A Lagrangian Perspective of Microphysical Impact on Ice Cloud Evolution and Radiative Heating

Autor(en)

S. Sullivan, A. Voigt, A. Miltenberger, C. Rolf, M. Krämer

Abstrakt

We generate trajectories in storm-resolving simulations in order to quantify the effect of ice microphysics on tropical upper-tropospheric cloud-radiative heating. The pressure and flow field tracked along the trajectories are used to run different ice microphysical schemes, both one- and two-moment formulations within the Icosahedral Non-hydrostatic Model model and a separate offline box microphysics model (CLaMS-Ice). This computational approach allows us to isolate purely microphysical differences in a variant of “microphysical piggybacking;” feedbacks of microphysics onto pressure and the flow field, for example, via latent heating, are suppressed. Despite these constraints, we find about a 5-fold difference in median cloud ice mass mixing ratios (q

_i) and ice crystal number (N

_i) between the microphysical schemes and very distinct q

_i distributions versus temperature and relative humidity with respect to ice along the trajectories. After investigating microphysical formulations for nucleation, depositional growth, and sedimentation, we propose three cirrus lifecycles: a weak source-strong sink lifecycle whose longwave and shortwave heating are smallest due to short lifetime and low optical depth, a strong source-weak sink lifecycle whose longwave and shortwave heating are largest due to long lifetime and high optical depth, and a strong source-strong sink lifecycle with intermediate radiative properties.

Organisation(en)

Institut für Meteorologie und Geophysik

Externe Organisation(en)

University of Arizona, Karlsruher Institut für Technologie, Johannes Gutenberg-Universität Mainz, Forschungszentrum Jülich

Journal

Journal of Advances in Modeling Earth Systems

Band

14

ISSN

1942-2466

DOI

https://doi.org/10.1029/2022MS003226

Publikationsdatum

10-2022

Peer-reviewed

Ja

ÖFOS 2012

105204 Klimatologie, 105205 Klimawandel, 105206 Meteorologie

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Erdkunde und Planetologie, Global and Planetary Change, Environmental Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/27b6ce26-526f-4868-9c12-8135d109fdb8