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@ARTICLE{Stephan:862355,
author = {Stephan, C. C. and Strube, C. and Klocke, D. and Ern, M.
and Hoffmann, L. and Preusse, P. and Schmidt, H.},
title = {{G}ravity waves in global high‐resolution simulations
with explicit and parameterized convection},
journal = {Journal of geophysical research / D Atmospheres D},
volume = {124},
number = {8},
issn = {2169-8996},
address = {Hoboken, NJ},
publisher = {Wiley},
reportid = {FZJ-2019-02689},
pages = {4446-4459},
year = {2019},
abstract = {Increasing computing resources allow us to run weather and
climate models at horizontal resolutions of 1‐10 km. At
this range, which is often referred to as the convective
gray zone, clouds and convective transport are partly
resolved, yet models may not achieve a satisfactory
performance without convective parameterizations. Meanwhile,
large fractions of the gravity wave (GW) spectrum become
resolved at these scales. Convectively generated GWs are
sensitive to spatio‐temporal characteristics of convective
cells. This raises the question of how resolved GWs respond
to changes in the treatment of convection. Two global
simulations with a horizontal grid spacing of 5 km are
performed, one with explicit and one with parameterized
convection. The latitudinal profiles of absolute
zonal‐mean GW momentum flux match well between both model
configurations and observations by satellite limb sounders.
However, the simulation with explicit convection shows
$~30‐50\\%$ larger zonal‐mean momentum fluxes in the
summer hemisphere subtropics, where convection is the
dominant source of GWs. Our results imply that changes in
convection associated with the choice of explicit versus
parameterized convection can have important consequences for
resolved GWs, with broad implications for the circulation
and the transport in the middle atmosphere.},
cin = {IEK-7 / JSC},
ddc = {550},
cid = {I:(DE-Juel1)IEK-7-20101013 / I:(DE-Juel1)JSC-20090406},
pnm = {244 - Composition and dynamics of the upper troposphere and
middle atmosphere (POF3-244) / 511 - Computational Science
and Mathematical Methods (POF3-511) / ESiWACE - Excellence
in SImulation of Weather and Climate in Europe (675191)},
pid = {G:(DE-HGF)POF3-244 / G:(DE-HGF)POF3-511 /
G:(EU-Grant)675191},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000469071400011},
doi = {10.1029/2018JD030073},
url = {https://juser.fz-juelich.de/record/862355},
}