The effect of CCN regeneration on the evolution of stratocumulus cloud layers

Kogan, Yefim L.; Lilly, Douglas K.; Kogan, Z. N.; Filyushkin, V.

doi:10.1016/0169-8095(94)90017-5

Cited by 29 publications

(9 citation statements)

References 15 publications

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“…Martin et al, 1995;Kogan et al, 1994;Stull, 1988). The turbulent mixing process which is a major driving force in maintaining the stratocumulus results in a cloud consisting of a collection of rising and falling air parcels, the rising parcels associated with detraining of air at cloud top.…”

Section: Discussionmentioning

confidence: 99%

Observations of the impact of cloud processing on aerosol light-scattering efficiency

Hegg¹,

Covert²,

Jonsson³

et al. 2004

Tellus B: Chemical and Physical Meteorology

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A B S T R A C T Airborne data are presented on the impact of cloud processing on the aerosol mass light-scattering efficiency. The measurements, on marine stratocumulus, suggest that cloud processing significantly enhanced the mass light-scattering efficiency in three of the five cases analysed. Enhancements were of the order of 10% for air detraining from the cloud deck relative to non-detraining air. A diagnostic modelling analysis suggested that the observed enhancements were consistent with the previously proposed explanation of in-cloud sulfate production in the particle size range for efficient light scattering.

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Section: Discussionmentioning

confidence: 99%

Observations of the impact of cloud processing on aerosol light-scattering efficiency

Hegg¹,

Covert²,

Jonsson³

et al. 2004

Tellus B: Chemical and Physical Meteorology

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“…Because this fundamental process plays a major role in the energy and material balance of marine stratocumulus, it certainly affects cloud microphysics and potentially impacts the extent and duration of these clouds. This theme, and variants on it, have been pursued in a number of more recent studies [e.g., Baker and Charlson, 1990;Kogan et al, 1994;Boers, 1995;Feingold et al, 1997].…”

Section: Introductionmentioning

confidence: 99%

Dependence of marine stratocumulus formation on aerosols

Hegg

1999

Geophysical Research Letters

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Abstract. A theoretical assessment is made of the impact of initial cloud condensation nuclei concentrations on the formation and stability of marine stratocumulus. It is found that the initial CCN concentration, through modulation of the drizzle process, has significant impact on the formation and stability of stratocumulus cloud layers for low CCN levels. The low levels examined are typical of both preindustrial oceanic areas in the North Pacific and the Southern Ocean today.

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“…(iii) Once activated, the diameter of hydrometeors range from 1 µm after activation up to 8 mm for the biggest drops. Accurate description of the hydrometeor size distribution thus calls for an additional large number of model variables, namely from 50 to 200 size bins (Kogan et al, 1994;Liu et al, 2000;Feingold et al, 1994Feingold et al, , 1996Feingold et al, , 1997Stevens et al, 1996Stevens et al, , 1998Khairoutdinov and Kogan, 2000, referred hereafter to as KK00; Feingold and Kreidenweis, 2002;Jiang et al, 2002). Therefore, microphysical processes are simulated in details using box models with prescribed dynamics (Mordy, 1959;Fitzgerald, 1974;Feingold and Kreidenweis, 2000;Feingold and Chuang, 2002), but their implementation in multidimensional models is numerically very costly, and thus requires drastic simplifications.…”

Section: Introductionmentioning

confidence: 99%

Relationship between drizzle rate, liquid water path and droplet concentration at the scale of a stratocumulus cloud system

2008

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Abstract. The recent ACE-2, EPIC and DYCOMS-II field experiments showed that the drizzle precipitation rate of marine stratocumulus scales with the cloud geometrical thickness or liquid water path, and the droplet concentration, when averaged over a domain typical of a GCM grid. This feature is replicated here with large-eddy-simulations using stateof-the-art bulk parameterizations of precipitation formation in stratocumulus clouds. The set of numerical simulations shows scaling relationships similar to the ones derived from the field experiments, especially the one derived from the DYCOMS-II data set. This result suggests that the empirical relationships were not fortuitous and that they reflect the mean effect of cloud physical processes. Such relationships might be more suited to GCM parameterizations of precipitation from shallow clouds than bulk parameterizations of autoconversion, that were initially developed for cloud resolving models.

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The effect of CCN regeneration on the evolution of stratocumulus cloud layers

Cited by 29 publications

References 15 publications

Observations of the impact of cloud processing on aerosol light-scattering efficiency

Observations of the impact of cloud processing on aerosol light-scattering efficiency

Dependence of marine stratocumulus formation on aerosols

Relationship between drizzle rate, liquid water path and droplet concentration at the scale of a stratocumulus cloud system

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