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1. Global validation of ENVISAT ozone profiles using lidar measurements

Author

Wolfgang Steinbrecht, Hans Claude, Sophie Godin-Beekmann, Kevin Strawbridge, I. S. McDermid, Georg Hansen, Eduardo Quel, Hideaki Nakane, D. P. J. Swart, Thierry Leblanc, Yasjka Meijer, Elian Wolfram, Boyan Tatarov, Thorsten Fehr, P. von der Gathen, J. A. E. van Gijsel, Jean-Luc Baray, National Institute for Public Health and the Environment [Bilthoven] (RIVM), Laboratoire de l'Atmosphère et des Cyclones (LACy), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Météo France, Meteorologisches Observatorium Hohenpeißenberg (MOHp), Deutscher Wetterdienst [Offenbach] (DWD), European Space Research Institute (ESRIN), European Space Agency (ESA), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Norwegian Institute for Air Research (NILU), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), National Institute for Environmental Studies (NIES), Centro de Investigaciones en Láseres y Aplicaciones [Buenos Aires] (CEILAP), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Instituto de Investigaciones Científicas y Técnicas para la Defensa (CITEDEF), Centre for Atmospheric Research Experiments (CARE), Environment and Climate Change Canada, Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, and Agence Spatiale Européenne = European Space Agency (ESA)

Subjects
Ozone, 010504 meteorology & atmospheric sciences, Meteorology, Instrumentation, 0211 other engineering and technologies, 02 engineering and technology, 7. Clean energy, 01 natural sciences, Ciencias de la Tierra y relacionadas con el Medio Ambiente, chemistry.chemical_compound, Montreal Protocol, Trend surface analysis, Time series, Ozono, ComputingMilieux_MISCELLANEOUS, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Remote sensing, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], SCIAMACHY, Lidar, chemistry, 13. Climate action, General Earth and Planetary Sciences, Environmental science, Satellite, Meteorología y Ciencias Atmosféricas, CIENCIAS NATURALES Y EXACTAS
Abstract

Satellite sensors provide global measurements of ozone concentration that can be used to study the effects of the implementation of the Montreal Protocol. However, a key issue in deriving long-term ozone trends from successive satellite instruments is inter-comparability. Ground-based measurements offer continuous time series, but only at a few locations. The combination of ground-based measurements with satellite data is therefore an effective means to evaluate satellite instrument inter-comparability. In this study, we present validation results of ozone profiles from three atmospheric sensors onboard ENVISAT by comparison with lidar measurements. Results for the SCIAMACHY ozone profiles (version 3.01) show reasonable agreement with ground-based measurements (0 to -20%). The MIPAS full-resolution (version 4.61) dataset has good agreement with lidar (0 to 10%), whereas a small positive bias (up to 20%) was found for the MIPAS reduced-resolution prototype data. GOMOS dark-limb data (version 5.00) agree very well (0 ± 5%) with the correlative data, but underestimate ozone concentration at the polar regions. Fil: van Gijsel, J. A. E.. National Institute for Public Health and the Environment; Países Bajos Fil: Swart, D. P. J.. National Institute for Public Health and the Environment; Países Bajos Fil: Baray, J. L.. Université de la Reunión; Francia Fil: Claude, H.. Meteorological Observatory Hohenpeissenberg; Alemania Fil: Fehr, T.. European Space Agency; Italia Fil: von der Gathen, P.. Alfred Wegener Institute; Alemania Fil: Godin Beekmann, S.. Centre National de la Recherche Scientifique; Francia Fil: Hansen, G. H.. Norwegian Air Research Institute; Noruega Fil: Leblanc, T.. National Aeronautics and Space Administration; Estados Unidos Fil: McDermid, I. S.. National Aeronautics and Space Administration; Estados Unidos Fil: Meijer, Y. J.. European Space Agency; Italia Fil: Nakane, H.. National Institute for Environmental Studies; Japón Fil: Quel, Eduardo Jaime. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación en Láseres y Aplicaciones; Argentina Fil: Steinbrecht, W.. European Space Agency; Italia Fil: Strawbridge, K.B.. Centre for Atmospheric Research Experiments; Canadá Fil: Tatarov, B.. National Institute for Environmental Studies; Japón Fil: Wolfram, Elian Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación en Láseres y Aplicaciones; Argentina

Published
2009
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2. Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Author

E. Dupuy, K. A. Walker, J. Kar, C. D. Boone, C. T. McElroy, P. F. Bernath, J. R. Drummond, R. Skelton, S. D. McLeod, R. C. Hughes, C. R. Nowlan, D. G. Dufour, J. Zou, F. Nichitiu, K. Strong, P. Baron, R. M. Bevilacqua, T. Blumenstock, G. E. Bodeker, T. Borsdorff, A. E. Bourassa, H. Bovensmann, I. S. Boyd, A. Bracher, C. Brogniez, J. P. Burrows, V. Catoire, S. Ceccherini, S. Chabrillat, T. Christensen, M. T. Coffey, U. Cortesi, J. Davies, C. De Clercq, D. A. Degenstein, M. De Mazière, P. Demoulin, J. Dodion, B. Firanski, H. Fischer, G. Forbes, L. Froidevaux, D. Fussen, P. Gerard, S. Godin-Beekman, F. Goutail, J. Granville, D. Griffith, C. S. Haley, J. W. Hannigan, M. Höpfner, J. J. Jin, A. Jones, N. B. Jones, K. Jucks, A. Kagawa, Y. Kasai, T. E. Kerzenmacher, A. Kleinböhl, A. R. Klekociuk, I. Kramer, H. Küllmann, J. Kuttippurath, E. Kyrölä, J.-C. Lambert, N. J. Livesey, E. J. Llewellyn, N. D. Lloyd, E. Mahieu, G. L. Manney, B. T. Marshall, J. C. McConnell, M. P. McCormick, I. S. McDermid, M. McHugh, C. A. McLinden, J. Mellqvist, K. Mizutani, Y. Murayama, D. P. Murtagh, H. Oelhaf, A. Parrish, S. V. Petelina, C. Piccolo, J.-P. Pommereau, C. E. Randall, C. Robert, C. Roth, M. Schneider, C. Senten, T. Steck, A. Strandberg, K. B. Strawbridge, R. Sussmann, D. P. J. Swart, D. W. Tarasick, J. R. Taylor, C. Tétard, L. W. Thomason, A. M. Thompson, M. B. Tully, J. Urban, F. Vanhellemont, T. von Clarmann, P. von der Gathen, C. von Savigny, J. W. Waters, J. C. Witte, M. Wolff, J. M. Zawodny, Department of Chemistry [Waterloo], University of Waterloo [Waterloo], Department of Physics [Toronto], University of Toronto, Environment and Climate Change Canada, Department of Chemistry [York, UK], University of York [York, UK], Department of Physics and Atmospheric Science [Halifax], Dalhousie University [Halifax], Picomole Instruments Inc., National Institute of Information and Communications Technology [Tokyo, Japan] (NICT), Naval Research Laboratory (NRL), Institute for Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology (KIT), National Institute of Water and Atmospheric Research [Wellington] (NIWA), Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU), Karlsruher Institut für Technologie (KIT), Institute of Space and Atmospheric Studies [Saskatoon] (ISAS), Department of Physics and Engineering Physics [Saskatoon], University of Saskatchewan [Saskatoon] (U of S)-University of Saskatchewan [Saskatoon] (U of S), Institut für Umweltphysik [Bremen] (IUP), Universität Bremen, Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique et chimie de l'environnement (LPCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Istituto di Fisica Applicata 'Nello Carrara' (IFAC), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Danish Climate Centre, Danish Meteorological Institute (DMI), Earth and Sun Systems Laboratory (ESSL), National Center for Atmospheric Research [Boulder] (NCAR), Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, Environment Canada Sable Island, Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), School of Chemistry [Wollongong], University of Wollongong [Australia], Centre for Research in Earth and Space Science [Toronto] (CRESS), York University [Toronto], Department of Earth and Space Science and Engineering [York University - Toronto] (ESSE), Department of Radio and Space Science [Göteborg], Chalmers University of Technology [Göteborg], Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University-Smithsonian Institution, Fujitsu FIP Corporation, Ice, Ocean, Atmosphere and Climate Program [Kingston] (IOAC), Australian Antarctic Division (AAD), Australian Government, Department of the Environment and Energy-Australian Government, Department of the Environment and Energy, Finnish Meteorological Institute (FMI), New Mexico Institute of Mining and Technology [New Mexico Tech] (NMT), GATS Inc., Atmospheric Sciences Division [Hampton], NASA Langley Research Center [Hampton] (LaRC), Department of Astronomy [Amherst], University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS)-University of Massachusetts System (UMASS), Department of Physics [Victoria], La Trobe University [Melbourne], Department of Atmospheric, Oceanic and Planetary Physics [Oxford] (AOPP), University of Oxford, Laboratory for Atmospheric and Space Physics [Boulder] (LASP), University of Colorado [Boulder], National Institute for Public Health and the Environment [Bilthoven] (RIVM), PennState Meteorology Department, Pennsylvania State University (Penn State), Penn State System-Penn State System, Australian Bureau of Meteorology [Melbourne] (BoM), Australian Government, Alfred Wegener Institute [Potsdam], Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Science Systems and Applications, Inc. [Lanham] (SSAI), NASA Goddard Space Flight Center (GSFC), Université d'Orléans (UO)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Consiglio Nazionale delle Ricerche [Roma] (CNR), Harvard University [Cambridge]-Smithsonian Institution, University of Oxford [Oxford], National Institute of Information and Communications Technology ( NICT ), Naval Research Laboratory ( NRL ), Institut für Meteorologie und Klimaforschung ( IMK ), Karlsruher Institut für Technologie ( KIT ), National Institute of Water and Atmospheric Research [Wellington] ( NIWA ), Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung ( IMK-IFU ), Institute of Space and Atmospheric Studies [Saskatoon] ( ISAS ), University of Saskatchewan [Saskatoon] ( U of S ), Institut für Umweltphysik [Bremen] ( IUP ), Laboratoire d’Optique Atmosphérique - UMR 8518 ( LOA ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université de Lille-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de physique et chimie de l'environnement ( LPCE ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université d'Orléans ( UO ) -Centre National de la Recherche Scientifique ( CNRS ), Istituto di Fisica Applicata 'Nello Carrara' ( IFAC ), Consiglio Nazionale delle Ricerche [Roma] ( CNR ), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique ( BIRA-IASB ), Danish Meteorological Institute ( DMI ), Earth and Sun Systems Laboratory ( ESSL ), National Center for Atmospheric Research [Boulder] ( NCAR ), Jet Propulsion Laboratory ( JPL ), NASA-California Institute of Technology ( CALTECH ), Service d'aéronomie ( SA ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), University of Wollongong, Centre for Research in Earth and Space Science [Toronto] ( CRESS ), Department of Earth and Space Science and Engineering [Toronto] ( ESSE ), Harvard-Smithsonian Center for Astrophysics ( CfA ), Ice, Ocean, Atmosphere and Climate Program [Kingston] ( IOAC ), Australian Antarctic Division ( AAD ), Finnish Meteorological Institute ( FMI ), New Mexico Institute of Mining and Technology [New Mexico Tech] ( NMT ), NASA Langley Research Center [Hampton] ( LaRC ), University of Massachusetts [Amherst] ( UMass Amherst ), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] ( AOPP ), Laboratory for Atmospheric and Space Physics [Boulder] ( LASP ), University of Colorado Boulder [Boulder], National Institute for Public Health and the Environment [Bilthoven] ( RIVM ), Department of Meteorology [PennState], PennState University [Pennsylvania] ( PSU ), Atmosphere Watch Section, Bureau of Meteorology, Department of Bentho-pelagic processes, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research ( AWI ), Science Systems and Applications, Inc. [Lanham] ( SSAI ), and NASA Goddard Space Flight Center ( GSFC )

Subjects
010309 optics, [ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], 010504 meteorology & atmospheric sciences, [ PHYS.PHYS.PHYS-AO-PH ] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], 13. Climate action, 0103 physical sciences, 01 natural sciences, 0105 earth and related environmental sciences
Abstract

This paper presents extensive validation analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: the ACE Fourier Transform Spectrometer (ACE-FTS) and the Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. The ACE satellite instruments operate in the mid-infrared and ultraviolet-visible-near-infrared spectral regions using the solar occultation technique. In order to continue the long-standing record of solar occultation measurements from space, a detailed quality assessment is required to evaluate the ACE data and validate their use for scientific purposes. Here we compare the latest ozone data products from ACE-FTS and ACE-MAESTRO with coincident observations from satellite-borne, airborne, balloon-borne and ground-based instruments, by analysing volume mixing ratio profiles and partial column densities. The ACE-FTS version 2.2 Ozone Update product reports more ozone than most correlative measurements from the upper troposphere to the lower mesosphere. At altitude levels from 16 to 44 km, the mean differences range generally between 0 and +10% with a slight but systematic positive bias (typically +5%). At higher altitudes (45–60 km), the ACE-FTS ozone amounts are significantly larger than those of the comparison instruments by up to ~40% (typically +20%). For the ACE-MAESTRO version 1.2 ozone data product, agreement within ±10% (generally better than ±5%) is found between 18 and 40 km for the sunrise and sunset measurements. At higher altitudes (45–55 km), systematic biases of opposite sign are found between the ACE-MAESTRO sunrise and sunset observations. While ozone amounts derived from the ACE-MAESTRO sunrise occultation data are often smaller than the coincident observations (by as much as −10%), the sunset occultation profiles for ACE-MAESTRO show results that are qualitatively similar to ACE-FTS and indicate a large positive bias (+10 to +30%) in this altitude range. In contrast, there is no significant difference in bias found for the ACE-FTS sunrise and sunset measurements. These systematic effects in the ozone profiles retrieved from the measurements of ACE-FTS and ACE-MAESTRO are being investigated. This work shows that the ACE instruments provide reliable, high quality measurements from the tropopause to the upper stratosphere and can be used with confidence in this vertical domain.

Published
2008
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3. A trajectory-based estimate of the tropospheric ozone column using the residual method

Author

Hennie Kelder, S. Chandra, Pieternel F. Levelt, Holger Vömel, E. Joseph, Esko Kyrö, S. J. Oltmans, Valery Dorokhov, Anne M. Thompson, Lucien Froidevaux, David J. Moore, Signe B. Andersen, John T. Merrill, Gérard Ancellet, René Stübi, Susan E. Strahan, P. Viatte, Jonathan Davies, Georg Hansen, Masatomo Fujiwara, B. Bojkov, Nathaniel J. Livesey, P. von der Gathen, Gert J. R. Coetzee, H. De Backer, G. Koenig-Langlo, Bryan N. Duncan, P. Skrivankova, Hans Claude, David W. Tarasick, Pawan K. Bhartia, Greg Bodeker, Gary A. Morris, Sophie Godin-Beekmann, Margarita Yela, Jacquelyn C. Witte, H. Dier, Beverly J. Johnson, Marc Allaart, M. C. Parrondos, Bertrand Calpini, Emilio Cuevas, G. Zablocki, Susan S. Kulawik, Françoise Posny, Mark R. Schoeberl, Michael J. Newchurch, F. J. Schmidlin, Alberto Redondas, C. P. Leong, Jerald R. Ziemke, Valérie Thouret, NASA Goddard Space Flight Center (GSFC), Goddard Earth Sciences and Technology Center (GEST), University of Maryland [Baltimore County] (UMBC), University of Maryland System-University of Maryland System, Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Royal Netherlands Meteorological Institute (KNMI), Science Systems and Applications, Inc. [Lanham] (SSAI), PennState Meteorology Department, Pennsylvania State University (Penn State), Penn State System-Penn State System, Izaña Atmospheric Research Center (IARC), Agencia Estatal de Meteorología (AEMet), Environment Canada (Downsview), National Institute of Water and Atmospheric Research [Lauder] (NIWA), Norwegian Institute for Air Research (NILU), NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado [Boulder]-National Oceanic and Atmospheric Administration (NOAA), Department of Atmospheric Science [Huntsville], University of Alabama in Huntsville (UAH), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Meteorologisches Observatorium Hohenpeißenberg (MOHp), Deutscher Wetterdienst [Offenbach] (DWD), Danish Meteorological Institute (DMI), Arctic Research Centre of Finnish Meteorological Institute, Finnish Meteorological Institute (FMI), Laboratorio de Atmosfera [Madrid], Spanish Space Agency, Centre of Aerology [Poland], Institute of Meteorology and Water Management - National Research Institute (IMGW - PIB), United Kingdom Met Office [Exeter], Lindenberg Meteorological Observatory - Richard Assmann Observatory (MOL-RAO), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Payerne Aerological Station, Federal Office of Meteorology and Climatology MeteoSwiss, Czech Hydrometeorological Institute (CHMI), Central Aerological Observatory (CAO), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), Institut Royal Météorologique de Belgique [Bruxelles] - Royal Meteorological Institute (IRM), Department of Environmental Affairs and Tourism, Marine and Coastal Management, South African Government, Graduate School of Environmental Science [Sapporo], Hokkaido University [Sapporo, Japan], Laboratoire d'aérologie (LAERO), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique de l'atmosphère (LPA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Department of Physics and Astronomy [Valparaiso], Valparaiso University, Graduate School of Oceanography [Narragansett], University of Rhode Island (URI), Malaysian Meteorological Department (MetMalaysia), Ministry of Science, Technology and Innovation [Malaysia] (MOSTI), Howard University, Institut Royal Météorologique de Belgique [Bruxelles] (IRM), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, and Fluids and Flows

Subjects
Atmospheric Science, Residual method, 010504 meteorology & atmospheric sciences, Microwave Limb Sounder, Soil Science, 010501 environmental sciences, Aquatic Science, Oceanography, Atmospheric sciences, 01 natural sciences, Troposphere, chemistry.chemical_compound, Geochemistry and Petrology, Earth and Planetary Sciences (miscellaneous), pollution, Tropospheric ozone, Stratosphere, 0105 earth and related environmental sciences, Earth-Surface Processes, Water Science and Technology, Ozone Monitoring Instrument, tropospheric ozone, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Ecology, Paleontology, Forestry, air quality, Geophysics, Tropospheric Emission Spectrometer, chemistry, 13. Climate action, Space and Planetary Science, Climatology, Middle latitudes, Environmental science, Tropospheric column ozone, Tropopause
Abstract

We estimate the tropospheric column ozone using a forward trajectory model to increase the horizontal resolution of the Aura Microwave Limb Sounder (MLS) derived stratospheric column ozone. Subtracting the MLS stratospheric column from Ozone Monitoring Instrument total column measurements gives the trajectory enhanced tropospheric ozone residual (TTOR). Because of different tropopause definitions, we validate the basic residual technique by computing the 200-hPa-to-surface column and comparing it to the same product from ozonesondes and Tropospheric Emission Spectrometer measurements. Comparisons show good agreement in the tropics and reasonable agreement at middle latitudes, but there is a persistent low bias in the TTOR that may be due to a slight high bias in MLS stratospheric column. With the improved stratospheric column resolution, we note a strong correlation of extratropical tropospheric ozone column anomalies with probable troposphere-stratosphere exchange events or folds. The folds can be identified by their colocation with strong horizontal tropopause gradients. TTOR anomalies due to folds may be mistaken for pollution events since folds often occur in the Atlantic and Pacific pollution corridors. We also compare the 200-hPa-to-surface column with Global Modeling Initiative chemical model estimates of the same quantity. While the tropical comparisons are good, we note that chemical model variations in 200-hPa-to-surface column at middle latitudes are much smaller than seen in the TTOR.

Published
2007
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4. Three-dimensional model study of the Arctic ozone loss in 2002/2003 and comparison with 1999/2000 and 2003/2004

Author

B. Sen, Geoffrey C. Toon, Erik Richard, S. Davies, J. F. Blavier, H. Jost, C. M. Volk, Chris Webster, A. Ulanovsky, Martyn P. Chipperfield, P. von der Gathen, Hans Claude, Fabrizio Ravegnani, Wuhu Feng, EGU, Publication, Institute for Climate and Atmospheric Science [Leeds] (ICAS), School of Earth and Environment [Leeds] (SEE), University of Leeds-University of Leeds, Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Goethe-Universität Frankfurt am Main, Central Aerological Observatory (CAO), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), CNR Institute of Atmospheric Sciences and Climate (ISAC), Consiglio Nazionale delle Ricerche (CNR), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), NASA Ames Research Center (ARC), NOAA Aeronomy Laboratory, National Oceanic and Atmospheric Administration (NOAA), and Deutscher Wetterdienst [Offenbach] (DWD)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Atmospheric Science, Ozone, Chemical transport model, Chemistry, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, Radiation, Atmospheric sciences, lcsh:QC1-999, Vortex, Troposphere, lcsh:Chemistry, chemistry.chemical_compound, lcsh:QD1-999, TRACER, Climatology, ddc:550, Polar, Stratosphere, lcsh:Physics
Abstract

We have used the SLIMCAT 3-D off-line chemical transport model (CTM) to quantify the Arctic chemical ozone loss in the year 2002/2003 and compare it with similar calculations for the winters 1999/2000 and 2003/2004. Recent changes to the CTM have improved the model's ability to reproduce polar chemical and dynamical processes. The updated CTM uses σ-θ as a vertical coordinate which allows it to extend down to the surface. The CTM has a detailed stratospheric chemistry scheme and now includes a simple NAT-based denitrification scheme in the stratosphere. In the model runs presented here the model was forced by ECMWF ERA40 and operational analyses. The model used 24 levels extending from the surface to ~55km and a horizontal resolution of either 7.5° x 7.5° or 2.8° x 2.8°. Two different radiation schemes, MIDRAD and the CCM scheme, were used to diagnose the vertical motion in the stratosphere. Based on tracer observations from balloons and aircraft, the more sophisticated CCM scheme gives a better representation of the vertical transport in this model which includes the troposphere. The higher resolution model generally produces larger chemical O3 depletion, which agrees better with observations. The CTM results show that very early chemical ozone loss occurred in December 2002 due to extremely low temperatures and early chlorine activation in the lower stratosphere. Thus, chemical loss in this winter started earlier than in the other two winters studied here. In 2002/2003 the local polar ozone loss in the lower stratosphere was ~40% before the stratospheric final warming. Larger ozone loss occurred in the cold year 1999/2000 which had a persistently cold and stable vortex during most of the winter. For this winter the current model, at a resolution of 2.8° x 2.8°, can reproduce the observed loss of over 70% locally. In the warm and more disturbed winter 2003/2004 the chemical O3 loss was generally much smaller, except above 620K where large losses occurred due to a period of very low minimum temperatures at these altitudes.

Published
2005

5. Statistical analysis of the precision of the Match method

Author

Ralph Lehmann, Markus Rex, M. Streibel, P. von der Gathen, EGU, Publication, and Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Atmospheric Science, 010504 meteorology & atmospheric sciences, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, Magnitude (mathematics), Radius, 010501 environmental sciences, 01 natural sciences, lcsh:QC1-999, Displacement (vector), lcsh:Chemistry, Standard error, lcsh:QD1-999, 13. Climate action, Position (vector), Statistics, Trajectory, Satellite, Stratosphere, lcsh:Physics, 0105 earth and related environmental sciences, Mathematics
Abstract

International audience; The Match method quantifies chemical ozone loss in the polar stratosphere. The basic idea consists in calculating the forward trajectory of an air parcel that has been probed by an ozone measurement (e.g., by an ozonesonde or satellite instrument) and finding a second ozone measurement close to this trajectory. Such an event is called a "match". A rate of chemical ozone destruction can be obtained by a statistical analysis of several tens of such match events. Information on the uncertainty of the calculated rate can be inferred from the scatter of the ozone mixing ratio difference (second measurement minus first measurement) associated with individual matches. A standard analysis would assume that the errors of these differences are statistically independent. However, this assumption may be violated because different matches can share a common ozone measurement, so that the errors associated with these match events become statistically dependent. Taking this effect into account, we present an analysis of the uncertainty of the final Match result. It has been applied to Match data from the Arctic winters 1995, 1996, 2000, and 2003. For these ozonesonde Match studies the effect of the error correlation on the uncertainty estimates is rather small: compared to a standard error analysis, the uncertainty estimates increase by 15% on average. However, the effect may be more pronounced for typical satellite Match analyses: for an Antarctic satellite Match study (2003), the uncertainty estimates increase by 60% on average. The analysis showed that the random errors of the ozone measurements and the "net match errors", which result from a displacement of the second ozone measurement of a match from the required position, are of similar magnitude. This demonstrates that the criteria for accepting a match (maximum trajectory duration, match radius, spread of trajectory clusters etc.) ensure that, given the unavoidable ozone-measurement errors, the magnitude of the net match errors is adequate. The estimate of the random errors of the ozonesonde measurements agrees well with laboratory results.

Published
2005

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