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AGU: Geophysical Research Letters

 

Keywords

  • O3 migration
  • cloud convection
  • lightning

Index Terms

  • Atmospheric Composition and Structure: Troposphere: constituent transport and chemistry
  • Atmospheric Composition and Structure: Troposphere: composition and chemistry
  • Atmospheric Composition and Structure: Cloud physics and chemistry
  • Global Change: Remote sensing
  • Atmospheric Composition and Structure: Constituent sources and sinks

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L04818, 5 PP., 2008
doi:10.1029/2007GL032276

Spring to summer northward migration of high O3 over the western North Atlantic

Yunsoo Choi

Department of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA

Yuhang Wang

Department of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA

Qing Yang

Department of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA

Derek Cunnold

Department of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA

Tao Zeng

Department of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA

Changsub Shim

Jet Propulsion Laboratory, Pasadena, California, USA

Ming Luo

Jet Propulsion Laboratory, Pasadena, California, USA

Annmarie Eldering

Jet Propulsion Laboratory, Pasadena, California, USA

Eric Bucsela

NASA GSFC, Greenbelt, Maryland, USA

James Gleason

NASA GSFC, Greenbelt, Maryland, USA

Tropospheric O3 columns retrieved from OMI and MLS measurements, NO2 columns from OMI, and upper tropospheric O3 concentrations from TES over North America and the western North Atlantic from April to August 2005 are analyzed using the Regional chEmical and trAnsport Model (REAM). Large enhancements of column and upper tropospheric O3 over the western North Atlantic comparable to those over the eastern United States are found in the satellite measurements and REAM simulations. The O3 enhancement region migrates northward from spring to summer. Model analysis indicates that the northward migration is driven by seasonal shifts of O3 transported from the stratosphere and that produced through photochemistry from surface emissions and lightning NOx. As their uncertainties improve, satellite measurements of O3 and its precursors will be able to provide more quantitative constraints on pollutant outflow from the continents.

Received 6 October 2007; accepted 30 January 2008; published 29 February 2008.

Citation: Choi, Y., Y. Wang, Q. Yang, D. Cunnold, T. Zeng, C. Shim, M. Luo, A. Eldering, E. Bucsela, and J. Gleason (2008), Spring to summer northward migration of high O3 over the western North Atlantic, Geophys. Res. Lett., 35, L04818, doi:10.1029/2007GL032276.

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