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- W4384199394 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> In-situ measurements of liquid cloud and precipitation drop size distributions from aircraft-mounted probes are used to examine the relationship of the width of drop size distributions to cloud drop number. The width of the size distribution is quantified in terms of the parameter <em>k</em>=(<em>r<sub>v </sub></em>/<em>r<sub>e</sub></em>)<sup>3</sup>, where <em>r<sub>v</sub></em> is the volume mean radius and <em>r<sub>e</sub></em> is the effective radius of the distributions. We find that on small spatial scales (~100 m), <em>k</em> is positively correlated with cloud drop number. This correlation is robust across a variety of campaigns using different probe technology. A new parameterization of <em>k</em> versus cloud drop number is developed. This new parameterization of <em>k</em> is used in an algorithm to derive cloud drop number in liquid phase clouds using satellite measurements of cloud optical depth and effective radius from the MODIS (Moderate Resolution Imaging Spectroradiometer) sensor on Aqua. This algorithm is compared to the standard approach to derive drop number concentration that assumes a fixed value for <em>k</em>. The general tendency of the parameterization is to narrow the distribution of derived number concentration. The new parameterization generally increases the derived number concentration over ocean, where <em>N</em> is low, and decreases it over land, where <em>N</em> is high. Regional biases are as large as 20 % with the magnitude of the bias closely tracking the regional mean number concentration. Interestingly, biases are smallest in regions of frequent stratocumulus cloud cover, which are a regime of significant interest for study of the aerosol indirect effect on clouds." @default.
- W4384199394 created "2023-07-14" @default.
- W4384199394 date "2023-07-13" @default.
- W4384199394 modified "2023-09-29" @default.
- W4384199394 title "Comment on egusphere-2023-1176" @default.
- W4384199394 doi "https://doi.org/10.5194/egusphere-2023-1176-rc2" @default.
- W4384199394 hasPublicationYear "2023" @default.
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