Journal Highlights

Researchers take on atmospheric effects of Arctic snowmelt

Blog— 

Researchers at the University of Alaska Fairbanks’ Geophysical Institute are exploring the changing chemistry of the Arctic’s atmosphere to help answer the question of what happens as snow and ice begin to melt.

The research is concerned with the Arctic’s reactive bromine season, the period of time when bromine is consuming ozone, producing bromine monoxide and oxidizing mercury.

“There’s a really profound difference between solid water and liquid water in terms of reactivity,” said William Simpson, an atmospheric chemist at the University of Alaska Fairbanks and lead author of a new study detailing the research in the Journal of Geophysical Research: Atmospheres, a journal of the American Geophysical Union. “Because the reactive bromine season ends when snowpack begins to melt, “earlier melt is changing what is happening in the atmosphere.”…More


Editor’s Highlight—New findings improve our ability to understand and model snow chemistry

This paper correlates the factors that control the seasonal dependence of bromine monoxide in the Arctic springtime boundary layer with the onset of snow melt. This is the first field evidence to show that the physical state of the surfaces where reaction take place has an effect on reaction rates and products. When the surfaces are ice, reactions take place; when the ice surfaces melt, no detectable reaction occurs. This has major bearing on our ability to understand and model snow chemistry.