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@ARTICLE{Stephan:811284,
author = {Stephan, Claudia and Alexander, M. Joan and Hedlin, Michael
and de Groot-Hedlin, Catherine D. and Hoffmann, Lars},
title = {{A} case study on the far-field properties of propagating
tropospheric gravity waves},
journal = {Monthly weather review},
volume = {144},
number = {8},
issn = {1520-0493},
address = {Washington, DC [u.a.]},
publisher = {AMS87486},
reportid = {FZJ-2016-03785},
pages = {2947–2961},
year = {2016},
abstract = {Mesoscale gravity waves were observed by barometers
deployed as part of the USArray Transportable Array on June
29, 2011 near two mesoscale convective systems in the Great
Plains region of the US. Simultaneously, AIRS satellite data
indicated stratospheric gravity waves propagating away from
the location of active convection. Peak perturbation
pressure values associated with waves propagating outside of
regions where there was precipitation reached amplitudes
close to 400 Pa at the surface. Here we investigate the
origins of the waves and their relationship to observed
precipitation with a specialized model study. Simulations
with a 4-km resolution dry numerical model reproduce the
propagation characteristics and amplitudes of the observed
waves with a high degree of quantitative similarity despite
the absence of any boundary layer processes, surface
topography, or moist physics in the model. The model is
forced with a three-dimensional, time-dependent latent
heating/cooling field that mimics the latent heating inside
the precipitation systems. The heating is derived from the
network of weather radar precipitation observations. This
shows that deep, intense latent heat release within the
precipitation systems is the key forcing mechanism for the
waves observed at ground level by the USArray. Furthermore,
the model simulations allow for a more detailed
investigation of the vertical structure and propagation
characteristics of the waves. It is found that the
stratospheric and tropospheric waves are triggered by the
same sources, but have different spectral properties.
Results also suggest that the propagating tropospheric waves
may potentially remotely interact with and enhance active
precipitation.},
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:000380796200010},
doi = {10.1175/MWR-D-16-0054.1},
url = {https://juser.fz-juelich.de/record/811284},
}