The Response of the Mesopause Region to Solar Cycle Changes in Radiative and Geomagnetic Forcing

Physics

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0335 Ion Chemistry Of The Atmosphere (2419, 2427), 0341 Middle Atmosphere: Constituent Transport And Chemistry (3334), 0342 Middle Atmosphere: Energy Deposition (3334), 1626 Global Climate Models (3337, 4928), 1650 Solar Variability (7537)

Scientific paper

NCAR's Whole Atmosphere Community Climate Model (WACCM) is used to study the atmospheric response of the mesopause region to changes in solar and geomagnetic forcing over the 11 year solar cycle. WACCM is a general circulation model that incorporates interactive chemistry that solves for both neutral and ion species. Energy inputs include solar radiation and energetic particles, which vary significantly over the solar cycle. Model simulations clearly show changes in composition and dynamical variables throughout the upper atmosphere, and these in turn affect the terms in the energy budget of the mesopause region. The extent to which these changes can propagate to lower atmospheric regions is also examined.

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