<b><font size="4">Note: This seminar will take place in the NCWCP Auditorium.<br></font><br></b>
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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:18.0pt;font-family:"Arial","sans-serif"">Impact of NPP Satellite Assimilation
in the U.S. Navy Global Modeling System</span></b><b style><span style="font-size:18.0pt;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"><b style><span style="font-size:14.0pt;font-family:"Arial","sans-serif"">Ben Ruston<br>
Naval Research Laboratory </span></b><b style><span style="font-size:16.0pt;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">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"">Wednesday,
December 12, 2012<br>
</span></b><b style><span style="font-family:"Arial","sans-serif";color:red">2:00 – 3:00 PM, Auditorium,</span></b><span style="font-family:"Arial","sans-serif""> NOAA Center for Weather and Climate
Prediction, <span style>5830 University Research
Court, College Park, MD </span></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="MsoNormal" style="text-align:justify;text-justify:inter-ideograph"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">The Suomi NPP
satellite has 3 sensors, ATMS, CrIS, and OMPS, which are of high interest for
assimilation into the Navy's 4-Dimensional Variational (4D-Var) assimilation
system, NAVDAS-AR.<span style> </span>This presentation
will primarily address the work done with the ATMS sensor, and will show some
of the early work with OMPS; however, the assimilation of CrIS will be saved
for a future date.<span style> </span>The core of the
Navy's global forecast system is the 42-level NOGAPS model and the follow-on
system is the 50-level NAVGEM model. Both have a model top of 0.04 hPa and
both are accompanied by the 4D-Var system, NAVDAS-AR.<span style> </span>The system currently assimilates radiances
from microwave (AMSU-A, MHS, SSMIS) and infrared satellite sounders (AIRS and
IASI) in addition to the bending angle from GNSS-RO.<span style> </span>The current NAVDAS-AR system can compute
bias corrections for satellite radiances from either an offline Harris-Kelley
type approach, or using a variational bias correction (varBC).<span style> </span>The experiments using the 42-level NOGAPS
model use a Harris-Kelly bias correction, while NAVGEM experiments use the varBC.<span style> </span>The assimilation of ATMS produces stable
innovations (observation minus background) over time, with biases of similar
magnitude to those of heritage MW sounders.<span style>
</span>The current observational system has good data coverage in space and
time from IR/MW sounders; thus a forecast metric such as 500 hPa anomaly
correlation against self-analysis does not show significant impact from the
addition of ATMS assimilation.<span style>
</span>However, the examination of adjoint-based observation impact <a name="_GoBack"></a>using a 24-hour global moist total energy error norm shows
consistent positive impact from ATMS with very similar observation impact as
seen in AMSU-A.</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:10.0pt;font-family:"Arial","sans-serif"">Video:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> 1.</span><span style="font-size:10.0pt"> </span><span style="font-size:10.0pt;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><span style="font-size:10.0pt">
and click on the seminar title</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><br>
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></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><span style="font-size:10.0pt">If you would like to present a seminar contact </span><a href="mailto:George.Ohring@noaa.gov"><span style="font-size:10.0pt">George.Ohring@noaa.gov</span></a><span style="font-size:10.0pt"></span></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b style><span style="font-size:14.0pt">Seminar Files</span></b></p>
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<p class="MsoNormal" style><span style="font-size:10.0pt">Slides available prior to, and audio recording after, the
presentation at </span><a href="http://www.jcsda.noaa.gov/JCSDASeminars.php"><span style="font-size:10.0pt">http://www.jcsda.noaa.gov/JCSDASeminars.php</span></a><span style="font-size:10.0pt"></span></p>
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