Long-term time series of Arctic tropospheric BrO derived from UV-VIS satellite remote sensing and its relation to first-year sea ice
Bromine molecules, released from the cryosphere, play an important role for the oxidizing capacity of the Arctic, as they deplete ozone, forming bromine monoxides (BrO). A new study presents the first long-term consistent tropospheric BrO dataset for the Arctic, retrieved from four satellite remote sensing instruments. It shows an increase of tropospheric BrO of approximately 1.5% per year during polar springs, under the impact of climate warming. It infers a moderate correlation to first year sea ice extent, suggesting that the increased formation of young sea ice plays a role to the enhanced appearance of BrO plumes.
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