Skip to Main content Skip to Navigation
Journal articles

Polar nighttime chemistry produces intense reactive bromine events

Abstract : By examining the origin of air masses that arrive at Utqiaġvik (formerly Barrow) Alaska soon after polar sunrise (late January/early February), we identified periods when air arriving at Utqiaġvik had previously resided primarily at higher latitudes in near total darkness. Upon illumination, these air masses produced high concentrations of reactive bromine, which was detected by differential optical absorption spectroscopy (DOAS) as bromine monoxide (BrO). These observations are consistent with nighttime production of a photolabile reactive bromine precursor (e.g. Br2 or BrCl). A large polar‐night source of photolabile reactive bromine precursors would contribute seed reactive bromine to daytime reactive bromine events and could export reactive halogens to lower latitudes and the free troposphere.
Complete list of metadata

Cited literature [46 references]  Display  Hide  Download
Contributor : Catherine Cardon Connect in order to contact the contributor
Submitted on : Thursday, September 3, 2020 - 3:25:21 PM
Last modification on : Friday, December 3, 2021 - 11:42:49 AM
Long-term archiving on: : Friday, December 4, 2020 - 5:02:31 PM


Publisher files allowed on an open archive



W. R. Simpson, U. Friess, Jennie L. Thomas, J. Lampel, U. Platt. Polar nighttime chemistry produces intense reactive bromine events. Geophysical Research Letters, American Geophysical Union, 2018, 45 (18), pp.9987-9994. ⟨10.1029/2018GL079444⟩. ⟨insu-01877525⟩



Record views


Files downloads