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Laser vaporization of cirrus-like ice particles with secondary ice multiplication

Matthews, M.; Pomel, F.; Wender, C.; Kiselev, A.; Duft, D.; Kasparian, J.; Wolf, J.-P.; Leisner, T.

Abstract (englisch):
We investigate the interaction of ultrashort laser filaments with individual 90-μm ice particles, representative of cirrus particles. The ice particles fragment under laser illumination. By monitoring the evolution of the corresponding ice/vapor system at up to 140,000 frames per second over 30 ms, we conclude that a shockwave vaporization supersaturates the neighboring region relative to ice, allowing the nucleation and growth of new ice particles, supported by laser-induced plasma photochemistry. This process constitutes the first direct observation of filament-induced secondary ice multiplication, a process that strongly modifies the particle size distribution and, thus, the albedo of typical cirrus clouds.

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Aerosolforschung (IMK-AAF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1126/sciadv.1501912
ISSN: 2375-2548
KITopen ID: 1000066088
HGF-Programm 12.04.02; LK 01
Erschienen in Science advances
Band 2
Heft 5
Seiten e1501912
Schlagworte ultrashort laser, ultrafast optics, laser filamentation, ice particle, cirrus, Nucleation
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