HR: 14:27h
AN: SA13B-04 [Abstracts]
TI: Understanding the ionosphere-thermosphere system through modeling and data assimilation
AU: * Lu, G
EM: ganglu@ucar.edu
AF: High Altitude Observatory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO
80307-3000 United States
AU: Richmond, A D
EM: richmond@ucar.edu
AF: High Altitude Observatory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO
80307-3000 United States
AU: Roble, R G
EM: roble@ucar.edu
AF: High Altitude Observatory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO
80307-3000 United States
AB:
The ionosphere and thermosphere constitute an important part of near Earth
space environment where low-Earth orbiting satellites operate and through
which communication and navigation signals are being transmitted. The
ionosphere-thermosphere system is, however, subject to several geophysical
forcings originating from the Sun. The interaction between the solar wind
and the Earth's magnetosphere results in a fraction of the solar wind
energy and plasma being transmitted into the magnetosphere, and
subsequently into the ionosphere and thermosphere to produce auroras and
other geomagnetic phenomena. Solar energetic particles penetrate into the
upper and middle atmosphere to cause significant ionization and chemical
effects. Solar UV and EUV radiation is the main source of energy for
heating, ionization, and photochemical reactions in the thermosphere and
ionosphere. The LWS' Ionosphere-Thermosphere Storm Probe (ITSP) mission
is designated to monitor the variability of the ionosphere-thermosphere
system in response to these geophysical forcings. The Assimilative Mapping
of Ionospheric Electrodynamics (AMIE) procedure and the
Thermosphere-Ionosphere-Mesosphere Electrodynamics General Circulation
Model (TIME-GCM) are well suited to contribute to the scientific objectives
of the ITSP mission. In this talk we will discuss the capabilities of AMIE
and TIME-GCM, and jointly, how they can provide a better understanding of
the impact of various external forcings on the ionosphere-thermosphere
system.
DE: 2427 Ionosphere/atmosphere interactions (0335)
DE: 2431 Ionosphere/magnetosphere interactions (2736)
DE: 2435 Ionospheric disturbances
DE: 2437 Ionospheric dynamics
DE: 2479 Solar radiation and cosmic ray effects
SC: SPA-Aeronomy [SA]
MN: 2005 Joint Assembly