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Zhang, L., Jacob, D.J., Bowman, K.W., Logan, J.A., Turquety, S., Hudman, R.C., Li, Q., Beer, R., Worden, H.M., Worden, J.R., Rinsland, C.P., Kulawik, S.S., Lampel, M.C., Shephard, M.W., Fisher, B.M., Eldering, A. and Avery, M.A. (2006). Ozone-CO correlations determined by the TES satellite instrument in continental outflow regions. Geophysical Research Letters 33: doi: 10.1029/2006GL026399. issn: 0094-8276. |
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Collocated measurements of tropospheric ozone (O3) and carbon monoxide (CO) from the Tropospheric Emission Spectrometer (TES) aboard the EOS Aura satellite provide information on O3-CO correlations to test our understanding of global anthropogenic influence on O3. We examine the global distribution of TES O3-CO correlations in the middle troposphere (618 hPa) for July 2005 and compare to correlations generated with the GEOS-Chem chemical transport model and with ICARTT aircraft observations over the eastern United States (July 2004). The TES data show significant O3-CO correlations downwind of polluted continents, with dO3/dCO enhancement ratios in the range 0.4--1.0 mol mol-1 and consistent with ICARTT data. The GEOS-Chem model reproduces the O3-CO enhancement ratios observed in continental outflow, but model correlations are stronger and more extensive. We show that the discrepancy can be explained by spectral measurement errors in the TES data. These errors will decrease in future data releases, which should enable TES to provide better information on O3-CO correlations. |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Troposphere, composition and chemistry, Atmospheric Composition and Structure, Troposphere, constituent transport and chemistry, Atmospheric Processes, Remote sensing |
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Publisher
American Geophysical Union
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