<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
color:windowtext;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman",serif;
color:black;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman",serif;
color:black;}
span.EmailStyle19
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p><b>Honor's in the Major Seminar</b><o:p></o:p></p>
<p><b>Speaker:</b> Hanna Brasseur<o:p></o:p></p>
<p><b>Professor</b>: Jon Ahlquist<o:p></o:p></p>
<p><b>Title:</b> Disturbances Propagating into the Indian Summer Monsoon: An Observational Study<o:p></o:p></p>
<p><b>Time:</b> 3:30 PM, 30 March 2021<o:p></o:p></p>
<p><b>Zoom Meeting:</b> <a href="https://fsu.zoom.us/j/92194168456?pwd=WmgrVkdOQW9OZlZGeWpIVFN5ZnVrQT09">
https://fsu.zoom.us/j/92194168456?pwd=WmgrVkdOQW9OZlZGeWpIVFN5ZnVrQT09</a><o:p></o:p></p>
<p><b>Abstract: </b> This project studied disturbances propagating over the head of the Bay of Bengal (90°E, 20°N), where there are frequent storms during the Indian summer monsoon. Weather data came from the four-times daily global grids in the JRA-55 Japanese
Reanalyses. We removed the diurnally-varying annual cycle based on 1 January 1958 through 31 December 2018. Then we identified the 100 largest relative vorticity events at (90°E, 20°N) during the 90-day period 1 June to 29 August for 1958–2018. Events had
to be independent in the sense that no two events could occur within a week of each other. Centered around these vorticity maxima, we computed 4-times/day composites beginning 10 days before the maximum and extending to 10 days after the maximum. Time is indexed
so that the vorticity maximum at (90°E, 20°N) occurs at t=0. With composites based on vorticity maxima at 850 hPa (approximately z=1.5km), incoming events could be identified at t = -5 days lingering off the coast of Southeast Asia. After a couple days there,
the composite broke up when crossing Southeast Asia. This could either be just what it seems, or individual events could move at different speeds so that the composite lost coherency. Over the Bay of Bengal, disturbances lingered again before moving northwest
and dissipating over northern India. Composites of the height of pressure surfaces based on the times of vorticity maxima showed low heights, analogous to low pressure, corresponding to vorticity maxima. Composites of upper-tropospheric height and 850-250
hPa thickness reveal mid-latitude connections that are not apparent at 850 hPa.<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">To make an appointment please login to my.fsu.edu and choose the Campus Connect (CC) icon<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>