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Showing 1–6 of 6 results
Advanced filters: Author: Yee Jun Tham Clear advanced filters

  • Measurements show that night-time production of atmospheric nitrate radicals increased in China but decreased in the European Union and the United States from 2014 to 2019. This suggests the increasing contribution of night-time atmospheric oxidation in China to air pollution.

    • Haichao Wang
    • Haolin Wang
    • Yuanhang Zhang
    Research
    Nature Geoscience
    Volume: 16, P: 217-223

  • Observations are reported of HClO3 and HClO4 in the atmosphere and their widespread occurrence over the pan-Arctic during spring, providing further insights into atmospheric chlorine cycling in the polar environment.

    • Yee Jun Tham
    • Nina Sarnela
    • Alfonso Saiz-Lopez
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-10

  • 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

  • Measurements in the CLOUD chamber at CERN show that the rapid condensation of ammonia and nitric acid vapours could be important for the formation and survival of new particles in wintertime urban conditions, contributing to urban smog.

    • Mingyi Wang
    • Weimeng Kong
    • Neil M. Donahue
    ResearchOpen Access
    Nature
    Volume: 581, P: 184-189