Our understanding of the processes that control the burden and budget of tropospheric
ozone has changed dramatically over the last 60 years. Models are the key tools used to …

The role of ice in the formation of chemically active halogens in the environment requires a
full understanding because of its role in atmospheric chemistry, including controlling the …

We present an updated mechanism for tropospheric halogen (Cl+ Br+ I) chemistry in the
GEOS-Chem global atmospheric chemical transport model and apply it to investigate …

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 …

We present a comprehensive simulation of tropospheric chlorine within the GEOS-Chem
global 3-D model of oxidant–aerosol–halogen atmospheric chemistry. The simulation …

The bromine atom (Br•) has been known to destroy ozone (O3) and accelerate the
deposition of toxic mercury (Hg). However, its abundance and sources outside the polar …

We present a new model for the global tropospheric chemistry of inorganic bromine (Br y)
coupled to oxidant-aerosol chemistry in the GEOS-Chem chemical transport model (CTM) …

This paper discusses the chemical composition of frost flowers and their accompanying
slush layers and the evidence for their role as a salt source in processes important to …

Aircraft and satellite observations indicate the presence of ppt (ppt≡ pmol/mol) levels of BrO
in the free troposphere with important implications for the tropospheric budgets of ozone …

We use GEOS-Chem chemical transport model simulations of sulfate–ammonium aerosol
data from the NASA ARCTAS and NOAA ARCPAC aircraft campaigns in the North American …