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The impact of aerosol on cloud water: a heuristic perspective
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2024
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Source: Atmospheric Chemistry and Physics, 24(23), 13403-13412
[PDF-2.42 MB]
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Journal Title:Atmospheric Chemistry and Physics
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Description:Aerosol–cloud interactions modulate the role of clouds in Earth's climate. We derive, evaluate, and apply a simple model to understand aerosol-mediated cloud water adjustments in stratocumulus based on only two prognostic equations for the integrated cloud water L and droplet number concentration N. The model is solved numerically and analytically and agrees well with documented large-eddy-simulation data and satellite retrievals. A tight relationship between adjustments at low and high N is found, revealing the influence of non-precipitation processes (primarily entrainment) on adjustments in precipitating clouds. Furthermore, it is shown that adjustments in non-precipitating clouds tend to be positively biased by external L or N perturbations, while adjustments in precipitating clouds are barely susceptible. By deliberately reducing the complexity of the underlying system, this study constitutes a way forward to facilitate process-level understanding of cloud water adjustments.
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Source:Atmospheric Chemistry and Physics, 24(23), 13403-13412
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DOI:
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ISSN:1680-7324
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Rights Information:CC BY
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Compliance:Submitted
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