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

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

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3504818c&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 4, CiteID L04818

Physics

5

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 (1855), Atmospheric Composition And Structure: Constituent Sources And Sinks

Scientific paper

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.

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