[en] Long-term time series of hydrogen chloride (HCl) and chlorine nitrate (ClONO2) total column abundances has been retrieved from high spectral resolution ground-based solar absorption spectra recorded with infrared Fourier transform spectrometers at nine NDSC (Network for the Detection of Stratospheric Change) sites in both Northern and Southern Hemispheres. The data sets span up to 24 years and most extend until the end of 2001. The time series of Cly (defined here as the sum of the HCl and ClONO2 columns) from the three locations with the longest time-span records show rapid increases until the early 1990s superimposed on marked day-to-day, seasonal and inter-annual variability. Subsequently, the buildup in Cly slows and reaches a broad plateau after 1996, also characterized by variability. A similar time evolution is also found in the total chlorine concentration at 55 km altitude derived from Halogen Occultation
Experiment (HALOE) global observations since 1991. The stabilization of inorganic chlorine observed in both the total columns and at 55 km altitude indicates that the near-global 1993 organic chlorine (CCly) peak at the Earth’s surface has now propagated over a broad altitude range in the upper atmosphere, though the time lag is difficult to quantify precisely from the current data sets, due to variability. We compare the three longest measured time series with two-dimensional model calculations extending from 1977 to 2010, based on a halocarbon scenario that assumes past measured trends and a realistic extrapolation into the future. The model predicts broad Cly maxima consistent with the long-term observations, followed by a
slow Cly decline reaching 12–14% relative to the peak by 2010. The data reported here confirm the effectiveness of the Montreal Protocol and its Amendments and Adjustments in progressively phasing out the major man-related perturbations of the stratospheric ozone layer, in particular, the anthropogenic chlorine-bearing source gases.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Rinsland, Curtis P.; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Mahieu, Emmanuel ; Université de Liège - ULiège > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences)
Zander, Rodolphe ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Jones, Nicholas B.; University of Denver > Department of Physics
Abrams, M. C., G. C. Toon, and R. A. Schindler, Practical example of the correction of Fourier-transform spectra for detector nonlinearity, Appl. Opt., 33, 6307-6314, 1994.
Ackerman, M., D. Frimout, A. Girard, M. Gottignies, and C. Muller, Stratospheric HCl from infrared spectra, Geophys. Res. Lett., 3, 81-83, 1976.
Anderson, J., J. M. Russell III, S. Solomon, and L. E. Deaver, Halogen occultation experiment confirmation of stratospheric chlorine decreases in accordance with the Montreal protocol, J. Geophys. Res., 105, 4483-4490, 2000.
Ballard, J., W. B. Johnston, M. R. Gunson, and P. T. Wassell, Absolute absorption coefficients of ClONO2 infrared bands at stratospheric temperatures, J. Geophys. Res., 93, 1659-1665, 1988.
Bell, W., G. Duxbury, and D. D. Stuart, High-resolution spectra of the v4 band of chlorine nitrate, J. Mol. Spectrosc., 152, 283-297, 1992.
Birk, M., and G. Wagner, A new spectroscopic database for chlorine nitrate, poster presented at Sixth Biennial Hitran Database Conference, Harvard-Smithsonian Cent. for Astrophys., Cambridge, Mass., 19-21 June 2000.
Brasseur, G., M. H. Hitchman, S. Walters, M. Dymek, E. Falise, and M. Pirre, An interactive chemical dynamical two-dimensional model of the middle atmosphere, J. Geophys. Res., 95, 5639-5655, 1990.
Brault, J. W., Solar Fourier transform spectroscopy, in Proceedings of the JOSO Workshop, Future Solar Optical Observations, Needs and Constraints, edited by G. Godoli, G. Noci, and A. Righin, pp. 33-52, Florence, Italy, 1978.
Brinksma, E. J., et al., Analysis of record-low ozone values during the 1997 winter over Lauder, New Zealand, Geophys. Res. Lett., 25, 2785-2788, 1998.
Chipperfield, M. P., Multiannual simulations with a three-dimensional chemical transport model, J. Geophys. Res., 104, 1781-1805, 1999.
Cicerone, R. J., Halogens in the atmosphere, Rev. Geophys., 19, 123-139, 1981.
Cleveland, W. S., and S. J. Devlin, Locally-weighted regression: An approach to regression analysis by local fitting, JASA J. Am. Stat. Assoc., 83, 596-610, 1988.
Coffey, M. T., Observations of the impact of volcanic activity on stratospheric chemistry, J. Geophys. Res., 101, 6767-6780, 1996.
Committee on Extension of the U. S. Standard Atmosphere (COESTA), U. S. Standard Atmosphere 1976, 227 pp., Govt. Print. Off., Washington, D. C., 1976.
Connor, B. J., A. Parrish, J.-J. Tsou, and M. P. McCormick, Error analysis for the ground-based microwave ozone measurements during STOIC, J. Geophys. Res., 100, 9283-9291, 1995.
Connor, B. J., N. B. Jones, S. W. Wood, J. G. Keys, C. P. Rinsland, and F. J. Murcray, Retrieval of HCl and HNO3 profiles from ground-based FTIR data using SFIT2, in Proceedings of 18th Quadrennial Ozone Symposium, edited by R. Bojkov and G. Visconti, pp. 485-488, Parco Sci. e Technol. D'Abruzzo, L'Aquila, Italy, 1996.
Considine, G. D., L. E. Deaver, E. E. Remsberg, and J. M. Russell III, Analysis of near-global trends and variability in halogen occultation experiment HF and HCl data in the middle atmosphere, J. Geophys. Res., 104, 24,297-24,308, 1999.
Crutzen, P. J., I. S. A. Isaksen, and J. R. McAfee, The impact of the chlorocarbon industry on the ozone layer, J. Geophys. Res., 83, 345-363, 1978.
Douglass, A. R., M. R. Schoeberl, R. S. Stolarski, J. W. Waters, J. M. Russell III, A. E. Roche, and S. T. Massie, Interhemispheric differences in springtime production of HCl and ClONO2 in the polar vortices, J. Geophys. Res., 100, 13,967-13,978, 1995.
Engel, A., M. M. Strunk, M. Müller, H.-P. Haase, C. Poss, I. Levin, and U. Schmidt, Temporal development of total chlorine in the high-latitude stratosphere based on reference distributions of mean age derived from CO2 and SF6, J. Geophys. Res., 107(D12), 4136, doi:10.1029/2001JD000584, 2002.
Farmer, C. B., O. F. Raper, and R. H. Norton, Spectroscopic detection and vertical distribution of HCl in the troposphere and stratosphere, Geophys. Res. Lett., 3, 13-16, 1976.
Farmer, C. B., G. C. Toon, P. W. Schaper, J.-F. Blavier, and L. L. Lowes, Stratospheric trace gases in the spring 1986 Antarctic atmosphere, Nature, 329, 126-130, 1987.
Gallery, W. O., F. X. Kneizys, and S. A. Clough, Air mass computer program for atmospheric transmittance/radiance calculation: FSCATM, Environ. Res. Pap.828(AFGL-TR-83-0065), 145 pp., Opt. Phys. Div., U.S. Air Force Geophys. Lab., Bedford, Mass., 1983.
Goldman, A., C. Paton Walsh, W. Bell, G. C. Toon, J.-F. Blavier, B. Sen, M. T. Coffey, J. W. Hannigan, and W. G. Mankin, Network for the detection of stratospheric change Fourier transform infrared intercomparison at Table Mountain Facility, November 1996, J. Geophys. Res., 104, 30,481-30,503, 1999.
Griffith, D. W. T., N. B. Jones, and W. A. Mathews, Interhemispheric ratio and annual cycle of carbonyl sulfide (OCS) total column from ground-based solar FTIR spectra, J. Geophys. Res., 103, 8447-8454, 1998.
Gunson, M. R., M. C. Abrams, L. L. Lowes, E. Mahieu, R. Zander, C. P. Rinsland, M. K. W. Ko, N. D. Sze, and D. K. Weisenstein, Increase in levels of stratospheric chlorine and fluorine loading between 1985 and 1992, Geophys. Res. Lett., 21, 2223-2226, 1994.
Hase, F., Retrieval of trace gas profiles from high resolution, ground-based FTIR measurements, Ph.D. thesis, Wissenschaftliche Berichte FZKA6512, Forschungszentrum Karlsruhe, 2000.
Hase, F., T. Blumenstock, and C. Paton-Walsh, Analysis of the instrumental line shape of high-resolution Fourier transform 1R spectrometers with gas cell measurements and new retrieval software, Appl. Opt., 38, 3417-3422, 1999.
Höpfner, M., G. P. Stiller, T. Kuntz, T. v. Clarmann, G. Echle, B. Funke, N. Glattohr, F. Hase, H. Kemnitzer, and S. Zorn, Karlsruhe optimized and precise radiative transfer algorithm, II, Interface to retrieval applications, in Optical Remote Sensing of the Atmosphere and Clouds, edited by J. Wang et al., Proc. SPIE 3501, 186-195, 1998.
Irion, F. W., et al., The Atmospheric Trace Molecule Spectroscopy Experiment (ATMOS) version 3 data retrievals, Appl. Opt., 41, 6968-6979, 2002.
Jackman, C. H., E. L. Fleming, S. Chandra, D. B. Considine, and J. E. Rosenfield, Past, present, and future modeled ozone trends with comparisons to observed trends, J. Geophys. Res., 101, 28,753-28,767, 1996.
Kinnersley, J. S., The climatology of the stratospheric "thin air" model, Q. J. R. Meteorol. Soc., 122, 219-252, 1996.
Koike, M., N. B. Jones, W. A. Matthews, P. V. Johnston, R. L. McKenzie, D. Kinnison, and J. Rodriguez, Impact of Pinatubo aerosols on the partitioning between NO2 and HNO3, Geophys. Res. Lett., 21, 597-600, 1994.
Kuntz, M., M. Höpfner, G. P. Stiller, T. v. Clarmann, H. Echle, B. Funke, N. Glattohr, F. Hase, H. Kemnitzer, and S. Zorn, Karlsruhe optimized and precise radiative transfer algorithm, III, ADDLIN and TRANSF algorithms for modeling spectral transmittance and radiance, in Optical Remote Sensing of the Atmosphere and Clouds, edited by J. Wang et al., Proc. SPIE3501, 247-256, 1998.
Kurylo, M. J., Network for the detection of stratospheric change (NDSC), Proc. Soc. Photo-Opt. Instrum. Eng., 1491, 168-174, 1991.
Kurylo, M. J., and R. J. Zander, The NDSC-Its status after 10 years of operation, paper presented at 19th Quadrennial Ozone Symposium, Hokkaido Univ., Sapporo, Japan, 3-8 July 2000.
Mahieu, E., R. Zander, L. Delbouille, P. Demoulin, G. Roland, and C. Servais, Observed trends in total vertical column abundances of atmospheric gases from IR solar spectra recorded at the Jungfraujoch, J. Atmos. Chem., 28, 227-243, 1997.
Mahieu, E., R. Zander, P. Demoulin, M. De Maziére, F. Mélen, C. Servais, G. Roland, L. Delbouille, J. Poels, and R. Blomme, Fifteen years-trend characteristics of key stratospheric constituents monitored by FTIR above the Jungfraujoch, in Proceedings of the 5th European Symposium on Stratospheric Ozone, Air Pollut. Res. Rep. 73-EUR 19340, edited by N. R. P. Harris, M. Guirlet, and G. T. Amanatidis, pp. 99-102, Eur. Ozone Res. Coord. Unit, Cambridge, UK, 2000.
Mankin, W. G., and M. T. Coffey, Latitudinal distributions and temporal changes of stratospheric HCl and HF, J. Geophys. Res., 88, 10,776-10,784, 1983.
Mankin, W. G., and M. T. Coffey, Increased stratospheric hydrogen chloride in the El Chichón cloud, Science, 226, 170-172, 1984.
Mankin, W. G., M. T. Coffey, and A. Goldman, Airborne observations of SO2, HCl, and O3 in the stratospheric plume of the Pinatubo volcano in July 1991, Geophys. Res. Lett., 19, 179-182, 1992.
Matthews, W. A., P. V. Johnson, D. G. Murcray, F. J. Murcray, and R. D. Blatherwick, Column abundances of hydrogen chloride above Lauder, New Zealand, in Ozone in the Atmosphere, edited by R. D. Bojkov and P. Fabian, pp. 359-361, A. Deepak, Hampton, Va., 1989.
Meier, A., A. Goldman, P. S. Manning, T. M. Stephen, C. P. Rinsland, N. B. Jones, and S. W. Wood, Improvements to air mass calculations from ground-based infrared measurements, J. Quant. Spectrosc. Radiat. Transfer, in press, 2003.
Michelsen, H. A., C. M. Spivakovsky, and S. C. Wofsy, Aerosol-mediated partitioning of stratospheric Cly, and NOy at temperatures above 200 K, Geophys. Res. Lett., 26, 299-302, 1999.
Molina, M. J., and F. S. Rowland, Stratospheric sink for chlorofluoromethanes: Chlorine atom-catalysed destruction of ozone, Nature, 249, 810-812, 1974.
Montzka, S. A., J. H. Butler, R. C. Myers, T. M. Thompson, T. H. Swanson, A. D. Clarke, L. T. Lock, and J. W. Elkins, Decline in the tropospheric abundance of halogen from halocarbons: Implications for stratospheric ozone depletion, Science, 272, 1318-1322, 1996.
Montzka, S. A., J. H. Butler, J. W. Elkins, T. M. Thompson, A. D. Clarke, and L. T. Lock, Present and future trends in the atmospheric burden of ozone-depleting halogens, Nature, 398, 690-694, 1999.
Murcray, F. J., A. Matthews, A. Goldman, P. Johnston, and C. P. Rinsland, NH3 column abundances over Lauder, New Zealand, J. Geophys. Res., 94, 2235-2238, 1989.
Norton, R. J., and C. P. Rinsland, ATMOS data processing and science analysis methods, Appl. Opt., 30, 389-400, 1991.
Notholt, J., The moon as light source for FTIR measurements of stratospheric trace gases during the polar night: Application for HNO3 in the Arctic, J. Geophys. Res., 99, 3607-3614, 1994.
Notholt, J., and O. Schrems, Ground-based FTIR spectroscopic measurements of stratospheric trace gases in the Arctic with the Sun and moon as light sources, J. Mol. Struct., 347, 407-416, 1995.
Notholt, J., A. Meier, and S. Peil, Total column densities of tropospheric and stratospheric trace gases in the undisturbed arctic summer atmosphere, J. Atmos. Chem., 20, 311-332, 1995.
Notholt, J., G. C. Toon, F. Stordal, S. Solberg, N. Schmidbauer, E. Becker, A. Meier, and B. Sen, Seasonal variations of atmospheric trace gases in the high arctic at 79°N, J. Geophys. Res., 102, 12,855-12,861, 1997a.
Notholt, J., G. C. Toon, R. Lehmann, B. Sen, and J.-F. Blavier, Comparison of Arctic and Antarctic trace gas column abundances from ground-based Fourier transform infrared spectrometry, J. Geophys. Res., 102, 12,863-12,869, 1997b.
Parrish, A., B. J. Connor, J. J. Tsou, I. S. McDermid, and W. G. Chu, Ground-based microwave monitoring of stratospheric ozone, J. Geophys. Res., 97, 2541-2546, 1992.
Penkett, S. A., R. G. Derwent, P. Fabian, R. Borchers, and U. Schmidt, Methyl chloride in the stratosphere, Nature, 283, 58-60, 1980.
Peterson, D. B., and J. M. Margitan (Eds.), Upper Atmosphere Research Satellite Correlative Measurements Program (UARS-CMP) Balloon Data Atlas, NASA, Washington, D. C., 1995.
Pougatchev, N. S., B. J. Connor, and C. P. Rinsland, Infrared measurements of the ozone vertical distribution above Kitt Peak, J. Geophys. Res., 100, 16,689-16,697, 1995.
Prinn, R. G., et al., A history of chemically and radiatively important gases in air deduced from ALE/GAGE/AGAGE, J. Geophys. Res., 105, 17,751-17,792, 2000.
Randel, W. J., F. Wu, J. M. Russell, and J. W. Waters, Space-time patterns of trends in stratospheric constituents derived from UARS measurements, J. Geophys. Res., 104, 3711-3727, 1999.
Raper, O. F., C. B. Farmer, R. Zander, and J. H. Park, Infrared spectroscopic measurements of halogenated sink and reservoir gases in the stratosphere with the ATMOS instrument, J. Geophys. Res., 92, 9851-9858, 1987.
Reisinger, A. R., N. B. Jones, W. A. Matthews, and C. P. Rinsland, Southern hemisphere midlatitude ground based measurements of ClONO2: Method of analysis, seasonal cycle and long-term trend, J. Geophys. Res., 100, 23,183-23,193, 1995.
Rinsland, C. P., M. A. H. Smith, P. L. Rinsland, A. Goldman, J. W. Brault, and G. M. Stokes, Ground-based infrared spectroscopic measurements of atmospheric hydrogen cyanide, J. Geophys. Res., 87, 11,119- 11,125, 1982.
Rinsland, C. P., A. Goldman, F. J. Murcray, F. H. Murcray, R. D. Blatherwick, and D. G. Murcray, Infrared measurements of atmospheric gases above Mauna Loa, Hawaii, in February 1987, J. Geophys. Res., 91, 12,607-12,626, 1988.
Rinsland, C. P., J. S. Levine, A. Goldman, N. D. Sze, M. K. W. Ko, and D. W. Johnson, Infrared measurements of HF and HCl total column abundances above Kitt Peak, 1977-1990: Seasonal cycles, long-term increases, and comparisons with model calculations, J. Geophys. Res., 96, 15,523-15,540, 1991.
Rinsland, C. P., M. R. Gunson, M. C. Abrams, R. Zander, E. Mahieu, A. Goldman, M. K. W. Ko, J. M. Rodriguez, and N. D. Sze, Profiles of stratospheric chlorine nitrate (ClONO2) from atmospheric trace molecule spectroscopy/ATLAS 1 infrared solar occultation spectra, J. Geophys. Res., 99, 18,895-18,900, 1994.
Rinsland, C. P., R. Zander, P. Demoulin, and E. Mahieu, ClONO2 total vertical column abundances above the Jungfraujoch station: 1986-1994: Long-term trend and winter-spring enhancements, J. Geophys. Res., 101, 3891-3899, 1996.
Rinsland, C. P., et al., Northern and Southern hemisphere ground-based infrared spectroscopic measurements of tropospheric carbon monoxide and ethane, J. Geophys. Res., 103, 28,197-28,217, 1998.
Rinsland, C. P., et al., Infrared solar spectroscopic measurements of free tropospheric CO, C2H6, and HCN above Mauna Loa, Hawaii: Seasonal variations and evidence for enhanced emissions from the southeast Asian tropical fires of 1997-1998. J. Geophys. Res., 104, 18,667-18,680, 1999.
Rinsland, C. P., E. Mahieu, R. Zander, P. Demoulin, J. Forrer, and B. Buchmann, Free tropospheric CO, C2H6, and HCN above central Europe: Recent measurements from the Jungfraujoch station including the detection of elevated columns during 1998, J. Geophys. Res., 105, 24,235-24,249, 2000a.
Rinsland, C. P., et al., Correlation relationships of stratospheric molecular constituents from high spectral resolution, ground-based infrared solar absorption spectra, J. Geophys. Res., 105, 14,637-14,652, 2000b.
Rinsland, C. P., A. Meier, and D. W. T. Griffith, Ground-based measurements of tropospheric CO, C2H6, and HCN from Australia at 34°S latitude during 1997-1998, J. Geophys. Res., 106, 20,913-20,924, 2001.
Rodgers, C. D., Characterization and error analysis of profiles retrieved from remote sounding measurements, J. Geophys. Res., 95, 5587-5595, 1990.
Rothman, L. S., et al., The HITRAN molecular database: Editions of 1991 and 1992, J. Quant. Spectrosc. Radiat. Transfer, 48, 469-507, 1992.
Rothman, L. S., et al., The HITRAN molecular spectroscopic database and HAWKS (HITRAN atmospheric workstation), J. Quant. Spectrosc. Radiat. Transfer, 60, 665-710, 1998.
Russell, J. M., III, L. L. Gordley, J. H. Park, S. R. Drayson, D. H. Hesketh, R. J. Cicerone, A. F. Tuck, J. E. Frederick, J. E. Harries, and P. J. Crutzen, The halogen occultation experiment, J. Geophys. Res., 98, 10,777-10,797, 1993.
Russell, J. M., III, et al., Validation of hydrogen chloride measurements made by the halogen occultation experiment from the UARS platform, J. eophys. Res., 101, 10,151-10,162, 1996.
Ryan, J. A., and N. R. Mukherjee, Sources of stratospheric gaseous chlorine, Rev. Geophys., 13, 650-658, 1975.
Solomon, S., R. W. Portmann, R. R. Garcia, W. Randel, F. Wu, R. Nagatani, J. Gleason, L. Thomason, L. R. Poole, and M. P. McCormick, Ozone depletion at mid-latitudes: Coupling of volcanic aerosols and temperature variability to anthropogenic chlorine, Geophys. Res. Lett., 25, 1871-1874, 1998.
Stiller, G. P., et al., Karlsruhe optimized and precise radiative transfer algorithm, I. Requirements, justification and model error estimation, in Optical Remote Sensing of the Atmosphere and Clouds, edited by J. Wang et al., Proc. SPIE 3501, 257-268, 1998.
Sussmann, R., Ground-based Fourier transform spectrometry at the NDSC site Zugspitze: Geophysical products for satellite validation, Proc. Eur. Symp. Atmos. Meas. Space, ESTEC. Noordwijk, The Netherlands, Jan. 18-22 1999, WPP-161, 2, 661-664, 1999.
Sussmann, R., and K. Schäfer, Infrared spectroscopy of tropospheric trace gases: Combined analysis of horizontal and vertical column abundances, Appl. Opt., 36, 735-774, 1997.
Sussmann, R., and W. Wimmer, A subtropical intrusion in February 1998 analyzed by ground-based FTIR spectrometry at the NDSC site Zugspitze at 47.4°N, Proc. 5th Eur. Workshop on Stratos. Ozone, Air Pollut. Res. Rep. 73, edited by N. R. P. Harris, M. Guirlet, and G. T. Amanatidis, pp. 594-597, Res. Environ. and Sustain. Dev. Prog., 2000.
Toon, G. C., The JPL MkIV interferometer, Opt. Photonic News, 2, 19-21, 1991.
Toon, G. C., J.-F. Blavier, B. Sen, R. J. Salawitch, G. B. Osterman, J. Notholt, M. Rex, C. T. McElroy, and J. M. Russell III, Ground-based observations of Arctic ozone loss during spring and summer 1997, J. Geophys. Res., 104, 26,497-26,510, 1999.
Toth, R. A., Water vapor measurements between 590 and 2582 cm-1, J. Mol. Spectrosc., 190, 379-396, 1998.
Wagner, G., M. Birk, F. Schreier, and J.-F. Flaud, A new spectroscopic database for the ozone fundamentals, paper presented at 6th biennial HITRAN database conference, Harvard-Smithsonian Cent. for Astrophys., Cambridge, Mass., 2000.
Wallace, L., and W. Livingston, Spectroscopic observations of atmospheric trace gases over Kitt Peak, 3, Long-term trends of hydrogen chloride and hydrogen fluoride from 1978 to 1990, J. Geophys. Res., 96, 15,513-15,521, 1991.
Wallace, L., W. Livingston, and D. N. B. Hall, A twenty-five year record of stratospheric hydrogen chloride, Geophys. Res. Lett., 24, 2363-2366, 1997.
Waugh, D. W., D. B. Considine, and E. L. Fleming, Is upper stratospheric chlorine decreasing as expected?, Geophys. Res. Lett., 28, 1187-1190, 2001.
Webster, C. R., H. A. Michelsen, M. R. Gunson, J. J. Margitan, J. M. Russell III, G. C. Toon, and W. A. Traub, Response of lower stratospheric HCl/Cly to volcanic aerosol: Observations from aircraft, balloon, space shuttle, and satellite instrumentation, J. Geophys. Res., 105, 11,711-11,719, 2000.
Wood, S. W., N. B. Jones, C. P. Rinsland, A. Goldman, B. J. Connor, T. M. Stephen, B. N. Lawrence, and F. J. Murcray, Retrieval of vertical trace gas profiles from ground-based infrared absorption spectra inside and outside the Antarctic vortex using SFIT2, paper presented at Spring Meeting, AGU, Boston, Mass., 29 May-2 June 2001.
World Meterological Organization (WMO), Atmospheric Ozone 1985: Assessment of our understanding of the processes controlling its present distribution and change, in World Meteorological Organization, Global Ozone Research and Monitoring Project-Rep. 16, Geneva, 1986.
World Meteorological Organization (WMO), Scientific Assessment of ozone depletion: 1998, in WMO Rep. 38, U.N. Environ. Program., Geneva, 1999.
World Meteorological Organization (WMO), Scientific Assessment of ozone depletion: 2002, in WMO Rep. xx, U.N. Environmental Programme, Geneva, 2003.
Zander, R., and Ph. Demoulin, Spectroscopic evidence for the presence of the v4-Q branch of chlorine nitrate in ground-based infrared solar spectra, J. Atmos. Chem., 6, 191-200, 1988.
Zander, R., C. P. Rinsland, C. B. Farmer, L. R. Brown, and R. H. Norton, Observation of several chlorine nitrate (ClONO2) bands in stratospheric infrared spectra, Geophys. Res. Lett., 13, 757-760, 1986.
Zander, R., G. Roland, L. Delbouille, A. Saval, C. B. Farmer, and R. H. Norton, Column abundance and the long-term trend of hydrogen chloride (HCl) above the Jungfraujoch station, J. Atmos. Chem., 5, 395-404, 1987.
Zander, R., M. R. Gunson, C. B. Farmer, C. P. Rinsland, F. W. Irion, and E. Mahieu, The 1985 chlorine and fluorine inventories in the stratosphere based on ATMOS observations at 30°N latitude, J. Atmos. Chem., 15, 171-186, 1992.
Zander, R., E. Mahieu, and Ph. Demoulin, Monitoring of stratospheric changes at the Jungfraujoch station by high resolution infrared solar observations in support of the network for the detection of stratospheric change, in The Role of the Stratosphere in Global Change, NATO ASI Ser., vol. 18, edited by M. L. Chanin, Springer-Verlag, New York, 1993a.
Zander, R., P. Demoulin, E. Mahieu, G. P. Adrian, C. P. Rinsland, and A. Goldman, ESMOS II/NDSC IR spectral fitting algorithms intercomparison exercise, in Proceedings of the Atmospheric Spectroscopic Applications Workshop, edited by A. Barbe and L. Rothman, pp. 7-12, Univ. of Reims, Champaigne-Ardenne, France, 1993b.
Zander, R., et al., The 1994 northern midlatitude budget of stratospheric chlorine derived from ATMOS/ATLAS-3 observations, Geophys. Res. Lett., 23, 2357-2360, 1996.
Zander, R., P. Demoulin, E. Mahieu, L. Delbouille, G. Roland, F. Mélen, C. Servais, M. De Mazière, and M. Van Roozendael, An overview of NDSC-related activities at the Jungfraujoch through high-resolution infrared solar observations, in Atmospheric Ozone: Proceedings of the 28th Quadrennial Ozone symposium, edited by R. D. Bojkov and G. Visconti, pp. 1005-1008, Parco Sci. e Technol. D'Abruzzo, L'Aquila, Italy, 1998.
Zander, R., P. M. Midgley, and M. J. Kurylo, The NDSC in support of satellite data validation and calibration, in Proc. of ESAMS '99-Eur. Symp. on Atmos. Meas. from Space-ESTEC, Noordwijk, 19-22 Jan. 1999, WPP-161, 2, 649-654, 1999.