<div dir="ltr"><div class="gmail_default" style="font-size:small">FYI</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">---------- Forwarded message ---------<br>From: <strong class="gmail_sendername" dir="auto">Andrew Winters</strong> <span dir="auto"><<a href="mailto:andrew.c.winters@colorado.edu">andrew.c.winters@colorado.edu</a>></span><br>Date: Thu, Sep 28, 2023 at 7:22 AM<br>Subject: Re: ATOC Colloquium: Friday, September 29 @ 11am – Dr. Pragallva Barpanda – SEEC S228 and Zoom<br>To: <a href="mailto:atoc-faculty@colorado.edu">atoc-faculty@colorado.edu</a> <<a href="mailto:atoc-faculty@colorado.edu">atoc-faculty@colorado.edu</a>>, <a href="mailto:atoc-researchers@colorado.edu">atoc-researchers@colorado.edu</a> <<a href="mailto:atoc-researchers@colorado.edu">atoc-researchers@colorado.edu</a>>, ATOC Graduate Students <<a href="mailto:atoc-students@colorado.edu">atoc-students@colorado.edu</a>>, <a href="mailto:atoc-majors@colorado.edu">atoc-majors@colorado.edu</a> <<a href="mailto:atoc-majors@colorado.edu">atoc-majors@colorado.edu</a>>, <a href="mailto:atoc-minors@colorado.edu">atoc-minors@colorado.edu</a> <<a href="mailto:atoc-minors@colorado.edu">atoc-minors@colorado.edu</a>>, <a href="mailto:atoc-colloquium@colorado.edu">atoc-colloquium@colorado.edu</a> <<a href="mailto:atoc-colloquium@colorado.edu">atoc-colloquium@colorado.edu</a>><br>Cc: <a href="mailto:Pragallva.Barpanda@uib.no">Pragallva.Barpanda@uib.no</a> <<a href="mailto:Pragallva.Barpanda@uib.no">Pragallva.Barpanda@uib.no</a>>, <a href="mailto:pragallva.noaa@gmail.com">pragallva.noaa@gmail.com</a> <<a href="mailto:pragallva.noaa@gmail.com">pragallva.noaa@gmail.com</a>><br></div><br><br><div class="msg-8069215756749329468">
<div dir="ltr">
<div style="font-family:"Calibri Light","Helvetica Light",sans-serif;font-size:12pt;color:rgb(0,0,0)">
<span style="font-size:12pt;margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,255)"><span style="margin:0px;color:black;background-color:rgb(255,255,255)"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="font-size:15px;margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="font-size:12pt;margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px">Hi
everyone,<br>
</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
<div style="font-size:12pt;margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,255)">
<div style="margin:0px;color:black;background-color:rgb(255,255,255)">
<div style="margin:0px;background-color:white">
<span style="margin:0px;background-color:white"></span>
<div style="margin:0px;background-color:white">
<span style="margin:0px;background-color:white"></span>
<div style="font-size:15px;margin:0px;background-color:white">
<span style="font-size:12pt;margin:0px;background-color:white"><span style="margin:0px;background-color:white"></span>
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<span style="margin:0px;background-color:white"></span>
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<span style="margin:0px;background-color:white"></span>
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px"><br>
</div>
<div style="margin:0px">A reminder that the next <span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">ATOC</span></span></span></span></span> <span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">Colloquium</span><span style="margin:0px"> </span></span></span></span></span></span></span>will
be held in a hybrid format on<span style="margin:0px"> </span><b>Friday, September 29 from 11a–12p MT over Zoom and in SEEC S228.<span style="margin:0px"> </span></b>This
week's <span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">colloquium</span></span></span></span> will
feature<span style="margin:0px"> a seminar from<span style="margin:0px"> </span><b>Dr. Pragallva
Barpanda (Univ. of Bergen)</b><span style="margin:0px"> </span>entitled,<span style="margin:0px"> </span><i>"The
role of subtropical Rossby waves in amplifying the divergent circulation of the Madden Julian Oscillation (MJO)</i></span><span style="margin:0px;background-color:white">". The zoom
login information and an abstract for the </span><span style="margin:0px;background-color:white"><span style="margin:0px">colloquium</span></span><span style="margin:0px;background-color:white"> are
provided below. Please join us for conversation beginning at 10:45am MT, and stay afterwards for a lunch catered by Illegal Pete's.</span></div>
<div style="margin:0px"><b><b><b></b></b></b></div>
<div style="margin:0px">We look forward to seeing you on Friday!<br>
</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">-The<span style="margin:0px"> </span><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">ATOC</span></span></span></span></span></span><span style="margin:0px"> </span><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">Colloquium</span></span></span></span></span></span></span></span></span><span style="margin:0px"> </span>Committee</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">
<div style="margin:0px;background-color:white">
<span style="margin:0px">_________________________________________________</span>
<div style="margin:0px"><br>
</div>
<div style="margin:0px"><b></b></div>
</div>
<div style="margin:0px;background-color:white">
<b>The role of subtropical Rossby waves in amplifying the divergent circulation of the Madden Julian Oscillation (MJO)<br>
</b></div>
<div style="margin:0px;background-color:white">
<div style="margin:0px"><span style="margin:0px">Pragallva Barpanda (Univ. of Bergen)<br>
</span></div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px"></div>
</div>
The composite structure of the MJO has long been known to feature pronounced Rossby gyres in the subtropical upper troposphere. However, it is not known whether these subtropical gyre circulations have any subsequent effects on the MJO convective outflow. In
my talk, I will disentangle the feedback mechanism from subtropics-to-tropics using idealized model experiments. In particular, I use a nonlinear spherical shallow water model with different imposed background jet profiles and an assumed MJO-like thermal heat
source. Results show that a stronger subtropical jet leads to a stronger Kelvin-mode response in the tropics, together with stronger divergent anomalies in the vicinity of the forcing. To understand this behavior, additional calculations are performed in which
a localized vorticity forcing is imposed in the extratropics, without any thermal forcing in the tropics. The response is once again seen to include pronounced equatorial Kelvin-mode response, provided the jet is of sufficient amplitude. A detailed analysis
of the vorticity budget reveals that the zonal-mean zonal wind shear plays a key role in amplifying the Kelvin-mode divergent winds near the equator. These results help to explain why the MJO tends to be strongest during boreal winter when the Indo-Pacific
jet is typically at its strongest.<br>
<br>
<div style="margin:0px;background-color:white">
<span style="margin:0px"><span style="margin:0px"><span style="margin:0px">__________________________________________________</span></span></span></div>
<div style="margin:0px;background-color:white">
<span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><br>
</span></span></span></div>
<div style="margin:0px;background-color:white">
<u>Zoom login Information:</u></div>
<div style="margin:0px;background-color:white">
<br>
</div>
<div style="margin:0px;background-color:white">
<b></b></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</span></div>
</div>
</div>
<b>Topic: ATOC Colloquium</b>
<div style="margin:0px"><b>Time: Sep 29, 2023 11:00 AM Mountain Time (US and Canada)</b></div>
<div style="margin:0px"><b><br>
</b></div>
<div style="margin:0px"><b><a href="https://cuboulder.zoom.us/j/98582201579" rel="noopener noreferrer" id="m_-8069215756749329468OWA466beb7b-f2cf-d397-daa4-2540479f43db" style="margin:0px" target="_blank">https://cuboulder.zoom.us/j/98582201579</a>
<div id="m_-8069215756749329468LPBorder_GTaHR0cHM6Ly9jdWJvdWxkZXIuem9vbS51cy9qLzk4NTgyMjAxNTc5" style="margin:16px 0px;max-width:800px;min-width:424px">
<table id="m_-8069215756749329468LPContainer149218" style="padding:12px;width:424px;border-width:1px;border-style:solid;border-color:rgb(200,200,200);border-radius:2px">
<tbody>
<tr valign="top" style="border-spacing:0px">
<td style="width:392px">
<div id="m_-8069215756749329468LPTitle149218" style="font-weight:300;font-size:21px;font-family:wf_segoe-ui_light,"Segoe UI Light","Segoe WP Light","Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin:0px 8px 12px 0px">
<a id="m_-8069215756749329468LPUrlAnchor149218" href="https://cuboulder.zoom.us/j/98582201579" style="margin:0px;text-decoration:none" target="_blank">Join our Cloud HD Video Meeting</a></div>
<div id="m_-8069215756749329468LPDescription149218" style="font-size:14px;font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin:0px 8px 12px 0px;max-height:100px;overflow:hidden;color:rgb(102,102,102)">
Zoom is the leader in modern enterprise video communications, with an easy, reliable cloud platform for video and audio conferencing, chat, and webinars across mobile, desktop, and room systems. Zoom Rooms is the original software-based conference room solution
used around the world in board, conference, huddle, and training rooms, as well as executive offices and classrooms. Founded in 2011, Zoom helps businesses and organizations bring their teams together in a frictionless environment to get more done. Zoom is
a publicly traded company headquartered in San Jose, CA.</div>
<div id="m_-8069215756749329468LPMetadata149218" style="font-weight:400;font-size:14px;font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin:0px;color:rgb(166,166,166)">
<a href="http://cuboulder.zoom.us" target="_blank">cuboulder.zoom.us</a></div>
</td>
</tr>
</tbody>
</table>
</div>
</b></div>
<div style="margin:0px"></div>
<div style="margin:0px"><b><span style="margin:0px">Meeting ID: 985 8220 1579</span></b><br>
</div>
<div style="margin:0px"><b>Passcode: ATOC</b></div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">One tap mobile</div>
<div style="margin:0px">+17193594580,,98582201579# US</div>
<div style="margin:0px">+12532158782,,98582201579# US (Tacoma)</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">Dial by your location</div>
<div style="margin:0px">• +1 719 359 4580 US</div>
<div style="margin:0px">• +1 253 215 8782 US (Tacoma)</div>
<div style="margin:0px">• +1 346 248 7799 US (Houston)</div>
<div style="margin:0px">• +1 669 444 9171 US</div>
<div style="margin:0px">• +1 669 900 6833 US (San Jose)</div>
<div style="margin:0px">• +1 253 205 0468 US</div>
<div style="margin:0px">• +1 564 217 2000 US</div>
<div style="margin:0px">• +1 646 558 8656 US (New York)</div>
<div style="margin:0px">• +1 646 931 3860 US</div>
<div style="margin:0px">• +1 689 278 1000 US</div>
<div style="margin:0px">• +1 301 715 8592 US (Washington DC)</div>
<div style="margin:0px">• +1 305 224 1968 US</div>
<div style="margin:0px">• +1 309 205 3325 US</div>
<div style="margin:0px">• +1 312 626 6799 US (Chicago)</div>
<div style="margin:0px">• +1 360 209 5623 US</div>
<div style="margin:0px">• +1 386 347 5053 US</div>
<div style="margin:0px">• +1 507 473 4847 US</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">Join by SIP</div>
<div style="margin:0px">• <a href="mailto:98582201579@zoomcrc.com" target="_blank">98582201579@zoomcrc.com</a></div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">Join by H.323</div>
<div style="margin:0px">• 162.255.37.11 (US West)</div>
<div style="margin:0px">• 162.255.36.11 (US East)</div>
<div style="margin:0px">• 115.114.131.7 (India Mumbai)</div>
<div style="margin:0px">• 115.114.115.7 (India Hyderabad)</div>
<div style="margin:0px">• 213.19.144.110 (Amsterdam Netherlands)</div>
<div style="margin:0px">• 213.244.140.110 (Germany)</div>
<div style="margin:0px">• 103.122.166.55 (Australia Sydney)</div>
<div style="margin:0px">• 103.122.167.55 (Australia Melbourne)</div>
<div style="margin:0px">• 149.137.40.110 (Singapore)</div>
<div style="margin:0px">• 64.211.144.160 (Brazil)</div>
<div style="margin:0px">• 149.137.68.253 (Mexico)</div>
<div style="margin:0px">• 69.174.57.160 (Canada Toronto)</div>
<div style="margin:0px">• 65.39.152.160 (Canada Vancouver)</div>
<div style="margin:0px">• 207.226.132.110 (Japan Tokyo)</div>
<div style="margin:0px">• 149.137.24.110 (Japan Osaka)</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">Meeting ID: 985 8220 1579</div>
Passcode: 166543</div>
</div>
<br>
</div>
<div>
<div style="font-family:"Calibri Light","Helvetica Light",sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div id="m_-8069215756749329468Signature">
<div>
<div style="font-family:"Calibri Light","Helvetica Light",sans-serif;font-size:12pt;color:rgb(0,0,0);background-color:rgb(255,255,255)">
<span style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white"><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">_______________________________________________________</span></span><span style="font-size:15px;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;margin:0px;text-align:start;background-color:white"></span><span style="font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:start;display:inline!important;background-color:rgb(255,255,255)"></span></div>
<div style="font-family:"Calibri Light","Helvetica Light",sans-serif;font-size:12pt;color:rgb(0,0,0);background-color:rgb(255,255,255)">
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px"></span><br>
</div>
<span style="font-size:15px;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;margin:0px;text-align:start;background-color:white"></span><span style="font-size:15px;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;margin:0px;text-align:start;background-color:white"></span><span style="font-size:15px;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;margin:0px;text-align:start;background-color:white"></span><span style="font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:start;display:inline!important;background-color:rgb(255,255,255)"></span>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px"><b>Andrew C. Winters</b></span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">Assistant Professor</span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">Department of Atmospheric and Oceanic Sciences (ATOC)</span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">University of Colorado Boulder</span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">311 UCB</span><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">, Boulder,
CO 80309-0311</span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">Phone: 303-735-5775</span></div>
<span style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white"><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px"></span><a href="https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Facwinters.weebly.com%2F&data=05%7C01%7Catoc-colloquium%40colorado.edu%7Cd5cc360e87cd47d339f408dbc025ef57%7C3ded8b1b070d462982e4c0b019f46057%7C1%7C0%7C638315041399965893%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=7UXbKM4KtYL5eB%2BunVP9bhiMGrkuimO%2B7JwURnFm380%3D&reserved=0" rel="noopener noreferrer" style="margin:0px" target="_blank"><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">https://acwinters.weebly.com</span></a><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px"> ||
@acwinters_wx || he/him/his</span></span><span style="font-size:15px;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;margin:0px;text-align:start;background-color:white"></span><span style="font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:start;display:inline!important;background-color:rgb(255,255,255)"></span>
<div style="font-size:12pt;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<font face="Calibri Light,Helvetica Light,sans-serif"><br>
</font></div>
<div style="font-size:12pt;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,"system-ui",Roboto,"Helvetica Neue",sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<font face="Calibri Light,Helvetica Light,sans-serif"><i><span style="font-family:Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif;margin:0px;outline:0px;color:rgb(17,17,17);background-color:white">CU
Boulder acknowledges that it is located on the traditional territories and ancestral homelands of the Cheyenne, Arapaho, Ute and many other Native American nations. Their forced removal from these territories has caused devastating and lasting impacts.<span style="margin:0px"> </span></span><a href="https://www.colorado.edu/about/land-acknowledgement" rel="noopener noreferrer" style="font-family:Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif;margin:0px;outline:0px;color:rgb(2,119,189);background-color:white" target="_blank">Full
CU Boulder land acknowledgment</a><span style="font-family:Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif;margin:0px;color:rgb(17,17,17);background-color:white"> </span></i></font></div>
<br>
</div>
</div>
</div>
</div>
<div id="m_-8069215756749329468appendonsend"></div>
<hr style="display:inline-block;width:98%">
<div id="m_-8069215756749329468divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Andrew Winters<br>
<b>Sent:</b> Monday, September 25, 2023 8:14 AM<br>
<b>To:</b> <a href="mailto:atoc-faculty@colorado.edu" target="_blank">atoc-faculty@colorado.edu</a> <<a href="mailto:atoc-faculty@colorado.edu" target="_blank">atoc-faculty@colorado.edu</a>>; <a href="mailto:atoc-researchers@colorado.edu" target="_blank">atoc-researchers@colorado.edu</a> <<a href="mailto:atoc-researchers@colorado.edu" target="_blank">atoc-researchers@colorado.edu</a>>; ATOC Graduate Students <<a href="mailto:atoc-students@colorado.edu" target="_blank">atoc-students@colorado.edu</a>>; <a href="mailto:atoc-majors@colorado.edu" target="_blank">atoc-majors@colorado.edu</a> <<a href="mailto:atoc-majors@colorado.edu" target="_blank">atoc-majors@colorado.edu</a>>; <a href="mailto:atoc-minors@colorado.edu" target="_blank">atoc-minors@colorado.edu</a>
<<a href="mailto:atoc-minors@colorado.edu" target="_blank">atoc-minors@colorado.edu</a>>; <a href="mailto:atoc-colloquium@colorado.edu" target="_blank">atoc-colloquium@colorado.edu</a> <<a href="mailto:atoc-colloquium@colorado.edu" target="_blank">atoc-colloquium@colorado.edu</a>><br>
<b>Cc:</b> <a href="mailto:Pragallva.Barpanda@uib.no" target="_blank">Pragallva.Barpanda@uib.no</a> <<a href="mailto:Pragallva.Barpanda@uib.no" target="_blank">Pragallva.Barpanda@uib.no</a>>; <a href="mailto:pragallva.noaa@gmail.com" target="_blank">pragallva.noaa@gmail.com</a> <<a href="mailto:pragallva.noaa@gmail.com" target="_blank">pragallva.noaa@gmail.com</a>><br>
<b>Subject:</b> ATOC Colloquium: Friday, September 29 @ 11am – Dr. Pragallva Barpanda – SEEC S228 and Zoom</font>
<div> </div>
</div>
<div dir="ltr">
<div style="font-family:"Calibri Light","Helvetica Light",sans-serif;font-size:12pt;color:rgb(0,0,0)">
<span style="font-size:12pt;margin:0px;color:black;background-color:rgb(255,255,255)"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="font-size:15px;margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="font-size:12pt;margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px">Hi
everyone,<br>
</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></div>
<div style="font-family:"Calibri Light","Helvetica Light",sans-serif;font-size:12pt;color:rgb(0,0,0)">
<div style="font-size:12pt;margin:0px;color:black;background-color:rgb(255,255,255)">
<div style="margin:0px;background-color:white">
<span style="margin:0px;background-color:white"></span>
<div style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"></span>
<div style="font-size:15px;margin:0px;background-color:white">
<span style="font-size:12pt;margin:0px;background-color:white"><span style="margin:0px;background-color:white"></span>
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"></span>
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"></span>
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px"><br>
</div>
<div style="margin:0px">The next <span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">ATOC</span></span></span></span></span> <span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">Colloquium</span><span style="margin:0px"> </span></span></span></span></span></span></span>will
be held in a hybrid format on<span style="margin:0px"> </span><b>Friday, September 29 from 11a–12p MT over Zoom and in SEEC S228.<span style="margin:0px"> </span></b>This
week's <span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">colloquium</span></span></span></span> will
feature<span style="margin:0px"> a seminar from<span style="margin:0px"> </span><b>Dr. Pragallva Barpanda (Univ. of Bergen)</b><span style="margin:0px"> </span>entitled,<span style="margin:0px"> </span><i>"The
role of subtropical Rossby waves in amplifying the divergent circulation of the Madden Julian Oscillation (MJO)</i></span><span style="margin:0px;background-color:white">". The zoom login information
and an abstract for the </span><span style="margin:0px;background-color:white"><span style="margin:0px">colloquium</span></span><span style="margin:0px;background-color:white"> are
provided below. Please join us for conversation beginning at 10:45am MT, and stay afterwards for a lunch catered by Illegal Pete's.</span></div>
<div style="margin:0px"><b><b><b></b></b></b></div>
<div style="margin:0px">We look forward to seeing you on Friday!<br>
</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">-The<span style="margin:0px"> </span><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">ATOC</span></span></span></span></span></span><span style="margin:0px"> </span><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">Colloquium</span></span></span></span></span></span></span></span></span><span style="margin:0px"> </span>Committee</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">
<div style="margin:0px;background-color:white"><span style="margin:0px">_________________________________________________</span>
<div style="margin:0px"><br>
</div>
<div style="margin:0px"><b></b></div>
</div>
<div style="margin:0px;background-color:white"><b>The role of subtropical Rossby waves in amplifying the divergent circulation of the Madden Julian Oscillation (MJO)<br>
</b></div>
<div style="margin:0px;background-color:white">
<div style="margin:0px"><span style="margin:0px">Pragallva Barpanda (Univ. of Bergen)<br>
</span></div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px"></div>
</div>
The composite structure of the MJO has long been known to feature pronounced Rossby gyres in the subtropical upper troposphere. However, it is not known whether these subtropical gyre circulations have any subsequent effects on the MJO convective outflow. In
my talk, I will disentangle the feedback mechanism from subtropics-to-tropics using idealized model experiments. In particular, I use a nonlinear spherical shallow water model with different imposed background jet profiles and an assumed MJO-like thermal heat
source. Results show that a stronger subtropical jet leads to a stronger Kelvin-mode response in the tropics, together with stronger divergent anomalies in the vicinity of the forcing. To understand this behavior, additional calculations are performed in which
a localized vorticity forcing is imposed in the extratropics, without any thermal forcing in the tropics. The response is once again seen to include pronounced equatorial Kelvin-mode response, provided the jet is of sufficient amplitude. A detailed analysis
of the vorticity budget reveals that the zonal-mean zonal wind shear plays a key role in amplifying the Kelvin-mode divergent winds near the equator. These results help to explain why the MJO tends to be strongest during boreal winter when the Indo-Pacific
jet is typically at its strongest.<br>
<br>
<div style="margin:0px;background-color:white"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px">__________________________________________________</span></span></span></div>
<div style="margin:0px;background-color:white"><span style="margin:0px"><span style="margin:0px"><span style="margin:0px"><br>
</span></span></span></div>
<div style="margin:0px;background-color:white"><u>Zoom login Information:</u></div>
<div style="margin:0px;background-color:white"><br>
</div>
<div style="margin:0px;background-color:white"><b></b></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</span></div>
</div>
</div>
<b>Topic: ATOC Colloquium</b>
<div style="margin:0px"><b>Time: Sep 29, 2023 11:00 AM Mountain Time (US and Canada)</b></div>
<div style="margin:0px"><b><br>
</b></div>
<div style="margin:0px"><b><a href="https://cuboulder.zoom.us/j/98582201579" id="m_-8069215756749329468OWA2493e654-04a8-30e1-5514-063138e903d9" style="margin:0px" target="_blank">https://cuboulder.zoom.us/j/98582201579</a></b></div>
<div style="margin:0px"></div>
<div style="margin:0px"><b><span style="margin:0px">Meeting ID: 985 8220 1579</span></b><br>
</div>
<div style="margin:0px"><b>Passcode: ATOC</b></div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">One tap mobile</div>
<div style="margin:0px">+17193594580,,98582201579# US</div>
<div style="margin:0px">+12532158782,,98582201579# US (Tacoma)</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">Dial by your location</div>
<div style="margin:0px">• +1 719 359 4580 US</div>
<div style="margin:0px">• +1 253 215 8782 US (Tacoma)</div>
<div style="margin:0px">• +1 346 248 7799 US (Houston)</div>
<div style="margin:0px">• +1 669 444 9171 US</div>
<div style="margin:0px">• +1 669 900 6833 US (San Jose)</div>
<div style="margin:0px">• +1 253 205 0468 US</div>
<div style="margin:0px">• +1 564 217 2000 US</div>
<div style="margin:0px">• +1 646 558 8656 US (New York)</div>
<div style="margin:0px">• +1 646 931 3860 US</div>
<div style="margin:0px">• +1 689 278 1000 US</div>
<div style="margin:0px">• +1 301 715 8592 US (Washington DC)</div>
<div style="margin:0px">• +1 305 224 1968 US</div>
<div style="margin:0px">• +1 309 205 3325 US</div>
<div style="margin:0px">• +1 312 626 6799 US (Chicago)</div>
<div style="margin:0px">• +1 360 209 5623 US</div>
<div style="margin:0px">• +1 386 347 5053 US</div>
<div style="margin:0px">• +1 507 473 4847 US</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">Join by SIP</div>
<div style="margin:0px">• <a href="mailto:98582201579@zoomcrc.com" target="_blank">98582201579@zoomcrc.com</a></div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">Join by H.323</div>
<div style="margin:0px">• 162.255.37.11 (US West)</div>
<div style="margin:0px">• 162.255.36.11 (US East)</div>
<div style="margin:0px">• 115.114.131.7 (India Mumbai)</div>
<div style="margin:0px">• 115.114.115.7 (India Hyderabad)</div>
<div style="margin:0px">• 213.19.144.110 (Amsterdam Netherlands)</div>
<div style="margin:0px">• 213.244.140.110 (Germany)</div>
<div style="margin:0px">• 103.122.166.55 (Australia Sydney)</div>
<div style="margin:0px">• 103.122.167.55 (Australia Melbourne)</div>
<div style="margin:0px">• 149.137.40.110 (Singapore)</div>
<div style="margin:0px">• 64.211.144.160 (Brazil)</div>
<div style="margin:0px">• 149.137.68.253 (Mexico)</div>
<div style="margin:0px">• 69.174.57.160 (Canada Toronto)</div>
<div style="margin:0px">• 65.39.152.160 (Canada Vancouver)</div>
<div style="margin:0px">• 207.226.132.110 (Japan Tokyo)</div>
<div style="margin:0px">• 149.137.24.110 (Japan Osaka)</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">Meeting ID: 985 8220 1579</div>
Passcode: 166543</div>
<br>
</div>
<div>
<div style="font-family:"Calibri Light","Helvetica Light",sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div id="m_-8069215756749329468x_Signature">
<div>
<div style="font-family:"Calibri Light","Helvetica Light",sans-serif;font-size:12pt;color:rgb(0,0,0);background-color:rgb(255,255,255)">
<span style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white"><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">_______________________________________________________</span></span><span style="font-size:15px;margin:0px;text-align:start;background-color:white"></span><span style="font-size:15px;text-align:start;display:inline!important;background-color:rgb(255,255,255)"></span></div>
<div style="font-family:"Calibri Light","Helvetica Light",sans-serif;font-size:12pt;color:rgb(0,0,0);background-color:rgb(255,255,255)">
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px"></span><br>
</div>
<span style="font-size:15px;margin:0px;text-align:start;background-color:white"></span><span style="font-size:15px;margin:0px;text-align:start;background-color:white"></span><span style="font-size:15px;margin:0px;text-align:start;background-color:white"></span><span style="font-size:15px;text-align:start;display:inline!important;background-color:rgb(255,255,255)"></span>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px"><b>Andrew C. Winters</b></span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">Assistant Professor</span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">Department of Atmospheric and Oceanic Sciences (ATOC)</span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">University of Colorado Boulder</span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">311 UCB</span><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">, Boulder,
CO 80309-0311</span></div>
<div style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">Phone: 303-735-5775</span></div>
<span style="font-size:12pt;font-family:Calibri,Arial,Helvetica,sans-serif;margin:0px;text-align:start;color:black;background-color:white"><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px"></span><a href="https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Facwinters.weebly.com%2F&data=05%7C01%7Catoc-colloquium%40colorado.edu%7Cd5cc360e87cd47d339f408dbc025ef57%7C3ded8b1b070d462982e4c0b019f46057%7C1%7C0%7C638315041399965893%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=7UXbKM4KtYL5eB%2BunVP9bhiMGrkuimO%2B7JwURnFm380%3D&reserved=0" id="m_-8069215756749329468OWA9f963ede-35ca-691a-e5d9-45b693eec186" style="margin:0px" target="_blank"><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px">https://acwinters.weebly.com</span></a><span style="font-family:"Calibri Light","Helvetica Light",sans-serif;margin:0px"> ||
@acwinters_wx || he/him/his</span></span><span style="font-size:15px;margin:0px;text-align:start;background-color:white"></span><span style="font-size:15px;text-align:start;display:inline!important;background-color:rgb(255,255,255)"></span>
<div style="font-size:12pt;margin:0px;text-align:start;color:black;background-color:white">
<font face="Calibri Light,Helvetica Light,sans-serif"><br>
</font></div>
<div style="font-size:12pt;margin:0px;text-align:start;color:black;background-color:white">
<font face="Calibri Light,Helvetica Light,sans-serif"><i><span style="font-family:Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif;margin:0px;outline:0px;color:rgb(17,17,17);background-color:white">CU
Boulder acknowledges that it is located on the traditional territories and ancestral homelands of the Cheyenne, Arapaho, Ute and many other Native American nations. Their forced removal from these territories has caused devastating and lasting impacts.<span style="margin:0px"> </span></span><a href="https://www.colorado.edu/about/land-acknowledgement" id="m_-8069215756749329468OWA378ed620-bd0f-463a-241d-89b3161a9e58" style="font-family:Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif;margin:0px;outline:0px;color:rgb(2,119,189);background-color:white" target="_blank">Full
CU Boulder land acknowledgment</a><span style="font-family:Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif;margin:0px;color:rgb(17,17,17);background-color:white"> </span></i></font></div>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
<p></p>
-- <br>
You received this message because you are subscribed to the Google Groups "atoc-colloquium" group.<br>
To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:atoc-colloquium+unsubscribe@colorado.edu" target="_blank">atoc-colloquium+unsubscribe@colorado.edu</a>.<br>
</div></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span style="font-family:arial,sans-serif;color:rgb(0,0,0)">Scott Briggs (he/him/his)</span><br></div><div><font face="arial, sans-serif" style="background-color:rgb(255,255,255)" color="#000000">Administrator</font></div><div><font face="arial, sans-serif" style="background-color:rgb(255,255,255)" color="#000000"><br></font></div><div dir="ltr"><font face="arial, sans-serif" style="background-color:rgb(255,255,255)" color="#000000">Advanced Study Program<br>Education, Engagement and Early-Career Development<br>National Center For Atmospheric Research</font></div><div><font face="arial, sans-serif" size="1" color="#000000"><i style="background-color:rgb(255,255,255)">phone: 303.497.1607</i></font></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>