Observations of secondary ice formation in the Deep Convective Microphysics Experiment (DCMEX)
| Autor: | Hu, Kezhen, Lloyd, Gary, Wu, huihui, bower, Keith, Flynn, Michael, Marsden, Nicholas, Choularton, Thomas, blyth, Alan, Coe, Hugh, Connolly, Paul, Nott, Graeme, Reed, Chris, Schledewitz, Waldemar, Gallagher, Martin |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| Popis: | The radiative properties and lifetime of mixed-phase clouds are strongly influenced by ice formation, and the formation of secondary ice in clouds is one of the longest-standing problems in cloud physics. In DCMEX we conducted multiple flights over New Mexico in the Magdalena Mountain region to provide high-resolution cloud microphysical and aerosol measurements to provide information on the temporal and spatial distribution of ice phase evolution and the linkage between convective cloud thermodynamic and secondary ice processes. We used a combination of high-resolution instruments (including 3VCPI, 2DS, HVPS, and CDP) to provide measurements of the evolution of cloud particle and precipitation concentrations, sizes and morphology to identify and assess primary and secondary ice production contributions as well as where precipitation particles first form and how they develop. The initial results suggest the principal secondary ice production mechanism in these clouds was ice splinter production during riming (Hallet-Mossop) but other production mechanisms were also contributed. Our next step is to combine these data with the cloud thermodynamic background confirming the occurrence of secondary ice and identifying the conditions for the formation of secondary ice. In addition, the aerosol data including cloud particle chemical composition will be used to investigate and quantify their contribution to primary ice formation. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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