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  1. Environmental & Climate Sciences Department Seminar

    "Observational insight into the relationships between large-scale conditions and the properties of boundary-layer precipitation"

    Presented by Katia Lamer, City College of New York (CCNY)

    Thursday, October 24, 2019, 11 am
    Large Conference Room, Bldg. 490

    Hosted by: Andy Vogelmann

    Reanalysis and observations collected at ENA are analyzed to document the properties of rain and boundary layer clouds during general subsidence conditions and following cold front passages. Clouds in the wake of cold fronts exhibit on average a 10% higher propensity to precipitate and higher rain-to-cloud fraction than clouds found in general subsidence conditions. The identification of monotonic relationships between rain-to-cloud fraction with surface forcing and boundary layer stability parameters as well as between virga base height with stability and humidity measures further supports that large-scale conditions impact precipitation variability. That being said, these relationships are less clear than those established between cloud and rain properties suggesting that cloud macrophysics have a more direct impact on the properties of rain than the large-scale environment.

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