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Title

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

Authors
Matthews, Mary
Wender, C.
Kiselev, A.
Duft, D.
Leisner, T.
Published in Science Advances. 2016, vol. 2, no. 5, p. e1501912
Abstract 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/vapour system at up to 140,000 frames per second over 30 ms, we conclude that a shockwave vaporization supersaturates the neighbouring 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 (FISIM), a process that strongly modifies the particle size distribution, hence the albedo, of typical cirrus clouds.
Keywords AerosolsCirrusLaser femtosecondeFilamentation
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Other version: http://advances.sciencemag.org/cgi/doi/10.1126/sciadv.1501912
Structures
Research groups ISE Pôle Sciences
ISE Climat
Projects FP7: FILATMO
FNS: Marie Heim-Vogtlin grant no. S17982, and NCCR (National Center of Competence in Research) “MUST” (Molecular Ultrafast Science and Technology)
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MATTHEWS, Mary et al. Laser vaporization of cirrus-like ice particles with secondary ice multiplication. In: Science Advances, 2016, vol. 2, n° 5, p. e1501912. https://archive-ouverte.unige.ch/unige:83817

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Deposited on : 2016-05-24

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