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ACP | Articles | Volume 19, issue 16
Atmos. Chem. Phys., 19, 10717–10738, 2019
https://doi.org/10.5194/acp-19-10717-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 19, 10717–10738, 2019
https://doi.org/10.5194/acp-19-10717-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 26 Aug 2019

Research article | 26 Aug 2019

Core and margin in warm convective clouds – Part 1: Core types and evolution during a cloud's lifetime

Reuven H. Heiblum et al.

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How do changes in warm-phase microphysics affect deep convective clouds?
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Time-dependent, non-monotonic response of warm convective cloud fields to changes in aerosol loading
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On the link between precipitation and the ice water path over tropical and mid-latitude regimes as derived from satellite observations
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Revised manuscript not accepted
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Cited articles

Ackerman, B.: Buoyancy and precipitation in tropical cumuli, J. Meteorol., 13, 302–310, https://doi.org/10.1175/1520-0469(1956)013<0302:BAPITC>2.0.CO;2, 1956. 
Altaratz, O., Koren, I., Reisin, T., Kostinski, A., Feingold, G., Levin, Z., and Yin, Y.: Aerosols' influence on the interplay between condensation, evaporation and rain in warm cumulus cloud, Atmos. Chem. Phys., 8, 15–24, https://doi.org/10.5194/acp-8-15-2008, 2008. 
Betts, A. K.: Non-precipitating cumulus convection and its parameterization, Q. J. Roy. Meteor. Soc., 99, 178–196, https://doi.org/10.1002/qj.49709941915, 1973. 
Burnet, F. and Brenguier, J.-L.: The onset of precipitation in warm cumulus clouds: An observational case-study, Q. J. Roy. Meteor. Soc., 136, 374–381, https://doi.org/10.1002/qj.552, 2010. 
Craven, J. P., Jewell, R. E., and Brooks, H. E.: Comparison between Observed Convective Cloud-Base Heights and Lifting Condensation Level for Two Different Lifted Parcels, Weather Forecast., 17, 885–890, https://doi.org/10.1175/1520-0434(2002)017<0885:CBOCCB>2.0.CO;2, 2002. 
Publications Copernicus
Short summary
It is useful to divide a cloud into two regions: core and margin. Three parameters used to define a core are compared: buoyancy (B), relative humidity (RH), and vertical velocity (W). Using theoretical arguments and simulations, we show that during most of a cloud's lifetime, the cores are subsets of one another: Bcore ⊆ RHcore ⊆ Wcore. Moreover, the core–shell cloud model applies to all core definitions. Our findings can serve as a benchmark in the partition the core and margin.
It is useful to divide a cloud into two regions: core and margin. Three parameters used to...
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