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@ARTICLE{Tonttila:256575,
author = {Tonttila, J. and O'Connor, E. J. and Hellsten, A. and
Hirsikko, A. and O'Dowd, C. and Järvinen, H. and
Räisänen, P.},
title = {{T}urbulent structure and scaling of the inertial subrange
in a stratocumulus-topped boundary layer observed by a
{D}oppler lidar},
journal = {Atmospheric chemistry and physics},
volume = {15},
number = {10},
issn = {1680-7324},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2015-06450},
pages = {5873 - 5885},
year = {2015},
abstract = {The turbulent structure of a stratocumulus-topped marine
boundary layer over a 2-day period is observed with a
Doppler lidar at Mace Head in Ireland. Using profiles of
vertical velocity statistics, the bulk of the mixing is
identified as cloud driven. This is supported by the
pertinent feature of negative vertical velocity skewness in
the sub-cloud layer which extends, on occasion, almost to
the surface. Both coupled and decoupled turbulence
characteristics are observed. The length and timescales
related to the cloud-driven mixing are investigated and
shown to provide additional information about the structure
and the source of the mixing inside the boundary layer. They
are also shown to place constraints on the length of the
sampling periods used to derive products, such as the
turbulent dissipation rate, from lidar measurements. For
this, the maximum wavelengths that belong to the inertial
subrange are studied through spectral analysis of the
vertical velocity. The maximum wavelength of the inertial
subrange in the cloud-driven layer scales relatively well
with the corresponding layer depth during pronounced
decoupled structure identified from the vertical velocity
skewness. However, on many occasions, combining the analysis
of the inertial subrange and vertical velocity statistics
suggests higher decoupling height than expected from the
skewness profiles. Our results show that investigation of
the length scales related to the inertial subrange
significantly complements the analysis of the vertical
velocity statistics and enables a more confident
interpretation of complex boundary layer structures using
measurements from a Doppler lidar.},
cin = {IEK-8},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {243 - Tropospheric trace substances and their
transformation processes (POF3-243)},
pid = {G:(DE-HGF)POF3-243},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000355289200034},
doi = {10.5194/acp-15-5873-2015},
url = {https://juser.fz-juelich.de/record/256575},
}