1. BACKGROUND 1.1. Why Condensed Matter Matters: Types and Significance of
Condensed Matter and Surfaces Encountered in the Atmospheric Environment The …

In the past 40 years, atmospheric chemists have come to realize that halogens exert a
powerful influence on the chemical composition of the troposphere and through that …

During springtime in the polar regions, unique photochemistry converts inert halide salt ions
(eg Br−) into reactive halogen species (eg Br atoms and BrO) that deplete ozone in the …

It has been shown that sunlit snow and ice plays an important role in processing
atmospheric species. Photochemical production of a variety of chemicals has recently been …

The atmospheric budget and distribution of acetone are investigated by using a priori
estimates of sources and sinks to constrain a global three‐dimensional atmospheric model …

The cryosphere is an important component of global organic contaminant cycles. Snow is an
efficient scavenger of atmospheric organic pollutants while a seasonal snowpack, sea ice …

Hydrogen peroxide (HOOH) in ice and snow is an important chemical tracer for the oxidative
capacities of past atmospheres. However, photolysis in ice and snow will destroy HOOH and …

Chlorine radicals can function as a strong atmospheric oxidant,,, particularly in polar
regions, where levels of hydroxyl radicals are low. In the atmosphere, chlorine radicals …

There are few long-term datasets of volatile organic compounds (VOCs) in the High Arctic.
Furthermore, knowledge about their source regions remains lacking. To address this matter …

Recent measurements of reactive chemical species in snow and firn at polar sites have
served to underscore the importance of air–snow transfer processes in understanding …