@Article{CecchiniMWCKAAAABFKMMMMPPPPRW:2017:InPoAp,
author = "Cecchini, Micael Amore and Machado, Luiz Augusto Toledo and
Wendisch, Manfred and Costa, Anja and Kr{\"a}mer, Martina and
Andreae, Meinrat O. and Afchine, Armin and Albrecht, Rachel I. and
Artaxo, Paulo and Borrmann, Stephan and F{\"u}tterer, Daniel and
Klimach, Thomas and Mahnke, Christoph and Martin, Scot T. and
Minikin, Andreas and Molleker, Sergej and Pardo, Lianet
Hern{\'a}ndez and P{\"o}hlker, Christopher and P{\"o}hlker,
Mira L. and P{\"o}schl, Ulrich and Rosenfeld, Daniel and
Weinzierl, Bernadett",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universit{\"a}t
Leipzig} and {Institut f{\"u}r Energie und Klimaforschung
(IEK-7)} and {Institut f{\"u}r Energie und Klimaforschung
(IEK-7)} and {Max Planck Institute for Chemistry} and {Institut
f{\"u}r Energie und Klimaforschung (IEK-7)} and {Universidade de
S{\~a}o Paulo (USP)} and {Universidade de S{\~a}o Paulo (USP)}
and {Max Planck Institute for Chemistry} and {Deutsches Zentrum
f{\"u}r Luft- und Raumfahrt (DLR)} and {Max Planck Institute for
Chemistry} and {Max Planck Institute for Chemistry} and {Harvard
University} and {Deutsches Zentrum f{\"u}r Luft- und Raumfahrt
(DLR)} and {Johannes Gutenberg-Universit{\"a}t} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Max Planck Institute
for Chemistry} and {Max Planck Institute for Chemistry} and {Max
Planck Institute for Chemistry} and {The Hebrew University of
Jerusalem} and {Deutsches Zentrum f{\"u}r Luft- und Raumfahrt
(DLR)}",
title = "Illustration of microphysical processes in Amazonian deep
convective clouds in the Gamma phase space: introduction and
potential applications",
journal = "Atmospheric Chemistry and Physics Discussion",
year = "2017",
volume = "185",
pages = "1--49",
month = "marc.",
abstract = "The behavior of tropical clouds remains a major open scientific
question, given that the associated physics is not well
represented by models. One challenge is to realistically reproduce
cloud droplet size distributions (DSD) and their evolution over
time and space. Many applications, not limited to models, use the
Gamma function to represent DSDs. However, there is almost no
study dedicated to understanding the phase space of this function,
which is given by the three parameters that define the DSD
intercept, shape, and curvature. Gamma phase space may provide a
common framework for parameterizations and inter-comparisons.
Here, we introduce the phase-space approach and its
characteristics, focusing on warm-phase microphysical cloud
properties and the transition to the mixed-phase layer. We show
that trajectories in this phase space can represent DSD evolution
and can be related to growth processes. Condensational and
collisional growth may be interpreted as pseudo-forces that induce
displacements in opposite directions within the phase space. The
actually observed movements in the phase space are a result of the
combination of such pseudo-forces. Additionally, aerosol effects
can be evaluated given their significant impact on DSDs. The DSDs
associated with liquid droplets that favor cloud glaciation can be
delimited in the phase space, which can help models to adequately
predict the transition to the mixed phase. We also consider
possible ways to constrain the DSD in two-moment bulk microphysics
schemes, where the relative dispersion parameter of the DSD can
play a significant role. Overall, the Gamma phase-space approach
can be an invaluable tool for studying cloud microphysical
evolution and can be readily applied in many scenarios that rely
on Gamma DSDs.",
doi = "10.5194/acp-2017-185",
url = "http://dx.doi.org/10.5194/acp-2017-185",
issn = "1680-7367",
language = "en",
targetfile = "cecchini_illustration.pdf",
urlaccessdate = "28 abr. 2024"
}