vertical resolution dependence of gravity wave momentum flux simulated by an atmospheric general circulation model
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ID: 260039
2015
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Abstract
The dependence of the gravity wave spectra of energy and momentum flux on
the horizontal resolution and time step of atmospheric general circulation
models (AGCMs) has been thoroughly investigated in the past. In contrast,
much less attention has been given to the dependence of these gravity wave
parameters on models' vertical resolutions. The present study demonstrates
the dependence of gravity wave momentum flux (GWMF) in the stratosphere and
mesosphere on the model's vertical resolution, which is evaluated using an
AGCM with a horizontal resolution of about 0.56°. We performed a
series of sensitivity test simulations changing only the model's vertical
resolution above a height of 8 km, and found a global reduction of GWMF with
increasing vertical resolution. Inertial gravity waves with short vertical
wavelengths simulated at higher vertical resolutions might play an important
role in determining GWMF in the summertime stratosphere. The sensitivity
test simulation also demonstrated the importance of the model's vertical
resolution on representing realistic behaviors of gravity waves near their
critical level.
| Reference Key |
watanabe2015geoscientificvertical
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|---|---|
| Authors | ;S. Watanabe;K. Sato;Y. Kawatani;M. Takahashi |
| Journal | international journal of quantum chemistry |
| Year | 2015 |
| DOI |
10.5194/gmd-8-1637-2015
|
| URL | |
| Keywords |
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