ACP Atmospheric Chemistry and Physics ACP 1680-7324 Copernicus GmbH Göttingen, Germany 10.5194/acp-12-5207-2012 Technical Note: A trace gas climatology derived from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) data set Jones A. 1 Walker K. A. 1 2 Jin J. J. 3 Taylor J. R. 4 5 Boone C. D. 2 Bernath P. F. 6 7 Brohede S. 8 Manney G. L. 3 9 McLeod S. 2 Hughes R. 2 Daffer W. H. 3 Department of Physics, University of Toronto, Toronto, Canada Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA National Center for Atmospheric Research, Boulder, CO, USA National Ecological Observatory Network, Boulder, CO, USA Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia, USA Department of Chemistry, University of York, Heslington, York, UK Department of Radio and Space Science, Chalmers University of Technology, Gothenburg, Sweden New Mexico Institute of Mining and Technology, Socorro, New Mexico, USA 14 06 2012 12 11 5207 5220 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.net/12/5207/2012/acp-12-5207-2012.html The full text article is available as a PDF file from http://www.atmos-chem-phys.net/12/5207/2012/acp-12-5207-2012.pdf

The Atmospheric Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS) aboard the Canadian satellite SCISAT (launched in August 2003) was designed to investigate the composition of the upper troposphere, stratosphere, and mesosphere. ACE-FTS utilizes solar occultation to measure temperature and pressure as well as vertical profiles of over thirty chemical species including O<sub>3</sub>, H<sub>2</sub>O, CH<sub>4</sub>, N<sub>2</sub>O, CO, NO, NO<sub>2</sub>, N<sub>2</sub>O<sub>5</sub>, HNO<sub>3</sub>, HCl, ClONO<sub>2</sub>, CCl<sub>3</sub>F, CCl<sub>2</sub>F<sub>2</sub>, and HF. Global coverage for each species is obtained approximately over a three month period and measurements are made with a vertical resolution of typically 3–4 km. A quality-controlled climatology has been created for each of these 14 baseline species, where individual profiles are averaged over the period of February 2004 to February 2009. Measurements used are from the ACE-FTS version 2.2 data set including updates for O<sub>3</sub> and N<sub>2</sub>O<sub>5</sub>. The climatological fields are provided on a monthly and three-monthly basis (DJF, MAM, JJA, SON) at 5 degree latitude and equivalent latitude spacing and on 28 pressure surfaces (26 of which are defined by the Stratospheric Processes And their Role in Climate (SPARC) Chemistry-Climate Model Validation Activity). The ACE-FTS climatological data set is available through the ACE website.

 References Beaver, G. M. and Russell, J. M.: The climatology of stratospheric HCl and HF observed by HALOE, Adv. Space Res., 21, 1373–1382, 1998. 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., Mazière, M. D., 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., McConnell, J. C., McHugh, M., McLeod, S. D., Michaud, R., Midwinter, C., Nassar, R., Nichitu, 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, http://dx.doi.org/10.1029/2005GL022386doi:10.1029/2005GL022386, 2005. Boone, C. D., Nassar, R., Walker, K. A., Rochon, Y. J., McLeod, S. D., Rinsland, C. P., and Bernath, P. F.: Retrievals for the Atmospheric Chemistry Experiment Fourier-Transform Spectrometer, Appl. Optics, 44, 7218–7231, 2005. Brohede, S., McLinden, C. A., Urban, J., Haley, C. S., Jonsson, A. I., and Murtagh, D.: Odin stratospheric proxy NO$_\text y$ measurements and climatology, Atmos. Chem. Phys., 8, 5731–5754, http://dx.doi.org/10.5194/acp-8-5731-2008doi:10.5194/acp-8-5731-2008, 2008. Butchart, N. and Remsberg, E. E.: The area of the stratospheric polar vortex as a diagnostic for tracer transport on an isentropic surface, J. Atmos. Sci., 43, 1319–1339, 1986. Carleer, M. R., Boone, C. D., Walker, K. A., Bernath, P. F., Strong, K., Sica, R. J., Randall, C. E., Vömel, H., Kar, J., Höpfner, M., Milz, M., von Clarmann, T., Kivi, R., Valverde-Canossa, J., Sioris, C. E., Izawa, M. R. M., Dupuy, E., McElroy, C. T., Drummond, J. R., Nowlan, C. R., Zou, J., Nichitiu, F., Lossow, S., Urban, J., Murtagh, D., and Dufour, D. G.: Validation of water vapour profiles from the Atmospheric Chemistry Experiment (ACE), Atmos. Chem. Phys. Discuss., 8, 4499–4559, http://dx.doi.org/10.5194/acpd-8-4499-2008doi:10.5194/acpd-8-4499-2008, 2008. Chiou, E. W., McCormick, M., and Chu, W. P.: Global water vapor distributions in the stratosphere and upper troposphere derived from 5.5 years of SAGE~II observations (1986–1991), J. Geophys. Res., 102, 19105–19118, 1997. Clerbaux, C., George, M., Turquety, S., Walker, K. A., Barret, B., Bernath, P., Boone, C., Borsdorff, T., Cammas, J. P., Catoire, V., Coffey, M., Coheur, P.-F., Deeter, M., De Mazière, M., Drummond, J., Duchatelet, P., Dupuy, E., de Zafra, R., Eddounia, F., Edwards, D. P., Emmons, L., Funke, B., Gille, J., Griffith, D. W. T., Hannigan, J., Hase, F., Höpfner, M., Jones, N., Kagawa, A., Kasai, Y., Kramer, I., Le Flochmo\"en, E., Livesey, N. J., López-Puertas, M., Luo, M., Mahieu, E., Murtagh, D., Nédélec, P., Pazmino, A., Pumphrey, H., Ricaud, P., Rinsland, C. P., Robert, C., Schneider, M., Senten, C., Stiller, G., Strandberg, A., Strong, K., Sussmann, R., Thouret, V., Urban, J., and Wiacek, A.: CO measurements from the ACE-FTS satellite instrument: data analysis and validation using ground-based, airborne and spaceborne observations, Atmos. Chem. Phys., 8, 2569–2594, http://dx.doi.org/10.5194/acp-8-2569-2008doi:10.5194/acp-8-2569-2008, 2008. Dupuy, E., Walker, K. A., Kar, J., Boone, C. D., McElroy, C. T., Bernath, P. F., Drummond, J. R., Skelton, R., McLeod, S. D., Hughes, R. C., Nowlan, C. R., Dufour, D. G., Zou, J., Nichitiu, F., Strong, K., Baron, P., Bevilacqua, R. M., Blumenstock, T., Bodeker, G. E., Borsdorff, T., Bourassa, A. E., Bovensmann, H., Boyd, I. S., Bracher, A., Brogniez, C., Burrows, J. P., Catoire, V., Ceccherini, S., Chabrillat, S., Christensen, T., Coffey, M. T., Cortesi, U., Davies, J., De Clercq, C., Degenstein, D. A., De Mazière, M., Demoulin, P., Dodion, J., Firanski, B., Fischer, H., Forbes, G., Froidevaux, L., Fussen, D., Gerard, P., Godin-Beekmann, S., Goutail, F., Granville, J., Griffith, D., Haley, C. S., Hannigan, J. W., Höpfner, M., Jin, J. J., Jones, A., Jones, N. B., Jucks, K., Kagawa, A., Kasai, Y., Kerzenmacher, T. E., Kleinböhl, A., Klekociuk, A. R., Kramer, I., Küllmann, H., Kuttippurath, J., Kyrölä, E., Lambert, J.-C., Livesey, N. J., Llewellyn, E. J., Lloyd, N. D., Mahieu, E., Manney, G. L., Marshall, B. T., McConnell, J. C., McCormick, M. P., McDermid, I. S., McHugh, M., McLinden, C. A., Mellqvist, J., Mizutani, K., Murayama, Y., Murtagh, D. P., Oelhaf, H., Parrish, A., Petelina, S. V., Piccolo, C., Pommereau, J.-P., Randall, C. E., Robert, C., Roth, C., Schneider, M., Senten, C., Steck, T., Strandberg, A., Strawbridge, K. B., Sussmann, R., Swart, D. P. J., Tarasick, D. W., Taylor, J. R., Tétard, C., Thomason, L. W., Thompson, A. M., Tully, M. B., Urban, J., Vanhellemont, F., Vigouroux, C., von Clarmann, T., von der Gathen, P., von Savigny, C., Waters, J. W., Witte, J. C., Wolff, M., and Zawodny, J. M.: Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE), Atmos. Chem. Phys., 9, 287–343, http://dx.doi.org/10.5194/acp-9-287-2009doi:10.5194/acp-9-287-2009, 2009. Fortuin, J. P. F. and Kelder, H.: An ozone climatology based on ozonesonde and satellite measurements, J. Geophys. Res., 103, 31709–31734, 1998. Froidevaux, L., Jiang, Y. B., Lambert, A., Livesey, N. J., Read, W. G., Waters, J. W., Fuller, R. A., Marcy, T. P., Popp, P. J., Gao, R. S., Fahey, D. W., Jucks, K. W., Stachnik, R. A., Toon, G. C., Christensen, L .E., Webster, C. R., Bernath, P .F., Boone, C. D., Walker, K. A., Pumphrey, H. C., Harwood, R. S., Manney, G. L., Schwartz, M. J., Daffer, W. H., Drouin, B. J., Cofield, R. E., Cuddy, D. T., Jarnot, R. F., Knosp, B. W., Perun, V. S., Snyder, W. V., Stek, P. C., Thurstans, R. P. and Wagner, P. A.: Validation of Aura Microwave Limb Sounder HCl measurements, J. Geophys. Res., 113, D15S25, http://dx.doi.org/10.1029/2007JD009025doi:10.1029/2007JD009025, 2008. Funke, B., López-Puertas, M., Gil-Lòpez, S., von Clarmann, T., Stiller, G. P., Fischer, H., and Kellmann, S.: Downward transport of upper atmospheric NOx into the polar stratosphere and lower mesosphere during the Antarctic 2003 and Arctic 2002/2003 winters, J. Geophys. Res., 110, D09308, http://dx.doi.org/10.1029/2005JD006463doi:10.1029/2005JD006463, 2005. Gilbert, K.L.,Turnbull, D. N., Walker, K. A., Boone, C. D., McLeod, S. D., Butler, M., Skelton, R., Bernath, P. F., Chateauneuf, F., and Soucy, M. A.: The onboard imagers for the Canadian ACE SCISAT-1 mission, J. Geophys. Res., 112, D12207, http://dx.doi.org/doi:10.1029/2006JD007714doi:10.1029/2006JD007714, 2007. Grooß, J.-U. and Russell III, J. M.: Technical note: A stratospheric climatology for O<sub>3</sub>, H<sub>2</sub>O, CH<sub>4</sub>, NO$_\text x$, HCl and HF derived from HALOE measurements, Atmos. Chem. Phys., 5, 2797–2807, http://dx.doi.org/10.5194/acp-5-2797-2005doi:10.5194/acp-5-2797-2005, 2005. Hoffmann, L., Kaufmann, M., Spang, R., Muller, R., Remedios, J. J., Moore, C., Volk, M., and von Clarmann, T.: Envisat MIPAS measurements of CFC-11: retrieval, validation, and climatology, Atmos. Chem. Phys., 8, 3671–3688, 2008. Huber, P.: Robust Statistics, Wiley, New York, 2004. Jones, A., Qin, G., Strong, K., Walker, K. A., McLinden, C. A., Toohey, M., Kerzenmacher, T., Bernath, P. F., and Boone, C. D.: A global inventory of stratospheric NO$_\text y$ from ACE-FTS, J. Geophys. Res., 116, D17304, http://dx.doi.org/10.1029/2010JD015465doi:10.1029/2010JD015465, 2011. Kerzenmacher, T., Wolff, M. A., Strong, K., Dupuy, E., Walker, K. A., Amekudzi, L. K., Batchelor, R. L., Bernath, P. F., Berthet, G., Blumenstock, T., Boone, C. D., Bramstedt, K., Brogniez, C., Brohede, S., Burrows, J. P., Catoire, V., Dodion, J., Drummond, J. R., Dufour, D. G., Funke, B., Fussen, D., Goutail, F., Griffith, D. W. T., Haley, C. S., Hendrick, F., Höpfner, M., Huret, N., Jones, N., Kar, J., Kramer, I., Llewellyn, E. J., López-Puertas, M., Manney, G., McElroy, C. T., McLinden, C. A., Melo, S., Mikuteit, S., Murtagh, D., Nichitiu, F., Notholt, J., Nowlan, C., Piccolo, C., Pommereau, J.-P., Randall, C., Raspollini, P., Ridolfi, M., Richter, A., Schneider, M., Schrems, O., Silicani, M., Stiller, G. P., Taylor, J., Tétard, C., Toohey, M., Vanhellemont, F., Warneke, T., Zawodny, J. M., and Zou, J.: Validation of NO<sub>2</sub> and NO from the Atmospheric Chemistry Experiment (ACE), Atmos. Chem. Phys., 8, 5801–5841, http://dx.doi.org/10.5194/acp-8-5801-2008doi:10.5194/acp-8-5801-2008, 2008. Kouker, W., Langbein, I., Reddmann, T., and Ruhnke, R.: The Karlsruhe simulation model of the middle atmosphere (KASIMA), version 2, 6278, FZKA Wissenschaftliche Berichte – Scientific Reports, Forschungszentrum Karlsruhe, 1999. López-Puertas, M., Funke, B., Gil-López, S., Von Clarmann, T., Stiller, G. P., Höpfner, M., Kellman, S., Fischer, H., and Jackman, C. H.: Observation of NO$_\text x$ enhancement and ozone depletion in the Northern and Southern Hemispheres after the October-November 2003 solar proton events, J. Geophys. Res., 110, A09S43, http://dx.doi.org/10.1029/2005JA011050doi:10.1029/2005JA011050, 2005. Mahieu, E., Duchatelet, P., Demoulin, P., Walker, K. A., Dupuy, E., Froidevaux, L., Randall, C., Catoire, V., Strong, K., Boone, C. D., Bernath, P. F., Blavier, J.-F., Blumenstock, T., Coffey, M., De Mazière, M., Griffith, D., Hannigan, J., Hase, F., Jones, N., Jucks, K. W., Kagawa, A., Kasai, Y., Mebarki, Y., Mikuteit, S., Nassar, R., Notholt, J., Rinsland, C. P., Robert, C., Schrems, O., Senten, C., Smale, D., Taylor, J., Tétard, C., Toon, G. C., Warneke, T., Wood, S. W., Zander, R., and Servais, C.: Validation of ACE-FTS v2.2 measurements of HCl, HF, CCl<sub>3</sub>F and CCl<sub>2</sub>F<sub>2</sub> using space-, balloon- and ground-based instrument observations, Atmos. Chem. Phys., 8, 6199–6221, http://dx.doi.org/10.5194/acp-8-6199-2008doi:10.5194/acp-8-6199-2008, 2008. Manney, G. L., Daffer, W. H., Zawodny, J. M., Bernath, P. F., Hoppel, K. W., Walker, K. A., Knosp, B. W., Boone, C., Remsberg, E. E., Santee, M. L., Lynn Harvey, V., Pawson, S., Jackson, D. R., Deaver, L., McElroy, C. T., McLinden, C. A., Drummond, J. A., Pumphrey, H. C., Lambert, A., Schwartz, M. J., Froidevaux, L., McLeod, S., Takacs, L. L., Suarez, M. J., Trepte, C. R., Cuddy, D. T., Livesey, N. J., Harwood, R. S., and Waters, J. W.: Solar Occultation Satellite Data and Derived Meteorological Products: Sampling Issues and Comparisons with Aura MLS, J. Geophys. Res., 112, D24S50, http://dx.doi.org/10.1029/2007JD008709doi:10.1029/2007JD008709, 2007. De Mazière, M., Vigouroux, C., Bernath, P. F., Baron, P., Blumenstock, T., Boone, C., Brogniez, C., Catoire, V., Coffey, M., Duchatelet, P., Griffith, D., Hannigan, J., Kasai, Y., Kramer, I., Jones, N., Mahieu, E., Manney, G. L., Piccolo, C., Randall, C., Robert, C., Senten, C., Strong, K., Taylor, J., Tétard, C., Walker, K. A., and Wood, S.: Validation of ACE-FTS v2.2 methane profiles from the upper troposphere to the lower mesosphere, Atmos. Chem. Phys., 8, 2421–2435, http://dx.doi.org/10.5194/acp-8-2421-2008doi:10.5194/acp-8-2421-2008, 2008. McElroy, C. T., Nowlan, C. R., Drummond, J. R., Bernath, P. F., Barton, D. V., Dufour, D. G., Midwinter, C., Hall, R. B., Ogyu, A., Ullberg, A., Wardle, D. I., Kar, J., Zou, J., Nichitiu, F., Boone, C. D., Walker, K. A., and Rowlands, N.: The ACE-MAESTRO instrument on SCISAT: Description, performance, and preliminary results, Appl. Optics, 46, 4341–4356, 2007. McLinden, C. A., Olsen, S. C., Hannegan, B., Wild, O., Prather, M. J., and Sundet, J.: Stratospheric ozone in 3-D models: A simple chemistry and the cross-tropopause flux, J. Geophys. Res., 105, 14653–14665, 2000. McLinden, C. A., Haley, C. S., and Sioris, C. E.: Diurnal effects in limb scatter observations, J. Geophys. Res., 111, D14302, http://dx.doi.org/10.1029/2005JD006628doi:10.1029/2005JD006628, 2006. McPeters, R. D., Labow, G. J., and Logan, J. A.: Ozone climatological profiles for satellite retrieval algorithms, J. Geosphys Res., 112, D05308, http://dx.doi.org/10.1029/2005JD006823doi:10.1029/2005JD006823, 2007. Nassar, R., Bernath, P. F., Boone, C. D., McLeod, S. D., Skelton, R., Walker, K. A., Rinsland, C. P., and Duchatelet, P.: A global inventory of stratospheric fluorine in 2004 based on Atmospheric Chemistry Experiment Fourier transform spectrometer (ACE-FTS) measurements, J. Geophys. Res., 111, D22313, http://dx.doi.org/10.1029/2006JD007395doi:10.1029/2006JD007395, 2006. Natarajan, M., Remsberg, E. E., Deaver, E. E., and Russell III, J. M.: Anomalously high levels of NO$_\text x$ in the polar upper stratosphere during Apr, 2004: Photochemical consistency of HALOE observations, Geophys. Res. Lett. 31, L15113, http://dx.doi.org/10.1029/2004GL020566doi:10.1029/2004GL020566, 2004. Randall, C. E., Harvey, V. L., Manney, G. L., Orsolini, Y., Codrescu, M., Sioris, C., Brohede, S., Haley, C. S., Gordley, L. L., Zawodny, J. M., and Russell, J. M.: Stratospheric effects of energetic particle precipitation in 2003–2004, Geophys. Res. Lett., 32, L05802, http://dx.doi.org/10.1029/2004GL022003doi:10.1029/2004GL022003, 2005. Randall, C. E., Harvey, V. L., Singleton, C. S., Bernath, P. F., Boone, C. D., and Kozyra, J. U.: Enhanced NO$_\text x$ in 2006 linked to strong upper stratospheric Arctic vortex, Geophys. Res. Lett., 33, L18811, http://dx.doi.org/10.1029/2006GL027160doi:10.1029/2006GL027160, 2006. Randall, C. E., Harvey, V. L., Singleton, C. S., Bailey, S. M., Bernath, P. F., Codrescu, M., Nakajima, H., Russell III, J. M.: Energetic particle precipitation effects on the Southern Hemisphere stratosphere in 1992–2005, J. Geophys. Res., 112, D08308, http://dx.doi.org/10.1029/2006JD007696doi:10.1029/2006JD007696, 2007. Randel, W. J., Wu, F., Russell, J. M., Roche, A., and Waters, J. W.: Seasonal cycles and QBO variations in stratospheric CH<sub>4</sub> and H<sub>2</sub>O observed in UARS HALOE data, J. Atmos. Sci., 55, 163–185, 1998. Rienecker, M. M., Suarez, M. J., Todling, R., Bacmeister, J., Takacs, L., Liu, H.-C., Gu, W., Sienkiewicz, M., Koster, R. D., Gelaro, R., Stajner, I., and Nielsen, J. E.: The GEOS-5 Data Assimilation System – Documentation of Versions 5.0.1, 5.1.0, and 5.2.0, Technical Report Series on Global Modeling and Data Assimilation, 27, 2008. Rinsland, C. P., Boone, C., Nassar, R., Walker, K., Bernath, P., McConnell, J. C., and Chiou, L.: Atmospheric Chemistry Experiment (ACE) Arctic stratospheric measurements of NO$_\text x$ during February and March 2004: Impact of intense solar flares, Geophys. Res. Lett., 32, L16S05, http://dx.doi.org/10.1029/2005GL022425doi:10.1029/2005GL022425, 2005. Rothman, L. S., Jacquemart, D., Barbe, A., Chris Bennerc, D., Birk, M., Brown, L. R., Carleer, M. R., Chackerian Jr., C., Chance, K., Coudert, L. H., Dana, V., Devi, V. M., Flaud, J.-M., Gamache, R. R., Goldman, A., Hartmann, J.-M., Jucks, K. W., Maki, A. G., Mandin, J.-Y., Massie, S. T., Orphal, J., Perrin, A., Rinsland, C. P., Smith, M. A. H., Tennyson, J., Tolchenov, R. N., Toth, R. A., Vander Auwera, J., Varanasi, P., and Wagner, G.: The HITRAN 2004 molecular spectroscopic database, J. Quant. Spectrosc. Ra., 96, 139–204, 2005. Russell, J. M., Gordley, L. L., Park, J. H., Drayson, S. R., Tuck, A. F., Harries, J. E., Cicerone, R. J., Crutzen, P. J., and Frederick, J. E.: The Halogen Occultation Experiment, J. Geophys. Res., 98, 10777–10797, 1993. Scinocca, J. F., McFarlane, N. A., Lazare, M., Li, J., and Plummer, D.: Technical Note: The CCCma third generation AGCM and its extension into the middle atmosphere, Atmos. Chem. Phys., 8, 7055–7074, http://dx.doi.org/10.5194/acp-8-7055-2008doi:10.5194/acp-8-7055-2008, 2008. SPARC CCMVal, SPARC Report on the Evaluation of Chemistry-Climate Models, edited by: Eyring, V., Shepherd, T. G., and Waugh, D. W., SPARC Report No 5, WCRP-132, WMO/TD-No 1526, 2010. SPARC Data Initiative, SPARC Data Initiative Report, edited by: Hegglin, M. I. and Tegtmeier, S., SPARC Report No 6, in preparation. \hack Strong, K., Wolff, M. A., Kerzenmacher, T. E., Walker, K. A., Bernath, P. F., Blumenstock, T., Boone, C., Catoire, V., Coffey, M., De Mazière, M., Demoulin, P., Duchatelet, P., Dupuy, E., Hannigan, J., Höpfner, M., Glatthor, N., Griffith, D. W. T., Jin, J. J., Jones, N., Jucks, K., Kuellmann, H., Kuttippurath, J., Lambert, A., Mahieu, E., McConnell, J. C., Mellqvist, J., Mikuteit, S., Murtagh, D. P., Notholt, J., Piccolo, C., Raspollini, P., Ridolfi, M., Robert, C., Schneider, M., Schrems, O., Semeniuk, K., Senten, C., Stiller, G. P., Strandberg, A., Taylor, J., Tétard, C., Toohey, M., Urban, J., Warneke, T., and Wood, S.: Validation of ACE-FTS N<sub>2</sub>O measurements, Atmos. Chem. Phys., 8, 4759–4786, http://dx.doi.org/10.5194/acp-8-4759-2008doi:10.5194/acp-8-4759-2008, 2008. Strahan, S. E., Duncan, B. N., and Hoor, P.: Observationally derived transport diagnostics for the lowermost stratosphere and their application to the GMI chemistry and transport model, Atmos. Chem. Phys., 7, 2435–2445, http://dx.doi.org/10.5194/acp-7-2435-2007doi:10.5194/acp-7-2435-2007, 2007. Toohey, M., Strong, K., Bernath, P. F., Boone, C. D., Walker, K. A., Jonsson, A. I., and Shepherd, T. G.: Validating the reported random errors of ACE?FTS measurements, J. Geophys. Res., 115, D20304, http://dx.doi.org/10.1029/2010JD014185doi:10.1029/2010JD014185, 2010. Urban, J., Pommier, M., Murtagh, D. P., Santee, M. L., and Orsolini, Y. J.: Nitric acid in the stratosphere based on Odin observations from 2001 to 2009 – Part 1: A global climatology, Atmos. Chem. Phys., 9, 7031–7044, http://dx.doi.org/10.5194/acp-9-7031-2009doi:10.5194/acp-9-7031-2009, 2009. Wolff, M. A., Kerzenmacher, T., Strong, K., Walker, K. A., Toohey, M., Dupuy, E., Bernath, P. F., Boone, C. D., Brohede, S., Catoire, V., von Clarmann, T., Coffey, M., Daffer, W. H., De Mazière, M., Duchatelet, P., Glatthor, N., Griffith, D. W. T., Hannigan, J., Hase, F., Höpfner, M., Huret, N., Jones, N., Jucks, K., Kagawa, A., Kasai, Y., Kramer, I., Küllmann, H., Kuttippurath, J., Mahieu, E., Manney, G., McElroy, C. T., McLinden, C., Mébarki, Y., Mikuteit, S., Murtagh, D., Piccolo, C., Raspollini, P., Ridolfi, M., Ruhnke, R., Santee, M., Senten, C., Smale, D., Tétard, C., Urban, J., and Wood, S.: Validation of HNO<sub>3</sub>, ClONO<sub>2</sub>, and N<sub>2</sub>O$_5$ from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS), Atmos. Chem. Phys., 8, 3529–3562, http://dx.doi.org/10.5194/acp-8-3529-2008doi:10.5194/acp-8-3529-2008, 2008.