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@ARTICLE{Tsuchiya:810804,
author = {Tsuchiya, Chikara and Sato, Kaoru and Alexander, M. Joan
and Hoffmann, Lars},
title = {{M}jo-related intraseasonal variation of gravity waves in
the southern hemisphere tropical stratosphere revealed by
high-resolution airs observations},
journal = {Journal of geophysical research / Atmospheres},
volume = {121},
number = {13},
issn = {2169-897X},
address = {Hoboken, NJ},
publisher = {Wiley},
reportid = {FZJ-2016-03387},
pages = {7641–7651},
year = {2016},
abstract = {The intraseasonal variability of gravity waves (GWs) in the
austral summer middle stratosphere was examined using
dedicated high-resolution temperature retrieval from the
Atmospheric Infrared Sounder data. Composite maps were
made of stratospheric GW temperature variances, large-scale
zonal winds around the tropopause, and precipitation based
on the real-time multivariate Madden-Julian Oscillation
(MJO) index. Regional distributions of these quantities are
synchronized with the MJO: The GW variances are larger for
stronger precipitation, and for more strongly westward wind
around the tropopause at a given precipitation. These
results suggest that the GWs observed by AIRS in the
stratosphere originate from convection. Moreover, it is
shown that the zonal wind around the tropopause likely
controls the GW propagation into the stratosphere by a
critical level filtering mechanism and/or the GW generation
by an obstacle source effect. This means that the MJO can
modulate the middle atmospheric circulation by regulating
the GWs in two ways, namely, generation and propagation.},
cin = {JSC},
ddc = {550},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {511 - Computational Science and Mathematical Methods
(POF3-511)},
pid = {G:(DE-HGF)POF3-511},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000380730500009},
doi = {10.1002/2015JD024463},
url = {https://juser.fz-juelich.de/record/810804},
}