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ACP | Articles | Volume 20, issue 12
Atmos. Chem. Phys., 20, 7617–7644, 2020
https://doi.org/10.5194/acp-20-7617-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 20, 7617–7644, 2020
https://doi.org/10.5194/acp-20-7617-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 01 Jul 2020

Research article | 01 Jul 2020

Propagation of gravity waves and its effects on pseudomomentum flux in a sudden stratospheric warming event

In-Sun Song et al.

Data sets

ERA Interim, 6-hourly, instantaneous, pressure level, analysis, Reading European Centre for Medium-Range Weather Forecasts (ECMWF) https://apps.ecmwf.int/datasets/data/ interim-full-daily/levtype=pl

MERRA-2 inst6_3d_ana_Np: 3d, 6-Hourly, Instantaneous, Pressure-Level, Analysis, 30 Analyzed Meteorological Fields V5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/A7S6XP56VZWS

6-hourly, instantaneous, pressure level, assimilation Naval Research 5 Laboratory (NRL) https://map.nrl. navy.mil/map/pub/nrl/aim9c

Grid- and subgrid-scale topography data National Center for Atmospheric Research (NCAR) https:// svn-ccsm-inputdata.cgd.ucar.edu/trunk/inputdata/atm/cam/topo

Model code and software

An update to the Horizontal Wind Model (HWM): The quiet time thermosphere D. P. Drob, J. T. Emmert, J. W. Meriwether, J. J. Makela, E. Doornbos, M. Conde, G. Hernandez, J. Noto, K. A. Zawdie, S. E. McDonald, J. D. Huba, and J. H. Klenzing https://doi.org/10.1002/2014EA000089

MSISE model A. E. Hedin https://ccmc.gsfc.nasa.gov/models/modelinfo.php?model=MSISE

Serial Fortran solvers for ODE initial value problems A. C. Hindmarsh https://computation.llnl.gov/casc/odepack

Libtricubic N. Bigaouette https://github.com/nbigaouette/libtricubic

Publications Copernicus
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Short summary
A modeling study on the effects of propagation of atmospheric gravity waves is carried out for the 2009 sudden stratospheric warming (SSW) event. It is found that gravity-wave-induced momentum fluxes are significantly affected by horizontal refraction and the Earth's curvature effects. Gravity wave convergence and effects of ray geometry also have some impact. In the evolution of the SSW, significantly enhanced momentum fluxes are likely to change nonlocally nearby large-scale vortex structures.
A modeling study on the effects of propagation of atmospheric gravity waves is carried out for...
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