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<p class="HTMLBody" align="center" style="text-align:center;line-height:115%"><b><u><span style="font-size:26.0pt;line-height:115%;font-family:"Monotype Corsiva"">Meteorology Seminar<o:p></o:p></span></u></b></p>
<p class="HTMLBody" align="center" style="text-align:center;line-height:115%"><b><span style="font-size:28.0pt;line-height:115%;font-family:"Monotype Corsiva"">Evan Jones</span></b><span style="font-size:28.0pt;line-height:115%;font-family:"Monotype Corsiva""><o:p></o:p></span></p>
<p class="HTMLBody" align="center" style="text-align:center"><span style="font-size:28.0pt;font-family:"Monotype Corsiva"">M.S. Meteorology Candidate<o:p></o:p></span></p>
<p class="HTMLBody"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="doublespacedcaps" align="left" style="text-align:left;line-height:normal">
<b><u><span style="font-size:14.0pt">Title</span></u>:</b> REPRESENTATION OF TROPICAL CYCLONE PRECIPITATION IN GLOBAL REANALYSIS DATASETS<span style="font-size:14.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><u><span style="font-size:14.0pt">Major Professor</span></u></b><b><span style="font-size:14.0pt">: Dr. Allison Wing and Dr. Rhys Parfitt</span></b><b><u><span style="font-size:14.0pt;font-family:Times"><o:p></o:p></span></u></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><u><span style="font-size:14.0pt">Date</span></u></b><b><span style="font-size:14.0pt">:</span></b><span style="font-size:14.0pt"> Monday, June 29, 2020
<b><u>Time</u>: 3:00 PM</b></span><span style="font-size:14.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="HTMLBody"><b><span style="font-size:12.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><u>Location</u>: </b>Zoom Meeting URL: <span style="color:black">
https://fsu.zoom.us/j/93373177597</span><span style="font-size:12.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b>ABSTRACT<o:p></o:p></b></p>
<p class="MsoNormal"><span style="color:black">Each year, tropical cyclones (TCs) impact communities around the world by producing rainfall with devastating damage, loss of life and can contribute a non-trivial amount to climatological annual mean rainfall.
The representation of TC precipitation in datasets such as reanalyses is thus crucial for both forecasting purposes and climate projections. This study quantifies the spread in TC precipitation across eight different reanalysis datasets: CFSR, ERA-20C, ERA-40,
ERA5, ERA-Interim, JRA-55, MERRA-2 and NOAA-20C. TC precipitation is assigned using two TC tracking methods, manual tracking and objective tracking, via a fixed radius.<span class="apple-converted-space"> </span><br>
<br>
Climatological TC precipitation and TC precipitation fraction assigned using TempestExtremes is generally lower than that assigned using IBTrACS, owing to the fewer number of TCs tracked in TempestExtremes and position differences between the best-track and
reanalyses, as well as the underestimation of reanalysis TC intensity. Both methods capture the same general spatial patterns of TC precipitation and TC precipitation fraction globally. Compared to TRMM, assignment from both methods provides less annual average
TC precipitation and TC precipitation fraction over most areas, with the exception of land and some ocean basins. In most basins, with the exception of the West Pacific (WPAC), and most reanalyses, with the exception of MERRA-2, the systematic bias toward
IBTrACS-derived TC precipitation is greatly minimized by considering TC precipitation normalized by TC density.<span class="apple-converted-space"> </span><br>
<br>
The relative spread across reanalyses in TC precipitation is larger for TC precipitation derived from TempestExtremes than from IBTrACS, where the East Pacific (EPAC) has a higher relative spread than the WPAC with both tracking methods. Partitioning by Saffir-Simpson
best-track intensity, the largest relative spread across reanalyses in TC precipitation is from TCs of major hurricane strength. A comparison of IBTrACS-derived extratropical phase TC precipitation in the North Atlantic shows that there is a large relative
spread across the reanalyses, likely a limitation of the fixed radius method when assigning extratropical phase precipitation. Finally, a comparison of mean precipitation rate in TCs as a function of reanalysis MSLP shows that the spread across reanalyses
is larger for higher intensity TCs, but that the inability of reanalyses to properly represent highest intensity and very weak TCs also contributes. Overall, TC precipitation in reanalyses is not only a function of their resolution or any TC pre-processing
that is done, but also how it assimilates data, parameterizes complex processes, and configures model physics.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="mso-ligatures:standard;mso-contextual-alternates:yes"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Shel McGuire<o:p></o:p></p>
<p class="MsoNormal">Florida State University<o:p></o:p></p>
<p class="MsoNormal">Academic Program Specialist<o:p></o:p></p>
<p class="MsoNormal">Department of Earth, Ocean, & Atmospheric Science<o:p></o:p></p>
<p class="MsoNormal">1011 Academic Way, 2019 EOA Building<o:p></o:p></p>
<p class="MsoNormal">Tallahassee, FL 32306<o:p></o:p></p>
<p class="MsoNormal">850-644-8582<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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