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Journal article

A simple relationship between cloud drop number concentration and precursor aerosol concentration for the regions of Earth's large marine stratocumulus decks

Hegg D, Covert D, Jonsson H, Woods R...(+4 more)

Atmospheric Chemistry and Physics, vol. 12, issue 3 (2012) pp. 1229-1238

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Abstract

Aircraft-based measurements of cloud condensation nuclei (CCN),
accumulation mode and Aitken mode number concentrations, cloud drop
number concentration (CDNC), and selected ancillary measurements are
presented for the three large, semi-permanent marine stratocumulus decks
of the earth (in the Pacific offshore of California and Chile and in the
Atlantic offshore of Namibia). Based on these data, a simple linear
relationship between CDNC and the accumulation mode number concentration
(AMNC) is derived via regression. The slope of the regression is 0.72
+/- 0.04 with an R-2 of 0.90, higher than those found for CDNC-CCN
linear regressions. Explanations of the relatively favorable CDNC-AMNC
relationship and its utility for climate studies are discussed.

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