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Showing 1–9 of 9 results
Advanced filters: Author: Martin Heinritzi Clear advanced filters

  • Aircraft measurements over the Amazon show that new particle formation in the upper troposphere emerges when isoprene, emitted by forests, undergoes oxidation in the presence of nitrogen oxides produced by lightning.

    • Joachim Curtius
    • Martin Heinritzi
    • Jos Lelieveld
    ResearchOpen Access
    Nature
    Volume: 636, P: 124-130

  • Iodic acid (HIO3) forms aerosols very efficiently, but its gas-phase formation mechanism is not well understood. Atmospheric simulation chamber experiments, quantum chemical calculations and kinetic modelling have now revealed that HIO3 forms as an early iodine oxidation product from hypoiodite. The mechanism explains field measurements and suggests a catalytic role for iodine in particle formation.

    • Henning Finkenzeller
    • Siddharth Iyer
    • Rainer Volkamer
    ResearchOpen Access
    Nature Chemistry
    Volume: 15, P: 129-135

  • Experiments performed in the CERN CLOUD chamber show that, under upper-tropospheric conditions, new atmospheric particle formation may be initiated by the reaction of hydroxyl radicals with isoprene emitted by rainforests.

    • Jiali Shen
    • Douglas M. Russell
    • Xu-Cheng He
    ResearchOpen Access
    Nature
    Volume: 636, P: 115-123

  • By performing experiments under upper tropospheric conditions, nitric acid, sulfuric acid and ammonia can form particles synergistically, at rates orders of magnitude faster than any two of the three components.

    • Mingyi Wang
    • Mao Xiao
    • Neil M. Donahue
    ResearchOpen Access
    Nature
    Volume: 605, P: 483-489

  • The growth of nucleated organic particles has been investigated in controlled laboratory experiments under atmospheric conditions; initial growth is driven by organic vapours of extremely low volatility, and accelerated by more abundant vapours of slightly higher volatility, leading to markedly different modelled concentrations of atmospheric cloud condensation nuclei when this growth mechanism is taken into account.

    • Jasmin Tröstl
    • Wayne K. Chuang
    • Urs Baltensperger
    ResearchOpen Access
    Nature
    Volume: 533, P: 527-531

  • Aerosol particles can form in the atmosphere by nucleation of highly oxidized biogenic vapours in the absence of sulfuric acid, with ions from Galactic cosmic rays increasing the nucleation rate by one to two orders of magnitude compared with neutral nucleation.

    • Jasper Kirkby
    • Jonathan Duplissy
    • Joachim Curtius
    ResearchOpen Access
    Nature
    Volume: 533, P: 521-526