Improved short-term variability in the thermosphere-ionosphere-mesosphere-electrodynamics general circulation model

Improved short-term variability in the thermosphere-ionosphere-mesosphere-electrodynamics general circulation model

Häusler, K.
Hagan, M.E.
Baumgaertner, A.J.G.
Maute, A.
Lu, G.
Doornbos, E.N.
Bruinsma, S.
Forbes, J.M.
Gasperini, F.

Aerospace Engineering

Space Engineering

2014-08-06

We report on a new source of tidal variability in the National Center for Atmospheric Research thermosphere-ionosphere-mesosphere-electrodynamics general circulation model (TIME-GCM). Lower boundary forcing of the TIME-GCM for a simulation of November–December 2009 based on 3-hourly Modern-Era Retrospective Analysis for Research and Application (MERRA) reanalysis data includes day-to-day variations in both diurnal and semidiurnal tides of tropospheric origin. Comparison with TIME-GCM results from a heretofore standard simulation that includes climatological tropospheric tides from the global-scale wave model reveal evidence of the impacts of MERRA forcing throughout the model domain, including measurable tidal variability in the TIME-GCM upper thermosphere. Additional comparisons with measurements made by the Gravity field and steady-state Ocean Circulation Explorer satellite show improved TIME-GCM capability to capture day-to-day variations in thermospheric density for the November–December 2009 period with the new MERRA lower boundary forcing.

TIME-GCM
thermosphere
atmospheric tides
GOCE
lower boundary condition

http://resolver.tudelft.nl/uuid:2f0856b4-a5c2-44e2-9647-c9c5df542317

https://doi.org/10.1002/2014JA020006

American Geophysical Union

2015-02-06

2169-9402

Journal of Geophysical Research: Space Physics, 119 (8), 2014

Institutional Repository

journal article

© 2014 American Geophysical Union