Articles | Volume 18, issue 8
https://doi.org/10.5194/acp-18-5307-2018
https://doi.org/10.5194/acp-18-5307-2018
Research article
 | 
19 Apr 2018
Research article |  | 19 Apr 2018

Concentration and variability of ice nuclei in the subtropical maritime boundary layer

André Welti, Konrad Müller, Zoë L. Fleming, and Frank Stratmann

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Cited articles

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Ansmann, A., Tesche, M., Seifert, P., Althausen, D., Engelmann, R., Fruntke, J., Wandinger, U., Mattis, I., and Müller, D.: Evolution of the ice phase in tropical altocumulus: SAMUM lidar observations over Cape Verde, J. Geophys. Res., 114, D17208, https://doi.org/10.1029/2008JD011659, 2009. a, b, c
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We report on ambient concentrations of ice nuclei, measured on the Cabo Verde islands. Concentrations are found to exponentially increase by 7 orders of magnitude from −5 to −38 °C. At each temperature, the frequency distribution of observed concentrations can be described by a lognormal distribution, typical for random dilution of substances during transport. Random dilution is found to account for larger fluctuations in IN concentration than seasonal changes and changes in air mass origin.
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