Simulating convective clouds with sustained supercooled liquid water down to -37.5°C using a spectral microphysics model

Details Simulating convective clouds with sustained supercooled liquid water down to -37.5°C using a spectral microphysics model Simulating convective clouds with sustained supercooled liquid water down to -37.5°C using a spectral microphysics model

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3887k&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 20, p. 3887-3890

Physics

50

Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Cloud Physics And Chemistry, Hydrology: Precipitation

Scientific paper

Aircraft observations of highly supercooled water in convective clouds (1.8 gm-3 at -37.5°C) were reproduced by a numerical cloud model with explicit microphysical processes and turbulent effects. The model showed that large concentrations of small cloud droplets induced by high concentrations of CCN and a strong updraft were essential in reproducing the observations. The same model reproduced microphysically maritime clouds with fast depletion of cloud water by just changing the CCN spectrum. The constrains imposed by these extreme conditions revealed the weakness of existing cloud parameterizations, and the necessity of inclusion of very detailed explicit microphysical and turbulent cloud processes in cloud models.

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