helvetica, sans-serif"><b>JCSDA Main: 301-683-3615</b></font></div><div style="text-align:left"><font size="1" face="arial, helvetica, sans-serif"><b>Direct: 301-683-3520</b></font></div>
<div style="text-align:left"><font size="1" face="arial, helvetica, sans-serif">Fax: 301-683-3526</font></div><div style="text-align:left"><font face="georgia, serif"><br></font></div>
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