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Comet Calendar Event Details
Energy Input Uncertainty and Physical Processes in the Upper atmosphere Using Numerical Models
Wednesday, Feb 13, 2013
4 p.m. - 5:15 p.m. Location: SLC 1.102

Yue Deng, Ph.D.
Department of Physics
The University of Texas at Arlington

The ionosphere and thermosphere are two overlapping regions of the upper atmosphere that are tightly coupled. The ionosphere represents the plasma and the thermosphere represents the neutral constituents. Understanding of the ionosphere/thermosphere system under different conditions is important for space research and space weather applications. Currently, the imprecision of the energy input estimation and the unknown physical processes in the meso- and small-scales are two big challenges to the upper atmosphere community. First, various data and models are utilized to investigate the variations of energy inputs (solar irradiance and geomagnetic energy) and distribution and their influences on the coupled thermosphere-ionosphere system.  Secondly, Global Ionosphere Thermosphere Model (GITM), the first non-hydrostatic global model in the upper atmosphere, has been employed to investigate the primary characteristics of non-hydrostatic processes after a sudden enhancement of magnetospheric energy input. Running this model in high resolution, a series of studies have been conducted on the substantial neutral density enhancement in the cusp. These researches improve the description of energy inputs into ionosphere/thermosphere and the understanding of the meso- and small-scale physical processes.

Bio: Yue Deng is Assistant Professor in the Department of Physics at the University of Texas at Arlington, Texas USA. She received her BS and MS degrees at the Peking University in 1997 and 2001, respectively, and her PhD degree at the University of Michigan at Ann Arbor in 2006. She is the co-developer of the first global non-hydrostatic model in the upper atmosphere, Global Ionosphere Thermosphere Model (GITM). Her main research interest is the coupling between magnetosphere and ionosphere/thermosphere under different geospace conditions. Dr. Deng was awarded the prestigious NSF CAREER award and her research is supported by NSF, NASA and Air Force Office for Scientific Research (AFOSR).

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