|Student Name:||Capt William R. Frey|
|Thesis:||Modeling the Thermosphere as a Driven-Dissipative Thermodynamic System|
|Location:||BLDG 646 ROOM 207|
|Date & Time:||01/25/2013 at 1300|
|Abstract:|| This thesis builds on Burke et al.’s driven-dissipative model (2009) to model the arithmetic mean temperature, T1/2 , defined by the Jacchia, 1977 model (J77), using the magnetospheric electric field as a driver. Three methods of treating the UV contribution to T1/2¬ (T1/2UV) are tested. Two model parameters, the coupling and relaxation constants, are adjusted for 38 storms from 2002 - 2008 to minimize modeled T1/2 errors. Observed T1/2 values are derived from densities and heights measured by the GRACE satellite. It is found that allowing T1/2 UV to vary produces the lowest errors for 27 of 38 storms in the sample and 27 of 28 storms with decreasing UV contributions over the storm period. Treating T1/2UV as a constant produces the lowest errors for 7 of 10 storms with increasing UV contributions. The coupling and relaxation constants were found to vary over the solar cycle. The driven-dissipative model produces density errors slightly lower than HASDM storm time errors.