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. 2012 Sep 13;370(1974):4217–4262. doi: 10.1098/rsta.2012.0086

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This journal is © 2012 The Royal Society

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Figure 1. — (a) Map of MODIS-derived annual mean cloud droplet concentration, N₀, for stratiform marine warm clouds. To be included in the annual mean, the daily warm cloud fraction in 1×1^° boxes must exceed 50% to capture primarily marine stratocumulus clouds. (b) Cumulative distribution of daily 1×1^° droplet number, N₀, from MODIS for all ocean points. (c) A comparison of MODIS and C-130 aircraft-measured cloud droplet concentration estimates from the VOCALS regional experiment during October/November 2008 off the Chilean coast [18], for longitudes 70–77.5^° W (more polluted) and 77.5–85^° W (more pristine). There is good agreement between in situ and satellite-derived values that lends weight to the use of these data over the global oceans.