Physical Sciences and Mathematics Commons^™

Effects Of Atmospheric Light Scattering On Spectroscopic Observations Of Greenhouse Gases From Space: Validation Of Ppdf-Based Co 2 Retrievals From Gosat, Sergey Oshchepkov, Andrey Bril, Tatsuya Yokota, Isamu Morino, Yukio Yoshida, Tsuneo Matsunaga, Dmitry Belikov, Debra Wunch, Paul Wennberg, Geoffrey Toon, Christopher O'Dell, André Butz, Sandrine Guerlet, Austin Cogan, Hartmut Boesch, Nawo Eguchi, Nicholas Deutscher, David Griffith, Ronald Macatangay, Justus Notholt, Ralf Sussmann, Markus Rettinger, Vanessa Sherlock, John Robinson, Esko Kyro, Pauli Heikkinen, Dietrich G. Feist, Tomoo Nagahama, Nikolay Kadygrov, Shamil Maksyutov, Osamu Uchino, Hiroshi Watanabe

Faculty of Science - Papers (Archive)

This report describes a validation study of Greenhouse gases Observing Satellite (GOSAT) data processing using ground-based measurements of the Total Carbon Column Observing Network (TCCON) as reference data for column-averaged dry air mole fractions of atmospheric carbon dioxide (X CO2). We applied the photon path length probability density function method to validate X CO2 retrievals from GOSAT data obtained during 22months starting from June 2009. This method permitted direct evaluation of optical path modifications due to atmospheric light scattering that would have a negligible impact on ground-based TCCON measurements but could significantly affect gas retrievals when observing reflected sunlight from …

Validation Of Iasi Forli Carbon Monoxide Retrievals Using Ftir Data From Ndacc, T Kerzenmacher, B Dils, N Kumps, T Blumenstock, C Clerbaux, P F. Coheur, P Demoulin, Omaira Garcia, M George, David W. Griffith, F Hase, J Hadji-Lazaro, D Hurtmans, Nicholas B. Jones, E Mahieu, Justus Notholt, Clare Paton-Walsh, U Raffalski, T Ridder, M Schneider, C Servais, M De Maziere

Faculty of Science - Papers (Archive)

Carbon monoxide (CO) is retrieved daily and globally from space-borne IASI radiance spectra using the Fast Optimal Retrievals on Layers for IASI (FORLI) software developed at the Universit´e Libre de Bruxelles (ULB). The IASI CO total column product for 2008 from the most recent FORLI retrieval version (20100815) is evaluated using correlative CO profile products retrieved from groundbased solar absorption Fourier transform infrared (FTIR) observations at the following FTIR spectrometer sites from the Network for the Detection of Atmospheric Composition Change (NDACC): Ny-A° lesund, Kiruna, Bremen, Jungfraujoch, Iza˜na and Wollongong. In order to have good statistics for the comparisons, we …

Preliminary Validation Of Column-Averaged Volume Mixing Ratios Of Carbon Dioxide And Methane Retrieved From Gosat Short-Wavelength Infrared Spectra, David W. Griffith, G C. Toon, B Connor, R Sussmann, Thorsten Warneke, Nicholas M. Deutscher, Paul O. Wennberg, Justus Notholt, V Sherlock, J Robinson, O Uchino, C M. Roehl, I Morino, Debra Wunch, Janina Messerschmidt, Y Yoshida, M Inoue, M Rettinger

Faculty of Science - Papers (Archive)

Column-averaged volume mixing ratios of carbon dioxide and methane retrieved from the Greenhouse gases Observing SATellite (GOSAT) Short-Wavelength InfraRed observation (GOSAT SWIR XCO2 and XCH4 ) were compared with the reference calibrated data obtained by ground-based high-resolution Fourier Transform Spectrometers (g-b FTSs) participating in the Total Carbon Column Observing Network (TCCON). Preliminary results are as follows: the GOSAT SWIR XCO2 and XCH4 (Version 01.xx) are biased low by 8.85 ±4.75 ppm (2.3±1.2 %) and 20.4±18.9 ppb (1.2±1.1 %), respectively. The standard deviation of the GOSAT SWIR XCO2 and XCH4 is about 1% after correcting the negative biases of XCO2 and …

Retrieval Of Atmospheric Co2 With Enhanced Accuracy And Precision From Sciamachy: Validation With Fts Measurements And Comparison With Model Results, M Reuter, H Bovensmann, M Buchwitz, Jp Burrows, B Connor, Nicholas M. Deutscher, David W. Griffith, J Heymann, Gretchen Keppel-Aleks, Janina Messerschmidt, Justus Notholt, Christof Petri, J Robinson, O Schneising, V Sherlock, Voltaire A. Velazco, Thorsten Warneke, Paul O. Wennberg, Debra Wunch

Faculty of Science - Papers (Archive)

The Bremen Optimal Estimation differential optical absorption spectroscopy (DOAS) (BESD) algorithm for satellite based retrievals of XCO 2 (the column-average dry-air mole fraction of atmospheric CO 2) has been applied to Scanning Imaging Absorption Spectrometer for Atmospheric Cartography (SCIAMACHY) data. It uses measurements in the O 2-A absorption band to correct for scattering of undetected clouds and aerosols. Comparisons with precise and accurate ground-based Fourier transform spectrometer (FTS) measurements at four Total Carbon Column Observing Network (TCCON) sites have been used to quantify the quality of the new SCIAMACHY XCO 2 data set. Additionally, the results have been compared to …

Preliminary Validation Of Column-Averaged Volume Mixing Ratios Of Carbon Dioxide And Methane Retrieved From Gosat Short-Wavelength Infrared Spectra, I Morino, O Uchino, M Inoue, Y Yoshida, T Yokota, P Wennberg, G C Toon, Debra Wunch, C M. Roehl, J Notholt, T Warneke, Janina Messerschmidt, David W. Griffith, Nicholas M. Deutscher, V Sherlock, B Connor, J Robinson, R Sussmann, M Rettinger

Faculty of Science - Papers (Archive)

Column-averaged volume mixing ratios of carbon dioxide and methane retrieved from the Greenhouse gases Observing SATellite (GOSAT) Short-Wavelength InfraRed observation (GOSAT SWIR XCO2 and XCH4) were compared with the reference data ob- 5 tained by ground-based high-resolution Fourier Transform Spectrometers (g-b FTSs) participating in the Total Carbon Column Observing Network (TCCON). Through calibrations of g-b FTSs with airborne in-situ measurements, the uncertainty of XCO2 and XCH4 associated with the g-b FTS was determined to be 0.8 ppm (0.2%) and 4 ppb (0.2%), respectively. The GOSAT products are validated with 10 these calibrated g-b FTS data. Preliminary results are as follows: …

Validation Of Five Years (2003-2007) Of Sciamachy Co Total Column Measurements Using Ground-Based Spectrometer Observations, A T. J De Laat, A M. S Gloudemans, H Schrijver, I Aben, Y Nagahama, K Suzuki, E Mahieu, N B. Jones, Clare Paton-Walsh, N M. Deutscher, D W. T Griffith, M De Maziere, R L. Mittermeier, H Fast, J Notholt, M Palm, T Hawat, T Blumenstock, F Hase, M Schneider, C Rinsland, A V. Dzhola, E I. Grechko, A M. Poberovskii, M V. Makarova, J Mellqvist, A Strandberg, R Sussmann, T Borsdorff, M Rettinger

Faculty of Science - Papers (Archive)

Abstract. This paper presents a validation study of SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) carbon monoxide (CO) total column measurements from the Iterative Maximum Likelihood Method (IMLM) algorithm using ground-based spectrometer observations from twenty surface stations for the five year time period of 2003–2007. Overall we find a good agreement between SCIAMACHY and ground-based observations for both mean values as well as seasonal variations. For high-latitude Northern Hemisphere stations absolute differences between SCIAMACHY and ground-based measurements are close to or fall within the SCIAMACHY CO 2 precision of 0.2×1018 molecules/cm2 (10%) indicating that SCIAMACHY can observe CO accurately …

Validation Of Ozone Measurements From The Atmospheric Chemistry Experiment (Ace), Nicholas B. Jones, David W. Griffith, M Wolff, E Mahieu, G Bodeker, I Boyd, M De Maziere, P Demoulin, T Blumenstock, Y. Murayama, A. Kagawa, J Jin, Christopher Mcelroy, J Hannigan, M Coffey, M Hopfner, H W. Fischer, T Kerzenmacher, I Kramer, J Mellqvist, R Sussmann, K Strong, J R. Taylor, K Mizutani, Y Kasai, J Urban, D Murtagh, E Dupuy, V Catoire, S Chabrillat, P Baron, C Brogniez, G L. Manney, C Piccolo, C Randall, C Robert, C Senten, C Tetard, N J. Livesey, A Kleinbohl, S Godin-Beekmann, T Borsdorff, James Drummond, C De Clercq, J C. Lambert, U Cortesi, K W. Jucks, C Boone, H Oelhaf, M Schneider, T Steck, K A. Walker, P Bernath, T Von Clarmann, R Hughes, C Vigouroux, J Kuttippurath, A Bracher, J Mcconnell, C Mclinden, H Kullmann, L Froidevaux, J Dodion, F Vanhellemont, J P. Burrows, J Kar, F Goutail, D G. Dufour, J M. Zawodny, F Nichitiu, J-P Pommereau, C Nowlan, D Fussen, J Zou, A R Klekociuk, G Forbes, H Bovensmann, R M Bevilacqua, C Haley, S Ceccherini, S D Mcleod, P Gerard, R Skelton, B Firanski, A E Bourassa, D A Degenstein, J Davies, T Christensen, J Granville, A Parrish, C Roth, J W. Waters, C Von Savigny, A Standberg, M Mchugh, A M. Thompson, E J Llewellyn, P Von Der Gathen, M B. Tully, J C. Witte, C Roth, B T. Marshall, K B. Strawbridge, E Kyrola, M P. Mccormick, D P J Swart, N D Lloyd, D W. Tarasick, S V. Petelina, L W. Thomason, A Jones, I S. Mcdermid

Faculty of Science - Papers (Archive)

This paper presents extensive bias determination 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. Here we compare the latest ozone data products from ACE-FTS and ACE-MAESTRO with coincident observations from nearly 20 satellite-borne, airborne, balloonborne and ground-based instruments, by analysing volume mixing ratio profiles and partial column densities. The ACEFTS 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 …

Validation Of Version-4.61 Methane And Nitrous Oxide Observed By Mipas, S Payan, C Camy-Peyret, H Oelhaf, G Wetzel, G Maucher, C Keim, M Pirre, N Huret, A Engel, M C. Volk, H Kuellmann, J Kuttippurath, U Cortesi, G Bianchini, F Mencaraglia, P Raspollini, G Redaelli, C Vigouroux, M De Maziere, S Mikuteit, T Blumenstock, Voltaire A. Velazco, J Notholt, E Mahieu, P Duchatelet, D Smale, S Wood, N Jones, C Piccolo, V Payne, A Bracher, N Glatthor, G P. Stiller, K Grunow, P Jeseck, Y Te, A Butz

Faculty of Science - Papers (Archive)

The ENVISAT validation programme for the atmospheric instruments MIPAS, SCIAMACHY and GOMOS is based on a number of balloon-borne, aircraft, satellite and ground-based correlative measurements. In particular the activities of validation scientists were coordinated by ESA within the ENVISAT Stratospheric Aircraft and Balloon Campaign or ESABC.

Validation Of Hno3, C1ono2, And N2o5 From The Atmospheric Chemistry Experiment Fourier Transform Spectrometer (Ace-Fts), M A. Wolff, T Kerzenmacher, K Strong, K A. Walker, M Toohey, E Dupuy, P F. Bernath, C Boone, S Brohede, V Catoire, T Von Clarmann, M Coffey, W Daffer, M De Maziere, P Duchatelet, N Glatthor, David W. Griffith, J Hannigan, F Hase, M Hopfner, N Huret, Nicholas B. Jones, K W. Jucks, A. Kagawa, Y Kasai, I Kramer, H Kullmann, J Kuttippurath, E Mahieu, G L. Manney, Christopher Mcelroy, C Mclinden, Y Mebarki, S Mikuteit, D Murtagh, C Piccolo, P Raspollini, M Ridolfi, R Ruhnke, M Santee, C Senten, D Smale, C Tetard, J Urban, S Wood

Faculty of Science - Papers (Archive)

The Atmospheric Chemistry Experiment (ACE) satellite was launched on 12 August 2003. Its two instruments measure vertical profiles of over 30 atmospheric trace gases by analyzing solar occultation spectra in the ultraviolet/visible and infrared wavelength regions. The reservoir gases HNO₃, ClONO₂, and N₂O₅ are three of the key species provided by the primary instrument, the ACE Fourier Transform Spectrometer (ACE-FTS). This paper describes the ACE-FTS version 2.2 data products, including the N₂O₅ update, for the three species and presents validation comparisons with available observations. We have compared volume mixing ratio …

Global Airs And Mopitt Co Measurements: Validation, Comparison, And Links To Biomass Burning Variations And Carbon Cycle, Leonid N. Yurganov, W. Wallace Mcmillan, Anatoly V. Dzhola, Evgeny I. Grechko, Nicholas B. Jones, Guido R. Van Der Werf

Faculty of Science - Papers (Archive)

New results of CO global total column measurements using the Atmospheric Infrared Sounder (AIRS) aboard the Aqua satellite in comparison with Measurements of Pollution in the Troposphere (MOPITT) sensor aboard the Terra satellite are presented. Both data sets are validated using ground-based total column measurements in Russia and Australia. A quality parameter based on the Profile Percent A Priori values from the standard MOPITT product is introduced. AIRS data (version 4) for biomass burning events are in agreement or lower than both MOPITT and ground measurements, but CO bursts can be seen by AIRS in most cases. For the cases …

Validation Of No2 And No From The Atmospheric Chemistry Experiment (Ace), Nicholas B. Jones, David W. Griffith, M Wolff, L Llewellyn, T Blumenstock, Christopher Mcelroy, M Hopfner, T Kerzenmacher, I Kramer, K Strong, Cassandra Haley, J R. Taylor, Thorsten Warneke, D Murtagh, E Dupuy, V Catoire, N Huret, C Brogniez, G L. Manney, C Piccolo, C Randall, C Tetard, M Lopez-Puertas, James Drummond, C Boone, B Funke, M Schneider, S Mikuteit, G P. Stiller, K A. Walker, P Bernath, O Schrems, P Raspollini, C Mclinden, S Brohede, M Toohey, M Ridolfi, J Dodion, F Vanhellemont, R L. Batchelor, J P. Burrows, J Kar, L K. Amekudzi, S Melo, F Goutail, C Bramstedt, D G. Dufour, M Silicani, J M. Zawodny, A Richter, G Berthet, F Nichitiu, J-P Pommereau, C Nowlan, D Fussen, J Zou, Irwin S. Pakula, Justus Notholt

Faculty of Science - Papers (Archive)

Vertical profiles of NO2 and NO have been obtained from solar occultation measurements by the Atmospheric Chemistry Experiment (ACE), using an infrared Fourier Transform Spectrometer (ACE-FTS) and (for NO2) an ultraviolet-visible-near-infrared spectrometer, MAESTRO (Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation). In this paper, the quality of the ACE-FTS version 2.2 NO2 and NO and the MAESTRO version 1.2 NO2 data are assessed using other solar occultation measurements

(HALOE, SAGE II, SAGEIII, POAMIII, SCIAMACHY), stellar occultation measurements (GOMOS), limb measurements (MIPAS, OSIRIS), nadir measurements (SCIAMACHY), balloon-borne measurements (SPIRALE, SAOZ) and ground-based measurements (UV-VIS, FTIR). Time differences …

Validation Of Ace-Fts N2o Measurements, K Strong, M Wolff, T Kerzenmacher, K A. Walker, Nicholas B. Jones, David W. Griffith, E Mahieu, S Wood, M De Maziere, P Demoulin, T Blumenstock, J Jin, J Hannigan, M Coffey, M Hopfner, P Duchatelet, J Mellqvist, A Strandberg, J R. Taylor, Thorsten Warneke, J Urban, D Murtagh, E Dupuy, V Catoire, C Piccolo, C Robert, C Senten, C Tetard, K W. Jucks, C Boone, N Glatthor, M Schneider, S Mikuteit, G P. Stiller, P Bernath, O Schrems, H Kuellmann, P Raspollini, A Lambert, J Mcconnell, J Kittippurath, K Semeniuk, M Toohey, M Ridolfi, Justus Notholt

Faculty of Science - Papers (Archive)

The Atmospheric Chemistry Experiment (ACE), also known as SCISAT, was launched on 12 August 2003,carrying two instruments that measure vertical profiles of atmospheric constituents using the solar occultation technique.One of these instruments, the ACE Fourier Transform Spectrometer (ACE-FTS), is measuring volume mixing ratio profiles of nitrous oxide (N2O) from the upper troposphere to the lower mesosphere. In this study, the quality of the ACE-FTS version 2.2 N2O data is assessed rough comparisons with coincident measurements made by other satellite, balloon-borne, aircraft, and ground-based instruments.These consist of vertical profile comparisons with the SMR, MLS, and MIPAS satellite instruments, multiple aircraft flights …

Validation Of Ace-Fts V2.2 Methane Profiles From The Upper Troposphere To Lower Mesosphere, M De Maziere, C Vigouroux, P F. Bernath, P Baron, T Blumenstock, C Boone, C Brogniez, V Catoire, M Coffey, P Duchatelet, David W. Griffith, J Hannigan, Y Kasai, I Kramer, Nicholas B. Jones, E Mahieu, G L. Manney, C Piccolo, C Randall, C Robert, C Senten, K Strong, J R. Taylor, C Tetard, K A. Walker, S Wood

Faculty of Science - Papers (Archive)

The ACE-FTS (Atmospheric Chemistry Experiment 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 CH4 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 lower stratosphere, and within 25% in the …

Validation Of Ace-Fts V2.2 Measurements Of Hci, Hf, Cci3f And Cci2f2 Using Space-, Balloons- And Ground-Based Instrument Observations, E Mahieu, P Duchatelet, P Demoulin, L Froidevaux, C Randall, Nicholas B. Jones, David W. Griffith, G C. Toon, J-F Blavier, C P Rinsland, R Zander, S Wood, M De Maziere, T Blumenstock, A. Kagawa, J Hannigan, M Coffey, F Hase, D Smale, K Strong, J R. Taylor, Thorsten Warneke, Y Kasai, E Dupuy, V Catoire, C Robert, C Senten, C Tetard, K W. Jucks, C Boone, S Mikuteit, K A. Walker, P Bernath, O Schrems, Y Mebarki, R Nassar, C Servais, Justus Notholt

Faculty of Science - Papers (Archive)

Hydrogen chloride (HCl) and hydrogen fluoride (HF) are respectively the main chlorine and fluorine reservoirs in the Earth's stratosphere. Their buildup resulted from the intensive use of man-made halogenated source gases, in particular CFC-11 (CCl₃F) and CFC-12 (CCl₂F₂), during the second half of the 20th century. It is important to continue monitoring the evolution of these source gases and reservoirs, in support of the Montreal Protocol and also indirectly of the Kyoto Protocol. The Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) is a space-based instrument that has been performing regular solar occultation measurements of …

Validation And Data Characteristics Of Methane And Nitrous Oxide Profiles Observed By Mipas And Processed With Version 4.61 Algorithm, S Payan, C Camy-Peyret, H Oelhaf, G Wetzel, G Maucher, Nicholas B. Jones, S Wood, M De Maziere, T Blumenstock, P Duchatelet, D Smale, G Bianchini, G Redaelli, F Mencaraglia, M Pirre, N Huret, C Piccolo, U Cortesi, C Keim, N Glatthor, S Mikuteit, G P. Stiller, C Vigouroux, A Engel, M C. Volk, J Kuttippurath, H Kuellmann, P Raspollini, M Mahieu, V Payne, A Bracher, K Grunow, P Jeseck, Y Te, K Pfeilsticker, A Butz, Justus Notholt, Voltaire A. Velazco

Faculty of Science - Papers (Archive)

The ENVISAT validation programme for the atmospheric instruments MIPAS, SCIAMACHY and GOMOS is based on a number of balloon-bone, aircraft and ground-based correlative measurements. In particular the activities of validation scientists were coordinated by ESA within the ENVISAT Stratospheric Aircraft and Balloon Campaign of ESABC. As part of a series of similar papers on other species [this issue] and in parallel to the contribution of the individual validation teams, the present paper provides a synthesis of comparisons performed between MIPAS CH4 and N2O profiles produced by the current ESA operational software (Instrument Processing Facility version 4.61 or IPF v4.61) and …

Validation Of Mipas Hno3 Operational Data, D Y. Wang, M Hopfner, C E. Blom, W E. Ward, Nicholas B. Jones, G C. Toon, E Mahieu, S Wood, M De Maziere, P Demoulin, T Blumenstock, F Hase, H W. Fischer, D Smale, G Bianchini, G Redaelli, F Mencaraglia, J Urban, D Murtagh, M Pirre, V Catoire, N Huret, H Nakajima, C Piccolo, T Sugita, A Kleinbohl, U Cortesi, C Boone, H Oelhaf, C Keim, G Y. Liu, G Wetzel, S Mikuteit, K A. Walker, P Bernath, C Vigouroux, J Kuttippurath

Faculty of Science - Papers (Archive)

Nitric acid (HNO3) is one of the key products that are operationally retrieved by the European Space Agency (ESA) from the emission spectra measured by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) onboard ENVISAT. The product version 4.61/4.62 for the observation period between July 2002 and March 2004 is validated by comparisons with a number of independent observations from ground-based stations, aircraft/balloon campaigns, and satellites. Individual HNO3 profiles of the ESA MIPAS level-2 product show good agreement with those of MIPAS-B and MIPAS-STR (the balloon and aircraft version of MIPAS, respectively), and the balloon-borne infrared spectrometers MkIV and SPIRALE, …

Geophysical Validation Of Mipas-Envisat Operational Ozone Data, U Cortesi, J C. Lambert, C De Clercq, G. Bianchini, T Blumenstock, A. Bracher, E. Castelli, V. Catoire, K. V. Chance, M. De Maziere, P. Demoulin, S. Godin-Beekmann, N. B. Jones, K. Jucks, C. Keim, T. Kerzenmacher, H. Kuellmann, J. Kuttippurath, M. Iarlori, G. Y. Liu, Y. Liu, I. S. Mcdermid, Y. J. Meijer, F. Mencaraglia, S. Mikuteit, H. Oelhaf, C. Piccolo, M. Pirre, P. Raspollini, F. Ravegnani, W. J. Reburn, G. Redaelli, J. J. Remedios, H. Sembhi, D. Smale, T. Steck, A. Taddei, C. Varotsos, C. Vigouroux, A. Waterfall, G. Wetzel, S. Wood

Faculty of Science - Papers (Archive)

The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), on-board the European ENVIronmental SATellite (ENVISAT) launched on 1 March 2002, is a middle infrared Fourier Transform spectrometer measuring the atmospheric emission spectrum in limb sounding geometry. The instrument is capable to retrieve the vertical distribution of temperature and trace gases, aiming at the study of climate and atmospheric chemistry and dynamics, and at applications to data assimilation and weather forecasting.

Validation Of Mipas Clono2 Measurements, M Hopfner, T Von Clarmann, Nicholas B. Jones, David W. Griffith, G C. Toon, E Mahieu, R Zander, S Wood, T Blumenstock, J Hannigan, M Coffey, F Hase, H W. Fischer, J Mellqvist, A Strandberg, Thorsten Warneke, C E. Blom, C Piesch, K W. Jucks, K Chance, W Kouker, T Reddmann, C Boone, H Oelhaf, C Keim, N Glatthor, M Kiefer, S Kellmann, R Ruhnke, A Linden, G Y. Liu, B Funke, M Milz, M Schneider, G Wetzel, T Steck, A Kleinert, S Mikuteit, G P. Stiller, U Grabowski, K A. Walker, P Bernath, F Friedl-Vallon, Justus Notholt

Faculty of Science - Papers (Archive)

Altitude profiles of ClONO2 retrieved with the IMK (Institut fur Meteorologie und Klimaforschung) science-oriented data processor from MIPAS/Envisat (Michelson Interferometer for Passive Atmospheric Sounding on Envisat) mid-infrared limb emission measurements between July 2002 and March 2004 have been validated by comparison with balloon-borne (Mark IV, FIRS2, MIPASB), airborne (MIPAS-STR), ground-based (Spitsbergen, Thule, Kiruna, Harestua, Jungfraujoch, Izana, Wollongong, Lauder), and spaceborne (ACE-FTS) observations. With few exceptions we found very good agreement between these instruments and MIPAS with no evidence for any bias in most cases and altitude regions. For balloon-borne measurements typical absolute mean differences are below 0.05 ppbv over the …

The Global Budget Of Co, 1988-1997: Source Estimates And Validation With A Global Model, B N. Duncan, J A. Logan, I Bey, I A. Megretskaia, R M. Yantosca, P C. Novelli, Nicholas B. Jones, C P Rinsland

Faculty of Science - Papers (Archive)

We present a model study of carbon monoxide for 1988-1997 using the GEOS-Chem 3-D model driven by assimilated meteorological data, with time-varying emissions from biomass burning and from fossil fuel and industry, overhead ozone columns, and methane. The hydroxyl radical is calculated interactively using a chemical parameterization to capture chemical feedbacks. We document the inventory for fossil fuels/industry and discuss major uncertainties and the causes of differences with other inventories that give significantly lower emissions. We find that emissions hardly change from 1988 to 1997, as increases in Asia are offset by decreases elsewhere. The model reproduces the 20% decrease …

Co Measurements From The Ace-Fts Satellite Instrument: Data Analysis And Validation Using Ground-Based, Airborne And Spaceborne Observations, C Clerbaux, M George, S Turquety, K A. Walker, Nicholas B. Jones, David W. Griffith, C P Rinsland, E Mahieu, M De Maziere, A. Kagawa, J Hannigan, M Coffey, F Hase, M Hopfner, P Duchatelet, I Kramer, A Strandberg, K Strong, Y Kasai, B Barret, P Ricaud, D Murtagh, E Dupuy, V Catoire, C Robert, C Senten, N J. Livesey, M Luo, M Lopez-Puertas, Ph Medelec, A Pazmino, H Pumphrey, T Borsdorff, P F. Coheur, J P. Cammas, James Drummond, R De Zafra, M Deeter, L Emmons, F Eddounia, J C. Gille, E Le Flochmoen, C Boone, B Funke, M Schneider, G P. Stiller, P Bernath, D P. Edwards

Faculty of Science - Papers (Archive)

The Atmospheric Chemistry Experiment (ACE) mission was launched in August 2003 to sound the atmosphere by solar occultation. Carbon monoxide (CO), a good tracer of pollution plumes and atmospheric dynamics, is one of the key species provided by the primary instrument, the ACE-Fourier Transform Spectrometer (ACE-FTS). This instrument performs measurements in both the CO 1-0 and 2-0 ro-vibrational bands, from which vertically resolved CO concentration profiles are retrieved, from the mid-troposphere to the thermosphere. This paper presents an updated description of the ACE-FTS version 2.2 CO data product, along with a comprehensive validation of these profiles using available observations (February …