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| Titel |
Spatio-temporal variations in marine ice nuclei concentration |
| VerfasserIn |
André Welti, Mareike Löffler, Frank Stratmann |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250149372
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| Publikation (Nr.) |
 EGU/EGU2017-13713.pdf |
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| Zusammenfassung |
| Ship and ground based measurements of ice nuclei concentrations are analyzed for their spatial and temporal variation. Ship based measurements extending over a wide area provide a measure of variation with geographic position and stationary measurements provide data for long term temporal variability. The field data covers a large temperature range of immersion freezing from -5°C to -40°C.
In the data it is found that the spatial variability is surprisingly small in a marine environment. The influence of heavily populated areas and dust from deserts is found to be limited to temperatures below -25°C and to elevate ice nuclei concentrations only regionally. In the presented measurements, temporal variability is larger than changes with location. Overall, measurements can be summarized by a common frequency distributions of concentration over a broad spatial and temporal range. Frequency distributions of measured concentrations at any temperature are positively skewed and can be approximated by log-normal distributions. |
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