Extensive halogen-mediated ozone destruction over the tropical Atlantic Ocean

Katie A. Read, Anoop S. Mahajan, Lucy J. Carpenter (), Mathew J. Evans, Bruno V. E. Faria, Dwayne E. Heard, James R. Hopkins, James D. Lee, Sarah J. Moller, Alastair C. Lewis, Luis Mendes, James B. McQuaid, Hilke Oetjen, Alfonso Saiz-Lopez, Michael J. Pilling and John M. C. Plane ()
Additional contact information
Katie A. Read: University of York, Heslington, York YO10 5DD, UK
Anoop S. Mahajan: School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
Lucy J. Carpenter: University of York, Heslington, York YO10 5DD, UK
Mathew J. Evans: School of Earth and the Environment (SEE), University of Leeds, LS2 9JT, UK
Bruno V. E. Faria: Instituto Nacional de Meteorologia Geofísica (INMG), Delegação de São Vicente, Monte, CP 15, Mindelo, Cape Verde
Dwayne E. Heard: School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
James R. Hopkins: National Centre for Atmospheric Science (NCAS), University of York, Heslington, York YO10 5DD, UK
James D. Lee: National Centre for Atmospheric Science (NCAS), University of York, Heslington, York YO10 5DD, UK
Sarah J. Moller: University of York, Heslington, York YO10 5DD, UK
Alastair C. Lewis: National Centre for Atmospheric Science (NCAS), University of York, Heslington, York YO10 5DD, UK
Luis Mendes: Instituto Nacional de Meteorologia Geofísica (INMG), Delegação de São Vicente, Monte, CP 15, Mindelo, Cape Verde
James B. McQuaid: School of Earth and the Environment (SEE), University of Leeds, LS2 9JT, UK
Hilke Oetjen: School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
Alfonso Saiz-Lopez: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA
Michael J. Pilling: School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
John M. C. Plane: School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK

Nature, 2008, vol. 453, issue 7199, 1232-1235

Abstract: Tropical ozone destruction: Halogens tidy up Tropospheric ozone is an important greenhouse gas in addition to its influence on air quality, on the photochemical processing of atmospheric chemicals and on ecosystem viability. Increasing tropospheric ozone levels over the past 150 years have led to a significant climate perturbation and a full understanding of the factors controlling the tropospheric ozone budget is required. The tropical marine boundary layer is the most important global region for loss of ozone, because of its high water vapour content, high solar radiation levels and large geographical extent. Surface atmospheric observations in this region are extremely sparse, hence the importance of a new year-round dataset from Cape Verde Observatory in the tropical North Atlantic Ocean. The observations reveal that the photochemical destruction rate of ozone in the tropical marine boundary layer is about 50% greater than predicted by current global models, and that this destruction is caused by halogen chemistry.

Date: 2008
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DOI: 10.1038/nature07035

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