ACPD Atmospheric Chemistry and Physics Discussions ACPD 1680-7375 Copernicus GmbH Göttingen, Germany 10.5194/acpd-9-27267-2009 Validation of northern latitude tropospheric emission spectrometer stare ozone profiles with ARC-IONS sondes during ARCTAS Boxe C. S. 1 Worden J. R. 1 Bowman K. W. 1 Kulawik S. S. 1 Neu J. L. 1 Ford W. C. 2 Osterman G. B. 1 Herman R. L. 1 Eldering A. 1 Tarasick D. W. 3 Thompson A. M. 4 Doughty D. C. 4 Hoffmann M. R. 5 Oltmans S. J. 6 Earth and Space Science Division, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA Computation and Neural Systems, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA Experimental Studies, Air Quality Research Division, Environment Canada, Downsview, Ontario, CA, USA Department of Meteorology, Pennsylvania State University, University Park, Pennsylvania, USA Environmental Science and Engineering, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA NOAA Earth System Research Laboratory, Boulder, Colorado, USA 17 12 2009 9 6 27267 27301 This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://www.atmos-chem-phys-discuss.net/9/27267/2009/acpd-9-27267-2009.html The full text article is available as a PDF file from http://www.atmos-chem-phys-discuss.net/9/27267/2009/acpd-9-27267-2009.pdf

We compare Tropospheric Emission Spectrometre (TES) versions 3 and 4, V003 and V004, respectively, nadir-stare ozone profiles with ozonesonde profiles from the Arctic Intensive Ozonesonde Network Study (ARCIONS, <a href= "http://croc.gsfc.nasa.gov/arcions/"target="_blank">http://http://croc.gsfc.nasa.gov/arcions/</a>) during the Arctic Research on the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) field mission. The ozonesonde data are from launches timed to match the Aura's overpass, where 11 coincidences spanned 44&deg; N to 71&deg; N from April to July 2008. Using the TES "stare" observation mode, 32 observations are taken over each coincident ozonesonde launch. By effectively sampling the same air mass 32 times, comparisons are made between the empirically-calculated random errors to the expected random errors from measurement noise, temperature and interfering species, such as water. This study represents the first validation of high latitude (&gt;60&deg;) TES ozone. We find that the calculated errors are consistent with the actual errors with a similar vertical distribution that varies between 5% and 20% for V003 and V004 TES data. In general, TES ozone profiles are positively biased (by less than 15%) from the surface to the upper troposphere (~1000 to 100 hPa) and negatively biased (by less than 20%) from the upper troposphere to the lower stratosphere (100 to 30 hPa) when compared to the ozonesonde data. Lastly, for V003 and V004 TES data between 44&deg; N and 71&deg; N there is a small variability in the mean biases (from &minus;14 to +15%), mean theoretical errors (from 6 to 13%), and mean random errors (from 9 to 19%).

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