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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure: Middle atmosphere: composition and chemistry
  • Atmospheric Composition and Structure: Instruments and techniques
  • Atmospheric Composition and Structure: Constituent sources and sinks

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 33, L20817, 5 PP., 2006
doi:10.1029/2006GL026930

EOS Microwave Limb Sounder observations of upper stratospheric BrO: Implications for total bromine

Nathaniel J. Livesey

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Laurie J. Kovalenko

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Columbus Technologies and Services Inc., Pasadena, California, USA

Ross J. Salawitch

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Ian A. MacKenzie

University of Edinburgh, Edinburgh, UK

Martyn P. Chipperfield

Institute of Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, UK

William G. Read

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Robert F. Jarnot

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Joe W. Waters

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

This paper describes new total stratospheric inorganic bromine (Bry) abundance estimates inferred from the first global observations of upper stratospheric BrO, made by the EOS Microwave Limb Sounder on the Aura satellite. Our ‘best estimate’ of total upper stratospheric bromine loading (based on JPL-2002 kinetics with the addition of a BrONO2 + O reaction) is 18.6 ± 5.5 pptv, for the period September 2004 to August 2005, from 55° S to 55° N. This implies a contribution of 3.0 ± 5.5 pptv from sources other than long lived CH3Br and halons. The possibility of such other sources has been raised by balloon, aircraft and satellite observations of BrO in the lower and middle stratosphere. These upper stratospheric observations provide new information to help resolve the current uncertainty in stratospheric bromine loading. The abundance of bromine, particularly in the lower stratosphere, is a significant factor in the budget of stratospheric O3.

Received 17 May 2006; accepted 12 September 2006; published 31 October 2006.

Citation: Livesey, N. J., L. J. Kovalenko, R. J. Salawitch, I. A. MacKenzie, M. P. Chipperfield, W. G. Read, R. F. Jarnot, and J. W. Waters (2006), EOS Microwave Limb Sounder observations of upper stratospheric BrO: Implications for total bromine, Geophys. Res. Lett., 33, L20817, doi:10.1029/2006GL026930.

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