<div dir="ltr"><div><div>All:<br><br></div>Please let me know by COB today if you are interested and if you would like to attend. Please note that visitor's entry to NASA GSFC is limited to US Citizens.<br><br></div>Thanks, Avichal.<br><div><div><div><div class="gmail_quote"><div dir="auto"><blockquote type="cite"><div><div class="m_-2758751255704612284WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt"> </span></p>
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<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">"Nalborczyk, Lisa Ann. (GSFC-612.0)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <<a href="mailto:lisa.a.nalborczyk@nasa.gov" target="_blank">lisa.a.nalborczyk@nasa.gov</a>><br>
<b>Date: </b>Thursday, February 1, 2018 at 3:02 PM<br>
<b>To: </b>"<a href="mailto:610_all@nccs.nasa.gov" target="_blank">610_all@nccs.nasa.gov</a>" <<a href="mailto:610_all@nccs.nasa.gov" target="_blank">610_all@nccs.nasa.gov</a>>, "<a href="mailto:690_all@nccs.nasa.gov" target="_blank">690_all@nccs.nasa.gov</a>" <<a href="mailto:690_all@nccs.nasa.gov" target="_blank">690_all@nccs.nasa.gov</a>><br>
<b>Subject: </b>[610_all] 610 Atmospheres Monthly Seminar, Dr. Robert Rogers, NOAA/AOML Hurricane Research Division, THURSDAY, February 15, 2018</span></p>
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<p class="MsoNormal" style="text-align:center" align="center"><a name="m_-2758751255704612284__MailOriginalBody"><b><i><span style="font-size:14.0pt">610 ATMOSPHERES SEMINAR</span></i></b></a></p>
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<p class="MsoNormal"><span><b><i><span style="font-size:14.0pt">SPEAKER:
</span></i></b></span><span><b><span style="font-size:14.0pt">Dr. Robert Rogers</span></b></span></p>
<p class="MsoNormal" style="margin-left:1.0in;text-indent:.5in"><span><b><span style="font-size:14.0pt">NOAA/AOML’s Hurricane Research Division (HRD) in Miami, FL</span></b></span></p>
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<p class="MsoNormal"><span><b><i><span style="font-size:14.0pt">HOST:</span></i></b></span><span><b><span style="font-size:14.0pt">
<span style="color:red">If you would like to meet with Dr. Rogers, please contact Gerald Heymsfield</span>: (</span></b></span><a href="mailto:Luke.D.Oman@nasa.gov" target="_blank"><span><b><span style="font-size:14.0pt">gerald.m.<wbr>heymsfield@nasa.gov</span></b></span><span></span></a><span><b><span style="font-size:14.0pt">)</span></b></span></p>
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<p class="MsoNormal"><span><b><i><span style="font-size:14.0pt">TIME: </span></i></b></span><span><b><span style="font-size:14.0pt"><wbr>3:30 P.M.</span></b></span></p>
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<p class="MsoNormal"><span><b><i><span style="font-size:14.0pt">DATE:
</span></i></b></span><span><b><span style="font-size:14.0pt;color:red">Thursday, February 15, 2018</span></b></span></p>
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<p class="MsoNormal"><span><b><i><span style="font-size:14.0pt">PLACE: </span></i></b></span><span><b><span style="font-size:14.0pt">Building 33, Room H114</span></b></span></p>
<p class="MsoNormal"><span><b><span style="font-size:14.0pt">______________________________<wbr>______________________________<wbr>_______________</span></b></span></p>
<p class="MsoNormal" style="text-align:center" align="center"><span><b><u><span style="font-size:16.0pt;color:red">The relationship between tropical cyclone structure and intensification in moderate vertical shear</span></u></b></span></p>
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<p class="MsoNormal" style="text-indent:.5in"><span><span style="font-size:14.0pt">It has long been known that tropical cyclone (TC) structure and intensity change are highly sensitive to environmental vertical wind shear.
A low value of vertical wind shear (i.e., < 5 m s<sup>-1</sup> between 850 and 200 hPa) is considered a favorable environment for intensification, while high vertical wind shear (>10 m s<sup>-1</sup>) is generally detrimental to intensification. However,
there is a range of moderate shear values, between 5-10 m s<sup>-1</sup>, where the response of the TC is uncertain, and it is in this range of shear values where significant forecast uncertainty lies. Whether or not a TC intensifies in this shear environment
is dependent on characteristics of the environment as well as the TC vortex. </span>
</span></p>
<p class="MsoNormal" style="text-indent:.5in"><span><span style="font-size:14.0pt">One aspect of the vortex structure that has received considerable attention recently is precipitation structure, and how that structure
varies azimuthally in a shear-relative framework. Recent aircraft, satellite, and modeling-based studies have identified different modes of precipitation (e.g., deep vs. shallow convection, stratiform precipitation) and linked these modes to the potential
for TC intensification. In general, intensification has been associated with a greater azimuthal coverage of precipitation, with the distribution of precipitation, including deep convection, on the upshear side of a TC being identified as a critical determinant
of TC intensification. Relationships between the azimuthal distribution of precipitation and TC intensification have invoked efficiency concepts; namely, a greater azimuthal symmetry of precipitation provides a larger projection of diabatic heating onto wavenumber-0,
a configuration more efficient for vortex spin-up. </span></span></p>
<p class="MsoNormal" style="text-indent:.5in"><span><span style="font-size:14.0pt">This study will present results from recent and ongoing case studies and composite analyses of NOAA airborne Doppler radar and dropsonde
data to identify shear-relative vortex structures and how they relate to TC intensification. Attention will be focused on the upshear precipitation distribution and structure, with processes that encourage (or discourage) an enhancement of upshear precipitation
being a primary emphasis. Such processes include moistening in the midlevels, surface enthalpy fluxes, variations in the structure of precipitation upshear, and a reduction in vortex tilt. These results suggest a complex interplay between precipitation and
vortex structure and TC intensification, with processes that provide a more favorable local environment for the maintenance of convection upshear being an important player.</span></span></p>
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<p class="MsoNormal"><span><b><span style="font-size:14.0pt;color:black">SHORT BIO:</span></b></span></p>
<p class="MsoNormal"><span><span style="font-size:14.0pt;color:black">Dr. Rogers is an employee of NOAA/AOML’s Hurricane Research Division (HRD) in Miami, FL. His main areas of research involve studying the role of convective-
and vortex-scale processes in tropical cyclone structure and intensity change, using a combination of aircraft observations and numerical models. He is an active participant in HRD's annual hurricane field campaign, having served as Director of the field
campaign in 2005, 2010, 2015, and 2016.</span></span></p>
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<p class="MsoNormal"><span><span style="font-size:9.0pt;color:black"> </span></span></p>
<p class="MsoNormal"><span><span style="font-size:9.0pt;font-family:"Comic Sans MS";color:navy">Lisa A. Nalborczyk<br>
GPM Mission Science Support Specialist</span></span></p>
<p class="MsoNormal"><span><span style="font-size:9.0pt;font-family:"Comic Sans MS";color:navy">612 Lab Admin/Property Custodian</span></span></p>
<p class="MsoNormal"><span><span style="font-size:9.0pt;font-family:"Comic Sans MS";color:navy">Mesoscale Atmospheric Processes Lab<br>
Science Systems & Applications, Inc.<br>
NASA Goddard Space Flight Center<br>
Mail Code 612<br>
Building 33, Room C411<br>
Greenbelt, MD 20771<br>
</span></span><a href="http://lisa.a.nalborczyk@nasa.gov" target="_blank"><span><span style="font-size:9.0pt;font-family:"Comic Sans MS";color:blue">lisa.a.nalborczyk@nasa.gov</span></span><span></span></a><span><span style="font-size:9.0pt;font-family:"Comic Sans MS";color:navy"><br>
<a href="tel:(301)%20614-5087" value="+13016145087" target="_blank">(301) 614-5087</a><br>
FAX: <a href="tel:(301)%20286-1626" value="+13012861626" target="_blank">(301) 286-1626</a><span class="HOEnZb"><font color="#888888"><br>
</font></span></span></span><span class="HOEnZb"><font color="#888888"><span><span style="font-size:11.0pt;color:black">--
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</div><br><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div> Dr. Avichal Mehra <a href="mailto:Avichal.Mehra@noaa.gov" target="_blank">Avichal.Mehra@noaa.gov</a><br></div><div> Lead Physical Scientist NOAA/NWS/NCEP/EMC<br> 5830 University Research Court Room 2104
<br> College Park Ph. 301-683-3746<br> MD 20740 Fax: 301-683-3703</div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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