@Article{PardoMachCecc:2018:ClMiEv,
author = "Pardo, Lianet Hern{\'a}ndez and Machado, Luiz Augusto Toledo and
Cecchini, Micael Amore",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade de
S{\~a}o Paulo (USP)}",
title = "Cloud-top microphysics evolution in the Gamma phase space from a
modeling perspective",
journal = "Atmospheric Chemistry and Physics Discussion",
year = "2018",
volume = "2018",
abstract = ". This research employs the recently introduced Gamma phase space
to study the evolution of warm cloud microphysics, to evaluate
different microphysics parameterizations and to propose an
adjustment to bulk schemes for an improved description of cloud
droplet size distributions (DSDs). A bin parameterization is
employed to describe the main features of observed cloud-top DSD
paths in the Gamma phase space. The modeled DSD evolution during
the warm cloud life cycle is 5 compared to the results obtained
from HALO airplane measurements during the ACRIDICON-CHUVA
campaign in the Amazon dry-to-wet season transition. The
comparison shows an agreement between the observed and simulated
trajectories in the Gamma phase space, providing a suitable
qualitative representation of the DSD evolution. The degree of
similarity between the trajectories is defined by the conditions
of the environment, such as the aerosol number concentration,
which modify the DSD evolution through modulation of its driving
forces. The modeled DSD properties were also projected in the Nd
\− Def f space 10 to obtain further insights into their
life cycle. Two different bulk microphysics parameterizations were
evaluated regarding the evolution of the DSD and using the bin
scheme as a reference. The results show the weakness of bulk
schemes in representing trajectories in the Gamma phase space;
thus, a new closure is proposed for better comparisons to the
reference. The new closure resulted in an improvement in the
representation of the DSD evolution, cloud droplet effective
diameter and rain mixing ratio.",
doi = "10.5194/acp-2018-190",
url = "http://dx.doi.org/10.5194/acp-2018-190",
issn = "1680-7367",
language = "en",
targetfile = "pardo_cloud.pdf",
urlaccessdate = "28 abr. 2024"
}