Halogen chemistry is well known for ozone destruction in the stratosphere, however reactive
halogens also play an important role in the chemistry of the troposphere. In the last two …

Observations from the last decade suggest an important role of sea ice in the global
biogeochemical cycles, promoted by (i) active biological and chemical processes within the …

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 …

Recent studies have shown that climate change is already having significant impacts on
many aspects of transport pathways, speciation and cycling of mercury within Arctic …

The NASA Arctic Research of the Composition of the Troposphere from Aircraft and
Satellites (ARCTAS) mission was conducted in two 3-week deployments based in Alaska …

Following the springtime polar sunrise, ozone concentrations in the lower troposphere
episodically decline to near-zero levels. These ozone depletion events are initiated by an …

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 …

Mercury in the Arctic is an important environmental and human health issue. The reliance of
Northern Peoples on traditional foods, such as marine mammals, for subsistence means that …

Sea salt aerosols (SSA) are generated via air bubbles bursting at the ocean surface as well
as by wind mobilization of saline snow and frost flowers over sea-ice-covered areas. The …

We present results from multiaxis differential optical absorption spectroscopy (MAX‐DOAS)
and long‐path DOAS (LP‐DOAS) measurements performed at the North Slope of Alaska …