Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 7 4 2007 10.5194/acpd-7-12349-2007 http://www.atmos-chem-phys-discuss.net/7/12349/2007/ http://www.atmos-chem-phys-discuss.net/7/12349/2007/acpd-7-12349-2007.html http://www.atmos-chem-phys-discuss.net/7/12349/2007/acpd-7-12349-2007.pdf 12349 12379 2007-08-21 Validation of 525 nm and 1020 nm aerosol extinction profiles derived from ACE imager data: comparisons with GOMOS, SAGE II, SAGE III, POAM III, and OSIRIS F. Vanhellemont filip.vanhellemont@aeronomie.be C. Tetard A. Bourassa M. Fromm J. Dodion D. Fussen C. Brogniez K. L. Gilbert D. N. Turnbull P. Bernath C. Boone K. A. Walker Belgian Institute for Space Aeronomy, Ringlaan 3, B-1180, Brussels, Belgium LOA, Université de Science et Technologies de Lille, Bâtiment P5, F-59655 Villeneuve d'�Ascq Cedex, France University of Saskatchewan, 116 Science Place, Saskatoon, SK S7N 5E2, Canada Naval Research Lab, 4555 Overlook Ave. SW, Washington, DC 20375 USA Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada The Canadian ACE (Atmospheric Chemistry Experiment) mission is dedicated to the retrieval of a large number of atmospheric trace gas species using the solar occultation technique in the infrared and UV/visible spectral domain. However, two additional solar disk imagers (at 525 nm and 1020 nm) were added for a number of reasons, including the retrieval of aerosol and cloud products. In this paper, we present the first validation results for these imager aerosol/cloud optical extinction coefficient profiles, by intercomparison with profiles derived from measurements performed by 3 solar occultation instruments (SAGE II, SAGE III, POAM III), one stellar occultation instrument (GOMOS) and one limb sounder (OSIRIS). The results indicate that the ACE imager profiles are of good quality in the upper troposphere/lower stratosphere, although the aerosol extinction for the visible channel at 525 nm contains a significant negative bias at higher altitudes, while the profiles are systematically too high at 1020 nm. Both problems are probably related to ACE imager instrumental issues. Bernath, P F., McElroy, C T., Abrams, M C., Boone, C D., Butler, M., Camy-Peyret, C., Carleer, M., Clerbaux, C., Coheur, P.-F., Colin, R., DeCola, P., DeMazière, M., Drummond, J R., Dufour, D., Evans, W. F J., Fast, H., Fussen, D., Gilbert, K., Jennings, D E., Llewellyn, E J., Lowe, R P., Mahieu, E., McConell, J C., McHugh, M., McLeod, S D., Michaud, R., Midwinter, C., Nassar, R., Nichitiu, F., Nowlan, C., Rinsland, C P., Rochon, Y J., Rowlands, N., Semeniuk, K., Simon, P., Skelton, R., Sloan, J J., Soucy, M A., Strong, K., Tremblay, P., Turnbull, D., Walker, K A., Walkty, I., Wardle, D A., Wehrle, V., Zander, R., and Zou, J.: Atmospheric Chemistry Experiment (ACE): Mission overview, Geophys. Res. Lett., 32, L15S01, \doi10.1029/2005GL022386, 2005. Bertaux, J L., Megie, G., Widemann, T., Chassefière, E., Pellinen, R., Kyrölä, E., Korpela, S., and Simon, P.: Monitoring of ozone trend by stellar occultations: The GOMOS instrument, Adv. Space Res., 11, 3237–3242, 1991. Bodhaine, B A., Wood, N B., Dutton, E G., and Slusser, J R.: On Rayleigh Optical Depth Calculations, J. Atmos. Oceanic Technol., 16, 1854–1861, 1999. Bogumil, K., Orphal, J., Voigt, S., Bovensmann, H., Fleischmann, O C., Hartmann, M., Homann, T., Spietz, P., Vogel, A., and Burrows, J P.: Reference Spectra of Atmospheric Trace Gases Measured by the SCIAMACHY PFM Satellite Spectrometer, in: Proc. 1st Europ. Sympos. Atmos. Meas. from Space (ESAMS-99), ISSN 1022-6656, 2, 443–447, ESA-ESTEC, Noordwijk, The Netherlands, 1999. Bourassa, A E., Degenstein, D A., Gattinger, R L., and Llewellyn, E J.: Stratospheric aerosol retrieval with OSIRIS Limb Scatter Measurements, J. Geophys. Res., 112, D10217, doi:10.1029/2006JD008079, 2007. Chu, W., McCormick, M., Lenoble, J., Brogniez, C., and Pruvost, P.: SAGE II inversion algorithm, J. Geophys. Res., 94, 8339–8351, 1989. Dodion, J., Fussen, D., Vanhellemont, F., Bingen, C., Mateshvili, N., Gilbert, K., Skelton, R., Turnbull, D., McLeod, S D., Boone, C D., Walker, K A., and Bernath, P F.: Cloud detection in the upper troposphere-lower stratosphere region via ACE imagers: A qualitative study, J. Geophys. Res., 112, D03208, \doi10.1029/2006JD007160, 2007. Fussen, D., Vanhellemont, F., Bingen, C., Kyrölä, E., Tamminen, J., Sofieva, V., Hassinen, S., Seppala, A., Verronen, P T., Bertaux, J.-L., Hauchecorne, A., Dalaudier, F., Fanton~d'Andon, O., Barrot, G., Mangin, A., Theodore, B., Guirlet, M., Renard, J.-B., Fraisse, R., Snoeij, P., Koopman, R., and Saavedra, L.: Autoregressive smoothing of GOMOS transmittances, Adv. Space Res., 36, 899–905, \doi10.1016/j.asr.2005.04.007, 2005. Gilbert, K L., Turnbull, D N., Walker, K A., Boone, C D., McCleod, S D., Butler, M., Skelton, R., Bernath, P F., Chateauneuf, F., and Soucy, M A.: The On-Board Imagers for the Canadian ACE SCISAT-1 Mission, J. Geophys. Res., 112, D12207, \doi10.1029/2006JD007714, 2007. Kyrölä, E., Tamminen, J., Leppelmeier, G., Sofieva, V., Hassinen, S., Bertaux, J., Hauchecorne, A., Dalaudier, F., Cot, C., Korablev, O., Fanton~d'Andon, O., Barrot, G., Mangin, A., Theodore, B., Guirlet, M., Etanchaud, F., Snoeij, P., Koopman, R., Saavedra, L., Fraisse, R., Fussen, D., and Vanhellemont, F.: GOMOS on Envisat – an overview, Adv. Space Res., 33, 1020–1028, 2004. Llewellyn, E J., Lloyd, N D., Degenstein, D A., Gattinger, R L., Petelina, S V., Bourassa, A E., Wiensz, J T., Ivanov, E V., McDade, I C., Solheim, B H., McConnell, J C., Haley, C S., von Savigny, C., Sioris, C E., McLinden, C A., Griffioen, E., Kaminski, J., Evans, W. F J., Puckrin, E., Strong, K., Wehrle, V., Hum, R H., Kendall, D. J W., Matsushita, J., Murtagh, D P., Brohede, S., Stegman, J., Witt, G., Barnes, G., Payne, W F., Piché, L., Smith, K., Warshaw, G., Deslauniers, D L., Marchand, P., Richardson, E H., King, R A., Wevers, I., McCreath, W., Kyrölä, E., Oikarinen, L., Leppelmeier, G W., Auvinen, H., Mégie, G., Hauchecorne, A., Lefèvre, F., de~La~Nöe, J., Ricaud, P., Frisk, U., Sjoberg, F., von Schéele, F., and Nordh, L.: The OSIRIS instrument on the Odin spacecraft, Canadian J. Phys., 82, 411–422, \doi10.1139/P04-005, 2004. Lucke, R L., Korwan, D., Bevilacqua, R M., Hornstein, J S., Shettle, E P., Chen, D T., Daehler, M., Lumpe, J D., Fromm, M D., Debrestian, D., Neff, B., Squire, M., König-Langlo, G., and Davies, J.: The Polar Ozone and Aerosol Measurement (POAM III) Instrument and Early Validation Results, J. Geophys. Res., 104, 785–799, 1999. McElroy, C. and et~al.: The ACE-MAESTRO instrument on SCISAT: description, performance, and preliminary results, Appl. Optics, 46, 4341–4356, 2007. Randall, C E., Bevilacqua, R M., Lumpe, J D., and Hoppel, K W.: Validation of POAM III aerosols: Comparison to SAGE II and HALOE, J. Geophys. Res., 106, 27 525–27 536, 2001. Rind, D., McCormick, M., and the SAGE III ATBD~team: SAGE III Algorithm Theoretical Basis Document (ATBD) Solar and Lunar Algorithm, Tech. rep., 2002. Russell, P B. and McCormick, M P.: SAGE II Aerosol Data Validation and Initial Data Use: An Introduction and Overview, J. Geophys. Res., 94, 8335–8338, 1989. Thomason, L., Poole, L., and Randall, C.: SAGE III aerosol extinction validation in the Arctic winter: comparisons with SAGE II and POAM III, Atmos. Chem. Phys., 7, 1423–1433, 2007. Yue, G K., C. H L. and Wang, P H.: Comparing aerosol extinctions measured by Stratospheric Aerosol and Gas Measurement (SAGE) II and III satellite experiments in 2002 and 2003, J. Geophys. Res., 110, D11202, \doi10.1029/2004JD005421, 2005.