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<small>Hi NCAR Postdocs,<br>
<br>
</small><small>Just a reminder that the Thompson Lecture Series
(TLS) featuring Dr. Geoffrey Vallis starts tomorrow and runs
through Friday. You can find the full schedule <a
href="https://wiki.ucar.edu/display/aspthompson08/Dr.+Geoffrey+Vallis+schedule+%28Nov+20-22%2C+2013%29">here</a>.
You can read more about the TLS and Dr. Vallis <a
href="https://wiki.ucar.edu/display/aspthompson08/About+Dr.+Geoffrey+Vallis">here</a>.
Abstracts for Dr. Vallis's two lectures are below.<br>
<br>
The list of all the social events is below. You can still sign up
for individual meetings with Dr. Vallis at the links provided.
There are a couple slots on Thursday and Friday still open. Also,
don't forget the postdoc potluck tomorrow night. You can sign up
to bring a dish below.<br>
<b><br>
</b><b>Wed, Nov 20</b><br>
Lunch with postdocs - 12:30-2pm, ML Cafeteria<br>
<a
href="https://wiki.ucar.edu/display/aspthompson08/Individual+meetings+with+Geoffrey">5
slots for postdoc meetings</a> - 2-5pm, ML Chapman Room<br>
<a
href="https://wiki.ucar.edu/display/aspthompson08/Potluck+dinner+with+Geoffrey+%28Nov+20%2C+2013%29">Potluck
dinner with postdocs and their families</a> - 5:30pm, ML Damon
Room<br>
<br>
<b>Thurs, Nov 21</b></small><big><br>
</big><small>Lunch with postdocs - 12:30-2pm, FL Cafeteria<br>
<a
href="https://wiki.ucar.edu/display/aspthompson08/Individual+meetings+with+Geoffrey">5
slots for postdoc meetings</a> - 2-5pm, FL2 1003<br>
Dinner at The Med - 6:30pm (contact Kyla with questions -
<a class="moz-txt-link-abbreviated" href="mailto:kdahlin@ucar.edu">kdahlin@ucar.edu</a>)<br>
<b><br>
</b><b>Fri, Nov 22</b><br>
Breakfast and science discussion with postdocs - 9-10:30am, South
Auditorium<br>
</small><small><a
href="https://wiki.ucar.edu/display/aspthompson08/Individual+meetings+with+Geoffrey">3
slots for postdoc meetings</a> - 10:30am-12pm, South Auditorium<big><big><br>
</big></big><br>
<br>
See you there!<br>
Micah<br>
</small><small> <br>
<br>
</small><big> </big>
<div><big><b><small><small>General Interest Lecture<br>
Wed, Nov. 20th - 11am-12:30pm<br>
ML Main Seminar Room<br>
</small></small></b></big></div>
<big> </big>
<div><small><br>
<i>The Response of the Large-Scale Circulation to Global Warming</i></small></div>
<big> </big>
<div><small><br>
Comprehensive climate models are unanimous in predicting a
warming when greenhouse gases are added. Although there is some
disagreement about the magnitude of the response to the warming,
there is much more disagreement about regional changes in
weather and climate. Speaking a little loosely, one might say
that thermodynamic changes seem to be much more robust than
dynamical changes, and this can be ascribed to the nonlinearity
of the equations of motion.<br>
<br>
In this talk I will first discuss what the globally averaged
temperature response that will actually result from increased
greenhouse gases is likely to be based on empirical methods. I
will then discuss what the response of the circulation might be,
including changes in the height of the tropopause and shifts in
the latitude of the main features of the circulation.<br>
<br>
<b><br>
</b><b>Science Lecture<br>
Thurs, Nov. 21st - 11-12:30pm<br>
FL2 1022<br>
<i><br>
</i></b><i>Jets and Superrotation in Idealized Atmospheres</i><br>
<br>
I will discuss the mechanisms of zonal jets, and in particular
of equatorial superrotation, using very idealized numerical
models using the primitive equations on the sphere. It is
well-known that zonal jets robustly arise in rotating
atmospheres there is a wavemaker at a particular latitude.
Rossby waves are then generated that propagate away, and
eastward momentum converging on the source region producing a
zonal jet. Such a mechanism produces the jet stream on Earth
and, most likely, the jets on giant planets including the
equatorial superrotation. However, on slowly rotating
terrestrial atmospheres it seems unlikely that superrotation is
produced by that mechanism. Rather, simulations indicate that,
at small thermal Rossby number, a mechanism involving equatorial
Kelvin waves is involved.</small></div>
<big> </big><small><small><br>
<br>
<br>
</small></small>
<pre class="moz-signature" cols="72">--
Micah B. Hahn, PhD, MPH
NCAR | CDC Postdoctoral Research Fellow
National Center for Atmospheric Research
Climate Science and Applications Program
PO Box 3000
Boulder, CO 80307
Office: 303-497-2894
Fax: 303-497-8386
<a class="moz-txt-link-abbreviated" href="mailto:mhahn@ucar.edu">mhahn@ucar.edu</a></pre>
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