Ronald C. Cohen

TL;DR: In this article, a strong temperature dependence of oxygen K-edge x-ray absorption fine structure features was observed for supercooled and normal liquid water droplets prepared from the breakup of a liquid microjet.

TL;DR: It is shown here that many of the features of the Raman spectrum that are considered to be hallmarks of a multistate system, including the asymmetric band profile, the isosbestic (temperature invariant) point, and van't Hoff behavior, actually result from a continuous distribution.

TL;DR: In this paper, it was shown that surface cooling of the liquid is a crucial variable affecting fractionation from evaporating water that has not been properly considered before, including the effects of evaporative surface cooling reconciles observed D/H fractionation with kinetic theory and removes the need to invoke an unusual size for the HDO molecule.

TL;DR: In this article, in situ measurements of the concentrations of OH, HO_2, ClO, BrO, NO, and NO_2 demonstrate the predominance of odd-hydrogen and halogen free-radical catalysis in determining the rate of removal of ozone in the lower stratosphere during May 1993.

TL;DR: In this paper, an ensemble of aircraft, satellite, sonde, and surface observations for April-May 2006 (NASA/INTEX-B aircraft campaign) were used to better understand the mechanisms for transpacific ozone pollution and its implications for North American air quality.