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<article language="en">
	<journal>
		<journal_title>Atmospheric Chemistry and Physics Discussions</journal_title>
		<journal_url>www.atmos-chem-phys-discuss.net</journal_url>
		<issn>1680-7367</issn>
		<eissn>1680-7375</eissn>
		<volume_number>7</volume_number>
		<issue_number>6</issue_number>
		<publication_year>2007</publication_year>
	</journal>
	<doi>10.5194/acpd-7-17975-2007</doi>
	<article_url>http://www.atmos-chem-phys-discuss.net/7/17975/2007/</article_url>
	<abstract_html>http://www.atmos-chem-phys-discuss.net/7/17975/2007/acpd-7-17975-2007.html</abstract_html>
	<fulltext_pdf>http://www.atmos-chem-phys-discuss.net/7/17975/2007/acpd-7-17975-2007.pdf</fulltext_pdf>
	<start_page>17975</start_page>
	<end_page>18014</end_page>
	<publication_date>2007-12-14</publication_date>
	<article_title content_type="html">Validation of ACE-FTS v2.2 methane profiles from the upper troposphere to lower mesosphere</article_title>
	<authors>
		<author numeration="1" affiliations="1">
			<name>M. De Mazière</name>
		</author>
		<author numeration="2" affiliations="1">
			<name>C. Vigouroux</name>
		</author>
		<author numeration="3" affiliations="2,14">
			<name>P. F. Bernath</name>
		</author>
		<author numeration="4" affiliations="3">
			<name>P. Baron</name>
		</author>
		<author numeration="5" affiliations="4">
			<name>T. Blumenstock</name>
		</author>
		<author numeration="6" affiliations="2">
			<name>C. Boone</name>
		</author>
		<author numeration="7" affiliations="5">
			<name>C. Brogniez</name>
		</author>
		<author numeration="8" affiliations="6">
			<name>V. Catoire</name>
		</author>
		<author numeration="9" affiliations="7">
			<name>M. Coffey</name>
		</author>
		<author numeration="10" affiliations="8">
			<name>P. Duchatelet</name>
		</author>
		<author numeration="11" affiliations="9">
			<name>D. Griffith</name>
		</author>
		<author numeration="12" affiliations="7">
			<name>J. Hannigan</name>
		</author>
		<author numeration="13" affiliations="3">
			<name>Y. Kasai</name>
		</author>
		<author numeration="14" affiliations="4">
			<name>I. Kramer</name>
		</author>
		<author numeration="15" affiliations="9">
			<name>N. Jones</name>
		</author>
		<author numeration="16" affiliations="8">
			<name>E. Mahieu</name>
		</author>
		<author numeration="17" affiliations="10,15">
			<name>G. L. Manney</name>
		</author>
		<author numeration="18" affiliations="11">
			<name>C. Piccolo</name>
		</author>
		<author numeration="19" affiliations="16">
			<name>C. Randall</name>
		</author>
		<author numeration="20" affiliations="6">
			<name>C. Robert</name>
		</author>
		<author numeration="21" affiliations="1">
			<name>C. Senten</name>
		</author>
		<author numeration="22" affiliations="12">
			<name>K. Strong</name>
		</author>
		<author numeration="23" affiliations="12">
			<name>J. Taylor</name>
		</author>
		<author numeration="24" affiliations="5">
			<name>C. Tétard</name>
		</author>
		<author numeration="25" affiliations="2,12">
			<name>K. A. Walker</name>
		</author>
		<author numeration="26" affiliations="13">
			<name>S. Wood</name>
		</author>
	</authors>
	<affiliations>
		<affiliation numeration="1" content_type="html">Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium</affiliation>
		<affiliation numeration="2" content_type="html">Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada</affiliation>
		<affiliation numeration="3" content_type="html">National Institute of Information and Communications Technology (NICT), Tokyo, Japan</affiliation>
		<affiliation numeration="4" content_type="html">IMK-ASF, Forschungszentrum Karlsruhe and University Karlsruhe, Karlsruhe, Germany</affiliation>
		<affiliation numeration="5" content_type="html">Laboratoire d&apos;Optique Atmosphérique, Université des sciences et technologies de Lille, Lille, France</affiliation>
		<affiliation numeration="6" content_type="html">Laboratoire de Physique et Chimie de l&apos;Environnement, CNRS – Université d&apos;Orléans, Orléans, France</affiliation>
		<affiliation numeration="7" content_type="html">National Center for Atmospheric Research (NCAR), Boulder, CO, USA</affiliation>
		<affiliation numeration="8" content_type="html">Institut d&apos;Astrophysique et de Géophysique, Université de Liège, Liège, Belgium</affiliation>
		<affiliation numeration="9" content_type="html">School of Chemistry, University of Wollongong, Wollongong, Australia</affiliation>
		<affiliation numeration="10" content_type="html">Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA</affiliation>
		<affiliation numeration="11" content_type="html">Atmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, UK</affiliation>
		<affiliation numeration="12" content_type="html">Department of Physics, University of Toronto, Toronto, Ontario, Canada</affiliation>
		<affiliation numeration="13" content_type="html">National Institute of Water and Atmospheric Research (NIWA), Lauder, New-Zealand</affiliation>
		<affiliation numeration="14" content_type="html">Department of Chemistry, University of York, Heslington, York, UK</affiliation>
		<affiliation numeration="15" content_type="html">New Mexico Institute of Mining and Technology, Socorro, NM, USA</affiliation>
		<affiliation numeration="16" content_type="html">Laboratory for Atmospheric and Space Physics and Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, USA</affiliation>
	</affiliations>
	<abstract content_type="html">The ACE-FTS (Atmospheric Chemistry Experiment &amp;ndash; Fourier Transform
Spectrometer) solar occultation instrument that was launched onboard the
Canadian SCISAT-1 satellite in August 2003 is measuring vertical profiles
from the upper troposphere to the lower mesosphere for a large number of
atmospheric constituents. Methane is one of the key species. The version
v2.2 data of the ACE-FTS CH&lt;sub&gt;4&lt;/sub&gt; data have been compared to correlative
satellite, balloon-borne and ground-based Fourier transform infrared remote
sensing data to assess their quality. The comparison results indicate that
the accuracy of the data is within 10% in the upper troposphere &amp;ndash;  lower
stratosphere, and within 25% in the middle and higher stratosphere up to
the lower mesosphere (&lt;60 km). The observed differences are generally
consistent with reported systematic uncertainties. ACE-FTS is also shown to
reproduce the variability of methane in the stratosphere and lower
mesosphere.</abstract>
	<references>
		<reference numeration="1" content_type="text"> Abrams, M. C., Chang, A. Y., Gunson, M. R., Abbas, M. M., Goldman, A., Irion, F. W., Michelsen, H. A., Newchurch, M. J., Rinsland, C. P., Stiller, G. P., and Zander, R.: On the assessment and uncertainty of atmospheric trace gas burden measurements with high-resolution infrared solar occultation spectra from space by the ATMOS experiment, Geophys. Res. Lett., 23, 2337&amp;ndash;2340, 1996. </reference>
		<reference numeration="2" content_type="text"> Barnet, C., Datta, S., and Strow, L.: Trace gas measurements from the Atmospheric Infrared Sounder (AIRS), in Optical Remote Sensing (Trends in Optics and Photonics Series Vol.85), 89&amp;ndash;92, 2003. </reference>
		<reference numeration="3" content_type="text"> Bernath, P. F., McElroy, C. T., Abrams, M. C., et al.: Atmospheric Chemistry Experiment (ACE): Mission overview, Geophys. Res. Lett., 32, L15S01, doi:10.1029/2005GL022386, 2005. </reference>
		<reference numeration="4" content_type="text"> Boone, C. D., R. Nassar, K. A. Walker, Y. Rochon, S. D. McLeod, C. P. Rinsland, and Bernath, P. F. : Retrievals for the atmospheric chemistry experiment Fourier-transform spectrometer, Appl. Optics, 44 (33), 7218&amp;ndash;7231, 2005. </reference>
		<reference numeration="5" content_type="text"> Brasseur, G. P., Orlando, J. J., and Tyndall, G. S.: Atmospheric Chemistry and Global Change, Oxford University Press (New York, Oxford), 1999. </reference>
		<reference numeration="6" content_type="text"> Espy, P. J. and Hartogh, P.: MIPAS: Potential of the experiment, data processing and validation of results, Special Issue in Atmos. Chem. Phys., 2006. </reference>
		<reference numeration="7" content_type="text"> Fischer, H., Birk, M., Blom, C., Carli, B., Carlotti, M., von CLarmann, T., Delbouille, L., Dudhia, A., Ehhalt, D., Endemann, M., Flaud, J.-M., Gessner, R., Kleinert, A., Koopman, R., Langen, J., López-Puertas, M., Mosner, P., Nett, H., Oelhaf, H., Perron, G., Remedios, J., Ridolfi, M., Stiller, G., and Zander, R., MIPAS: an instrument for atmospheric and climate research, Atmos. Chem. Phys. Discuss., 7, 8795&amp;ndash;8893, 2007. </reference>
		<reference numeration="8" content_type="text"> Frankenberg, C., Meirink, J. F., van Weele, M., Platt, U., and Wagner, T.: Assessing methane emissions from global space-borne observations: Science, 308, 1010&amp;ndash;1014, doi:10.1126/science.1106644, 2005. </reference>
		<reference numeration="9" content_type="text"> GLOBALVIEW-CH4: Cooperative Atmospheric Data Integration Project &amp;ndash; Methane. CD-ROM, NOAA ESRL, Boulder, Colorado; also available on Internet at \mboxhttp://www.esrl.noaa.gov/gmd/ccgg/globalview/ch4/ch4_intro.html, 2005. </reference>
		<reference numeration="10" content_type="text"> Gunson, M. R., Farmer, C. B., Norton, R. H., Zander, R., Rinsland, C. P., Shaw, J. H., and Gao, B. C.: Measurements of CH&lt;sub&gt;4&lt;/sub&gt;, N&lt;sub&gt;2&lt;/sub&gt;O, CO, H&lt;sub&gt;2&lt;/sub&gt;O, and O&lt;sub&gt;3&lt;/sub&gt; in the middle atmosphere by the ATMOS experiment on Spacelab 3, J. Geophys. Res., 95, 13 867&amp;ndash;13 882, 1990. </reference>
		<reference numeration="11" content_type="text"> Gunson, M. R., Abbas, M. M., Abrams, M. C., et al.: The Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment: Deployment on the ATLAS Space Shuttle missions, Geophys. Res. Lett., 23, 2333&amp;ndash;2336, 1996. </reference>
		<reference numeration="12" content_type="text"> Hase, F., Hannigan, J. W., Coffey, M. T., Goldman, A., Höpfner, M., Jones, N. B., Rinsland, C. P., and Wood, S. W.: Intercomparison of retrieval codes used for the analysis of high-resolution, ground-based FTIR measurements, J. Quant. Spectrosc. Ra. Trans., 87, 25&amp;ndash;52, 2004. </reference>
		<reference numeration="13" content_type="text"> Hauchecorne, A., Godin, S., Marchand, M., Heese, B., and Souprayen, C.: Quantification of the transport of chemical constituents from the polar vortex to midlatitudes in the lower stratosphere using the high-resolution advection model MIMOSA and effective diffusivity, J. Geophys. Res., 107, 8289, doi:10.1029/2001JD000491, 2002. </reference>
		<reference numeration="14" content_type="text"> Hoppel, K. W., Bowman, K. P., and Bevilacqua, R. M.: Northern Hemisphere summer ozone variability observed by POAM II, Geophys. Res. Lett., 26, 827&amp;ndash;830, 1999. </reference>
		<reference numeration="15" content_type="text"> Manney, G. L., Michelsen, H. A., Santee, M. L., Gunson, M. R., Irion, F. W., Roche, A. E., and Livesey, N. J.: Polar vortex dynamics during spring and fall diagnosed using trace gas observations from the Atmospheric Trace Molecule Spectroscopy instrument, J. Geophys. Res., 104, 18 841&amp;ndash;18 866, 1999. </reference>
		<reference numeration="16" content_type="text"> Manney, G. L., Michelsen, H. A., Irion, F. W., Gunson, M. R., Toon, G. C., and Roche, A. E.: Lamination and polar vortex development in fall from ATMOS long-lived trace gases observed during November 1994, J. Geophys. Res., 105, 29 023&amp;ndash;29 038, 2000. </reference>
		<reference numeration="17" content_type="text"> Manney, G. L., Michelsen, H. A., Bevilacqua, R. M., Gunson, M. R., Irion, F. W. Livesey, N. J., Oberheide, J., Riese, M., Russell III, J. M., Toon, G. C., and Zawodny, J. M.: Comparison of satellite ozone observations in coincident air masses in early November 1994, J. Geophys. Res., 106, 9923&amp;ndash;9944, 2001. </reference>
		<reference numeration="18" content_type="text"> Manney, G. L., Santee, M. L., Livesey, N. J., Froidevaux, L., Read, W. G., Pumphrey, H. C., Waters, J. W., and Pawson, S.: EOS Microwave Limb Sounder observations of the Antarctic polar vortex breakup in 2004, Geophys. Res. Lett., 32, L12811, doi:10.1029/2005GL022823, 2005. </reference>
		<reference numeration="19" content_type="text"> 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., (available at http://mls.jpl.nasa.gov), in press, 2007. </reference>
		<reference numeration="20" content_type="text"> McHugh, M., Magill, B., Walker, K. A., Boone, C. D., Bernath, P. F., and Russell, III, J. M.: Comparison of atmospheric retrievals from ACE and HALOE, Geophys. Res. Lett. 32, L15S10, doi:10.1029/2005GL022403, 2005. </reference>
		<reference numeration="21" content_type="text"> Mondelain, D., Payan, S., Deng, W., Camy-Peyret, C., Hurtmans, D., and Mantz, A. W.: Measurement of the temperature dependence of line mixing and pressure broadening parameters between 296 and 90 K in the $\nu _3$ band of $^12$CH&lt;sub&gt;4&lt;/sub&gt; and their influence on atmospheric methane retrievals, J Mol Spectrosc., 244, 130&amp;ndash;137, 2007. </reference>
		<reference numeration="22" content_type="text"> Moreau, G., Robert, C., Catoire, V., Chartier, M., Camy-Peyret, C., Huret, N., Pirre, M., Pomathiod, L., and Chalumeau, G.: SPIRALE: a multispecies in situ balloon-borne instrument with six tunable diode laser spectrometers, Appl. Opt., 44, 28, 5972&amp;ndash;5989, 2005. </reference>
		<reference numeration="23" content_type="text"> Nassar, R., Bernath, P. F., Boone, C. D., Manney, G. L., McLeod, S. D., Rinsland, C. P., Skelton, R., and Walker, K. A.: Stratospheric abundances of water and methane based on ACE-FTS measurements, Geophys. Res. Lett., 32, L15S04, doi:10.1029/2005GL022383, 2005. </reference>
		<reference numeration="24" content_type="text"> Park, J. H., Russell III, J. M., Gordley, L. L., Drayson, S. R., Benner, D. C., McInerney, J. M., Gunson, M. R., Toon, G. C., Sen, B., Blavier, J.-F., Webster, C. R., Zipf, E. C., Erdman, P., Schmidt, U., and Schiller, C.: Validation of Halogen Occultation Experiment CH&lt;sub&gt;4&lt;/sub&gt; measurements from the UARS, J. Geophys. Res., 101, D6, 10 183&amp;ndash;10 203, 1996. </reference>
		<reference numeration="25" content_type="text"> Payan, S., Camy-Peyret, C., Oelhaf, H., Wetzel, G., Maucher, G., Kleim, C., Pirre, M., Engel, A., Volk, M. C., Kuttippurath, J., Cortesi, U., Raspollini, P., Vigouroux, C., De Mazière, M., Piccolo, C., Payne, V., Bracher, A., Glatthor, N., Stiller, G., Grunow, K., and Butz, A.: Validation and data characteristics of methane and nitrous oxide profiles observed by MIPAS and processed with Version 4.61 algorithm, Atmos. Chem. Phys. Discuss., accepted, 2007. </reference>
		<reference numeration="26" content_type="text"> Piccolo, C. and Dudhia, A.: Precision validation of MIPAS-Envisat products, Atmos. Chem. Phys., 7, 1915&amp;ndash;1923, 2007. </reference>
		<reference numeration="27" content_type="text"> Raspollini, P., Belotti, C., Burgess, A., Carli, B., Carlotti, M., Ceccherini, S., Dinelli, B. M., Dudhia, A., Flaud, J.-M., Funke, B., Höpfner, Lopez-Puertas, M., Payne, V., Piccolo, C., Remedios, J. J., Ridolfi, M., and Spang, R.: MIPAS level 2 operational analysis, Special Issue MIPAS: Potential of the experiment, data processing and validation of results, edited by: Espy, P. J. and Hartogh, P., Atmos. Chem. Phys., 6, 5605&amp;ndash;5630, 2006. </reference>
		<reference numeration="28" content_type="text"> Reber, C. A., Trevathan, C. E., McNeal, R. J., and Luther, M. R.: The Upper Atmosphere Research Satellite (UARS) mission, J. Geophys. Res., 98, 10 643&amp;ndash;10 647, doi:10.1029/92JD02828, 1993. </reference>
		<reference numeration="29" content_type="text"> Remedios, J. J., Ruth, S. L., Rodgers, C. D., Taylor, F. W., Roche, A. E., Gille, J. C., Gunson, M. R., Russell III, J. M., Park, J., Zipf, E. C., and Erdman, P. W.: Measurements of methane and nitrous oxide distributions by the improved stratospheric and mesospheric sounder: Retrieval and validation, J. Geophys. Res., 101, 9843&amp;ndash;9871, 1996. </reference>
		<reference numeration="30" content_type="text"> Remedios, J. J.: Extreme Atmospheric Constituent Profiles for MIPAS, Proceedings of the European symposium on atmospheric measurements from space, ESTEC, Netherlands, 20&amp;ndash;22 January, 2, 779&amp;ndash;783, 1999. </reference>
		<reference numeration="31" content_type="text"> Remedios, J. J., Leigh, R. J., Waterfall, A. M., Moore, D. P., Sembhi, H., Parkes, I., Greenhough, J., Chipperfield, M. P., and Hauglustaine, D.: MIPAS reference atmospheres and comparisons to V4.61/V4.62 MIPAS level 2 geophysical data sets, Special Issue &quot;MIPAS: Potential of the experiment, data processing and validation of results&quot;, edited by: Espy, P. J. and Hartogh, P., Atmos. Chem. Phys. Discuss., 7, 9973&amp;ndash;10017, 2007. </reference>
		<reference numeration="32" content_type="text"> Ridolfi, M., Carli, B., Carlotti, M., von Clarmann, T., Dinelli, B. M., Dudhia, A., Flaud, J.-M., Höpfner, M., Morris, P. E., Raspollini, P., Stiller, G., and Wells, R. J.: Optimized forward model and retrieval scheme for MIPAS near-real-time data processing, Appl. Opt., 39, 1323&amp;ndash;1340, 2000. </reference>
		<reference numeration="33" content_type="text"> Roche, A. E.,Kumer, J. B., Nightingale, R. W., Mergenthaler, J. L., Ely, G. A., Bailey, P. L., Massie, S. T., Gille, J. C., Edwards, D. P., Gunson, M. R., Abrams, M. C., Toon, G. C., Webster, C. R., Traub, W. A., Jucks, K. W., Johnson, D. G., Murcray, D. G., Murcray, F. H., Goldman, A., and Zipf, E. C.: Validation of CH&lt;sub&gt;4&lt;/sub&gt; and N&lt;sub&gt;2&lt;/sub&gt;O measurements by the CLAES instrument on the Upper Atmospheric Research Satellite, J. Geophys. Res., 101, 9679&amp;ndash;9710, 1996. </reference>
		<reference numeration="34" content_type="text"> Rodgers, C. D.: Inverse methods for atmospheric sounding: Theory and Practice, Series on Atmospheric, Oceanic and Planetary Physics, 2, World Scientific Publishing Co., Singapore, 2000. </reference>
		<reference numeration="35" content_type="text"> Rodgers, C. D. and Connor, B. J.: Intercomparison of remote sounding instruments, J. Geophys. Res., 108, 4116&amp;ndash;4129, 2003. </reference>
		<reference numeration="36" content_type="text"> 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., 30 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. Trans., 96, 139&amp;ndash;204, 2005. </reference>
		<reference numeration="37" content_type="text"> Schoeberl, M. R., Lait, L. R., Newman, P. A., and Rosenfield, J. E.: The structure of the polar vortex, J. Geophys. Res., 97, 7859&amp;ndash;7882, 1992. </reference>
		<reference numeration="38" content_type="text"> Schoeberl, M. R., Luo, M., and Rosenfield, J. E.: An analysis of the Antarctic Halogen Occultation Experiment trace gas observations, J. Geophys. Res., 100, 5159&amp;ndash;5172, 1995. </reference>
		<reference numeration="39" content_type="text"> Vigouroux, C., De Mazière, M., Errera, Q., Mahieu, E., Duchatelet, P., Wood, S., Smale, D., Mikuteit, S., Blumenstock, T., Hase, F., and Jones, N.: Comparisons between ground-based FTIR and MIPAS N&lt;sub&gt;2&lt;/sub&gt;O and HNO&lt;sub&gt;3&lt;/sub&gt; profiles before and after assimilation in BASCOE, Atmos. Chem. Phys., 7, 377&amp;ndash;396, 2007. </reference>
		<reference numeration="40" content_type="text"> Wahlen, M.: The Global Methane Cycle, Annu. Rev. Earth Pl. Sc., 21, 407&amp;ndash;426, 1993. </reference>
	</references>
</article>

