Ozone-depleting bromine sourced from surface snow
Nature Geoscience
2013년4월15일
Surface snow serves as a source of the chemical bromine to the Arctic atmosphere in polar spring, reports a study published online this week in Nature Geoscience. The findings suggest that surface snow contributes to the destruction of atmospheric ozone in the Arctic following polar sunrise.
Kerri Pratt and colleagues assessed the potential for bromine production from various icy surfaces in Alaska. They find that snow that accumulates on first-year sea ice and tundra releases significant quantities of bromine, but only in the presence of sunlight. They suggest that this sunlight-induced production of bromine in surface snow contributes to the episodic depletion of atmospheric ozone at the poles.
In an accompanying News and Views article, Jon Abbatt says that the “findings lend much more confidence to the suggestion that halogens released from icy surfaces help to explain polar ozone depletion events”.
doi: 10.1038/ngeo1779
리서치 하이라이트
-
8월18일
Environment: Protecting global forest biodiversityNature
-
8월17일
Climate change: North Atlantic hurricane season starting earlierNature Communications
-
8월17일
Climate change: Energy institutions’ decarbonization scenarios evaluated against the Paris AgreementNature Communications
-
8월16일
Food: Modelling global famine and associated deaths from nuclear weapon detonationNature Food
-
8월12일
Climate change: The Arctic is warming nearly four times faster than the rest of the worldCommunications Earth & Environment
-
8월11일
Ecology: Forest responses to climate changeNature