Samuel R. Hall

TL;DR: In this article, the authors analyzed more than 500 terrestrial (melted) snow samples near Barrow, AK between February and April 2009 for light absorption, as well as H2O2 and inorganic anion concentrations.

TL;DR: In this article, the authors compare the measured photolysis frequencies to the TUV radiative transfer model, assuming clear skies, demonstrate some expected differences in this complex radiation environment, while in general the agreement between the measurements and the model is within 15%.

TL;DR: The work highlights that the gas-phase production of glyoxal represents a large uncertainty in quantifying its contribution to SOA, and finds that AM3B shows better agreement on both formaldehyde and the correlation between Glyoxal and formaldehyde, resulting from the suppression of δ-isoprene peroxy radicals (δ-ISOPO2).

TL;DR: In this paper, aircraft observations acquired over a forest in the southeast U.S. were used to calculate eddy covariance fluxes for a suite of reactive gases and apply the synergistic information derived from this analysis to quantify emission and deposition fluxes, oxidant concentrations, aerosol uptake coefficients, and other key parameters.

TL;DR: It is proposed that peroxyacetic acid (PAA) is an ideal indicator of the rapid CH3CHO production in the remote troposphere and represents a missing sink of hydroxyl radicals (and halogen radical) in current chemistry-climate models.