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UID:f59de119-3edd-4ff6-82f0-70b029868e15@events.stage.louisville.edu
DTSTAMP:20260501T025546Z
DTSTART:20260220T200000Z
DTEND:20260220T210000Z
SUMMARY:Colloquium (Jia Yue): The Wizard of O(z), Thermosphere (LEO) Physic
 s
CONTACT:Swagato Banerjee\, 5028520915\, email:swagato.banerjee@louisville.e
 du
DESCRIPTION:Place: Natural Sciences Building, Room 112 \n\n\nThis seminar
  is based on an Encyclopedia article that Drs. Jia Yue and Wenbin Wang rec
 ently wrote. The thermosphere is where many LEO objects including satellit
 es, International Space Station and space debris are flying inside. Thermo
 sphere density is by far the largest uncertainty forecasting satellite dra
 g and orbit propagation. In this talk, Dr. Yue will review the recent prog
 ress of thermosphere physics driving the variability of thermosphere densi
 ty, composition, temperature, and wind. In particular, mass density in the
  upper thermosphere is mainly controlled by the abundance of atomic oxygen
  as a function of geometric height (O(z)). Many processes can cause variat
 ions in O(z), including solar EUV heating, vertical and meridional advecti
 on, eddy and molecular diffusion, NO and CO2 cooling, etc. During geomagne
 tic active times, Joule heating, enhanced NO cooling, altered circulations
 , strong EUV heating and other processes lead to drastic changes of neutra
 l density. At the end, Dr. Yue would review the fundamental thermosphere p
 hysics under the lens of future missions, GDC and DYNAMIC. 
GEO:38.2139;-85.7597
LOCATION:Natural Sciences Building
URL:https://events.stage.louisville.edu/events/colloquium-jia-yue-wizard-oz
 -thermosphere-leo-physics/2026-02-20
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