Boundary layer halogens in coastal Antarctica

Saiz-Lopez, Alfonso; Mahajan, Anoop S.; Salmon, Rhian A.; Bauguitte, Stephane J.; Jones, Anna E. ORCID: https://orcid.org/0000-0002-2040-4841; Roscoe, Howard K.; Plane, John M.C.. 2007 Boundary layer halogens in coastal Antarctica. Science, 317 (5836). 348-351. 10.1126/science.1141408

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Abstract/Summary

Halogens influence the oxidizing capacity of Earth's troposphere, and iodine oxides form ultrafine aerosols, which may have an impact on climate. We report year-round measurements of boundary layer iodine oxide and bromine oxide at the near-coastal site of Halley Station, Antarctica. Surprisingly, both species are present throughout the sunlit period and exhibit similar seasonal cycles and concentrations. The springtime peak of iodine oxide ( 20 parts per trillion) is the highest concentration recorded anywhere in the atmosphere. These levels of halogens cause substantial ozone depletion, as well as the rapid oxidation of dimethyl sulfide and mercury in the Antarctic boundary layer.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1126/science.1141408
Programmes:	BAS Programmes > Antarctic Funding Initiative Projects
ISSN:	0036-8075
NORA Subject Terms:	Atmospheric Sciences Chemistry
Date made live:	21 Oct 2011 09:50 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/11931

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