Non-linear photochemical pathways in laser-induced atmospheric aerosol formation

  title={Non-linear photochemical pathways in laser-induced atmospheric aerosol formation},
  author={Denis Mongin and Jay G Slowik and Elise Schubert and J. Brisset and Nicolas Berti and Michel Moret and Andr{\'e} Stephan Henry Pr{\'e}v{\^o}t and Urs Baltensperger and J{\'e}r{\^o}me Kasparian and J. P. Wolf},
  journal={Scientific Reports},
We measured the chemical composition and the size distribution of aerosols generated by femtosecond-Terawatt laser pulses in the atmosphere using an aerosol mass spectrometer (AMS). We show that nitric acid condenses in the form of ammonium nitrate, and that oxidized volatile organics also contribute to particle growth. These two components account for two thirds and one third, respectively, of the dry laser-condensed mass. They appear in two different modes centred at 380 nm and 150 nm. The… 
Femtosecond filamentation induced particles and their cloud condensation nuclei activity
Picosecond laser-induced water condensation in a cloud chamber.
It was found that weaker ps laser pulses can also induce water condensation by exploding and breaking down ice crystals and/or water droplets into tiny particles although there was no formation of laser filament.
Photochemistry of Atmospheric Particles
Temporal evolution of condensation and precipitation induced by a 22-TW laser.
Water condensation and precipitation induced by 22-TW 800-nm laser pulses at 1 Hz in an open cloud chamber were investigated in a time-resolved manner. Two parts of precipitation in two independent
Laser vaporization of cirrus-like ice particles with secondary ice multiplication
It is concluded 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.
Laser-filamentation-induced water condensation and snow formation in a cloud chamber filled with different ambient gases.
The results show that filaments with higher laser absorption efficiency, which result in higher plasma density, are beneficial for triggering intense airflow and thus more water condensation and precipitation.
Femtosecond laser filament-assisted AgI-type pyrotechnic nucleant-induced water condensation in cloud chamber.
It is found that when 50-ml sample was irradiated by the laser filaments, the particles condensed on the glass slide are more soluble and slightly larger, compared to that without the irradiation of the laser filament.
Short-pulse lasers for weather control.
  • J. Wolf
  • Physics, Environmental Science
    Reports on progress in physics. Physical Society
  • 2018
Recent spectacular advances in filamentation of ultra-short TW-class lasers are reviewed both in the laboratory and in the field, their underlying mechanisms are revealed, and the applicability of using these new non-linear photonic catalysts for real scale weather control is discussed.
Femtosecond laser filament induced condensation and precipitation in a cloud chamber
It is believed that latent heat release during condensation /precipitation would enhance the air flow for mixing and result in supersaturation in which the background CCN’s would grow efficiently into water/ice/snow.
Detection of Trace Amounts of Volatile Organic Compounds via Laser-Induced Condensation
We present laser-induced condensation as a method for detecting of ultra-low concentrations of volatile organic compounds featuring a detection threshold well below 1 ppb. The method was tested in


Laser filament-induced aerosol formation
Abstract. Using the aerosol and cloud simulation chamber AIDA, we investigated the laser filament induced particle formation in ambient air, humid synthetic air, humid nitrogen, argon–oxygen mixture,
Field measurements suggest the mechanism of laser-assisted water condensation
It is shown, using field experiments conducted under various atmospheric conditions, that laser filaments can induce water condensation and fast droplet growth up to several μm in diameter in the atmosphere as soon as the relative humidity exceeds 70%.
Production of ozone and nitrogen oxides by laser filamentation
We have experimentally measured that laser filaments in air generate up to 1014, 3×1012, and 3×1013 molecules of O3, NO, and NO2, respectively. The corresponding local concentrations in the filament
Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene
The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3-22.8 ppbv of reacted -pinene. Most experiments were conducted using a continuous-flow
White-Light Filaments for Atmospheric Analysis
The mobile femtosecond-terawatt laser system, Teramobile, has been constructed to study the applications of white-light and nonlinear light detection and ranging applications for atmospheric trace-gas remote sensing or remote identification of aerosols.
Chemical and microphysical characterization of ambient aerosols with the aerodyne aerosol mass spectrometer.
A detailed discussion of the strengths and limitations of the AMS measurement approach is presented and how the measurements are used to characterize particle properties are reviewed to highlight the different applications of this instrument.
Oxidation Products of Biogenic Emissions Contribute to Nucleation of Atmospheric Particles
It is shown, in experiments performed with the CLOUD (Cosmics Leaving Outdoor Droplets) chamber at CERN, that sulfuric acid and oxidized organic vapors at atmospheric concentrations reproduce particle nucleation rates observed in the lower atmosphere.
Laser-induced water condensation in air
  • J. Kasparian, P. Rohwetter, J. Wolf
  • Physics
    2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)
  • 2011
Triggering rain on-demand is an old dream of mankind, with a huge potential socio-economical benefit. We demonstrate that water cloud condensation can be induced in the free, sub-saturated atmosphere
Laser-assisted water condensation in the atmosphere: a step towards modulating precipitation?
We review the recent results about laser-induced condensation based on self-guided filaments generated by ultrashort laser pulses. After recalling the physico-chemistry of cloud particle formation in
Cooperative effect of ultraviolet and near-infrared beams in laser-induced condensation
We demonstrate the cooperative effect of near infrared (NIR) and ultraviolet (UV) beams on laser-induced condensation. Launching a UV laser after a NIR pulse yields up to a 5-fold increase in the