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

Sullivan, S. 1; Voigt, A.; Miltenberger, A.; Rolf, C.; Krämer, M.
1 Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO), Karlsruher Institut für Technologie (KIT)

Abstract:

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.


Verlagsausgabe §
DOI: 10.5445/IR/1000153775
Veröffentlicht am 16.12.2022
Originalveröffentlichung
DOI: 10.1029/2022MS003226
Scopus
Zitationen: 3
Web of Science
Zitationen: 1
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2022
Sprache Englisch
Identifikator ISSN: 1942-2466
KITopen-ID: 1000153775
HGF-Programm 12.11.32 (POF IV, LK 01) Advancing atmospheric and Earth system models
Erschienen in Journal of Advances in Modeling Earth Systems
Verlag American Geophysical Union (AGU)
Band 14
Heft 11
Seiten Art.: e2022MS003226
Vorab online veröffentlicht am 31.10.2022
Schlagwörter ice microphysics, cirrus lifecycle, cloud-radiative heating, trajectories, storm-resolving simulations, Asian monsoon
Nachgewiesen in Dimensions
Web of Science
Scopus
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