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@ARTICLE{Trinh:823848,
author = {Trinh, Quang Thai and Kalisch, Silvio and Preusse, Peter
and Ern, Manfred and Chun, Hye-Yeong and Eckermann, Stephen
D. and Kang, Min-Jee and Riese, Martin},
title = {{T}uning of a convective gravity wave source scheme based
on {HIRDLS} observations},
journal = {Atmospheric chemistry and physics},
volume = {16},
number = {11},
issn = {1680-7324},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2016-06488},
pages = {7335 - 7356},
year = {2016},
abstract = {Convection as one dominant source of atmospheric gravity
waves (GWs) has been the focus of investigation over recent
years. However, its spatial and temporal forcing scales are
not well known. In this work we address this open issue by a
systematic verification of free parameters of the Yonsei
convective GW source scheme based on observations from the
High Resolution Dynamics Limb Sounder (HIRDLS). The
instrument can only see a limited portion of the gravity
wave spectrum due to visibility effects and observation
geometry. To allow for a meaningful comparison of simulated
GWs to observations, a comprehensive filter, which mimics
the instrument limitations, is applied to the simulated
waves. By this approach, only long horizontal-scale
convective GWs are addressed. Results show that spectrum,
distribution of momentum flux, and zonal mean forcing of
long horizontal-scale convective GWs can be successfully
simulated by the superposition of three or four combinations
of parameter sets reproducing the observed GW spectrum.
These selected parameter sets are different for northern and
southern summer. Although long horizontal-scale waves are
only part of the full spectrum of convective GWs, the
momentum flux of these waves is found to be significant and
relevant for the driving of the QBO (quasi-biennial
oscillation). The zonal momentum balance is considered in
vertical cross sections of GW momentum flux (GWMF) and GW
drag (GWD). Global maps of the horizontal distribution of
GWMF are considered and consistency between simulated
results and HIRDLS observations is found. The latitude
dependence of the zonal phase speed spectrum of GWMF and its
change with altitude is discussed.},
cin = {IEK-7},
ddc = {550},
cid = {I:(DE-Juel1)IEK-7-20101013},
pnm = {244 - Composition and dynamics of the upper troposphere and
middle atmosphere (POF3-244)},
pid = {G:(DE-HGF)POF3-244},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000378354600039},
doi = {10.5194/acp-16-7335-2016},
url = {https://juser.fz-juelich.de/record/823848},
}