[Grad-postdoc-assn] Postdoc Seminars Tomorrow

Paula Fisher paulad at ucar.edu
Tue Jan 30 15:42:00 MST 2007


Hi All,

Please note that there are two postdocs giving seminars tomorrow.  I 
hope that some of you will be able to attend and offer your support.
Paula



1.  Jian Lu
Expansion of the Hadley cell under global warming
http://www.cdc.noaa.gov/cdc/seminars/seminars.html

2.  Yue Deng
 > Speaker: Yue Deng, HAO
 >
 > Time:  January 31, 2007, 1:30 pm, CG1-2126 
http://www.ucar.edu/org/bouldermap.shtml
 >
 > Title: Examining the High-Latitude Thermosphere and Ionosphere Using 
a Global Model
 >
 > Abstract:
 >
 > The thermosphere and ionosphere are two overlapping regions of the 
atmosphere that are tightly coupled in many ways, including chemistry, 
momentum transference, and heating due to velocity differences. To 
examine the coupling between thermosphere and ionosphere, the new 
developed 3-Dimensional Global Ionosphere-Thermosphere Model (GITM) is 
used to explore responses to magnetospheric and solar forcing in the 
coupled thermosphere-ionosphere system. First, the impact of solar 
activity and geomagnetic activity on the neutral wind has been 
thoroughly quantified. Secondly, we have examined the effect of the 
vertical ion convection on the electron density at high-latitudes, which 
has been ignored in most situations. Finally, the 
thermosphere-ionosphere coupling is studied by quantifying the effects 
of oscillating electric fields on the Joule heating, the primary driver 
of global ionospheric storms.





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