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Ice nucleation active particles are efficiently removed by precipitating clouds
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
ID 3289568
Author(s) Stopelli, Emiliano; Conen, Franz; Morris, Cindy E.; Herrmann, Erik; Bukowiecki, Nicolas; Alewell, Christine
Author(s) at UniBasel Conen, Franz
Alewell, Christine
Stopelli, Emiliano
Year 2015
Title Ice nucleation active particles are efficiently removed by precipitating clouds
Journal Scientific Reports
Volume 5
Pages / Article-Number 16433
Keywords ice nucleation, isotopes, precipitation, feedbacks, landuse
Abstract Ice nucleation in cold clouds is a decisive step in the formation of rain and snow. Observations and modelling suggest that variations in the concentrations of ice nucleating particles (INPs) affect timing, location and amount of precipitation. A quantitative description of the abundance and variability of INPs is crucial to assess and predict their influence on precipitation. Here we used the hydrological indicator δ18O to derive the fraction of water vapour lost from precipitating clouds and correlated it with the abundance of INPs in freshly fallen snow. Results show that the number of INPs active at temperatures ≥ -10 °C (INPs-10) halves for every 10 % of vapour lost through precipitation. Particles of similar size (> 0.5 µm) halve in number for only every 20 % of vapour lost, suggesting effective microphysical processing of INPs during precipitation. We show that INPs active at moderate supercooling are rapidly depleted by precipitating clouds, limiting their impact on subsequent rainfall development in time and space.
Publisher Nature Publishing Group
ISSN/ISBN 2045-2322
Full Text on edoc No
Digital Object Identifier DOI 10.1038/srep16433
PubMed ID
ISI-Number WOS:000364384700001
Document type (ISI) Journal Article

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