Validation of XCO 2 derived from SWIR spectra of GOSAT TANSO-FTS with aircraft measurement data

Abstract. Column-averaged dry air mole fractions of carbon dioxide (XCO2) retrieved from Greenhouse gases Observing SATellite (GOSAT) Short-Wavelength InfraRed (SWIR) observations were validated with aircraft measurements by the Comprehensive Observation Network for TRace gases by AIrLiner (CONTRAIL) project, the National Oceanic and Atmospheric Administration (NOAA), the US Department of Energy (DOE), the National Institute for Environmental Studies (NIES), the HIAPER Pole-to-Pole Observations (HIPPO) program, and the GOSAT validation aircraft observation campaign over Japan. To calculate XCO2 based on aircraft measurements (aircraft-based XCO2), tower measurements and model outputs were used for additional information near the surface and above the tropopause, respectively. Before validation, we investigated the impacts of GOSAT SWIR column averaging kernels (CAKs) and the shape of a priori profiles on the aircraft-based XCO2 calculation. The differences between aircraft-based XCO2 with and without the application of GOSAT CAK were evaluated to be less than ±0.4 ppm at most, and less than ±0.1 ppm on average. Therefore, we concluded that the GOSAT CAK produces only a minor effect on the aircraft-based XCO2 calculation in terms of the overall uncertainty of GOSAT XCO2. We compared GOSAT data retrieved within ±2 or ±5° latitude/longitude boxes centered at each aircraft measurement site to aircraft-based data measured on a GOSAT overpass day. The results indicated that GOSAT XCO2 over land regions agreed with aircraft-based XCO2, except that the former is biased by −0.68 ppm (−0.99 ppm) with a standard deviation of 2.56 ppm (2.51 ppm), whereas the averages of the differences between the GOSAT XCO2 over ocean and the aircraft-based XCO2 were −1.82 ppm (−2.27 ppm) with a standard deviation of 1.04 ppm (1.79 ppm) for ±2° (±5°) boxes.

[1]  Taro Takahashi,et al.  Towards robust regional estimates of CO2 sources and sinks using atmospheric transport models , 2002, Nature.

[2]  Hartmut Boesch,et al.  Orbiting Carbon Observatory: Inverse method and prospective error analysis , 2008 .

[3]  James B. Abshire,et al.  Calibration of the Total Carbon Column Observing Network using aircraft profile data , 2010 .

[4]  William L. Smith,et al.  AIRS/AMSU/HSB on the Aqua mission: design, science objectives, data products, and processing systems , 2003, IEEE Trans. Geosci. Remote. Sens..

[5]  Ian G. Enting,et al.  Inverse problems in atmospheric constituent transport , 2002 .

[6]  G. Toon,et al.  Carbon dioxide column abundances at the Wisconsin Tall Tower site , 2006 .

[7]  Y. Sawa,et al.  Seasonal variations of CO2 near the tropopause observed by commercial aircraft , 2008 .

[8]  Peter F. Bernath,et al.  Atmospheric chemistry experiment (ACE): mission overview , 2004, SPIE Optics + Photonics.

[9]  Eric R. Crosson,et al.  High-accuracy continuous airborne measurements of greenhouse gases (CO2 and CH4) using the cavity ring-down spectroscopy (CRDS) technique , 2010 .

[10]  T. Machida,et al.  Aircraft measurements of the concentrations of CO2, CH4, N2O, and CO and the carbon and oxygen isotopic ratios of CO2 in the troposphere over Russia , 1997 .

[11]  C. D. Keeling,et al.  The concentration of atmospheric carbon dioxide in Hawaii , 1965 .

[12]  S. Murayama,et al.  Measurements of atmospheric methane at the Japanese Antarctic Station, Syowa , 1992 .

[13]  H. Matsueda,et al.  Measurements of atmospheric CO2 and CH4 using a commercial airliner from 1993 to 1994 , 1996 .

[14]  Shamil Maksyutov,et al.  Interannual variability and trends in atmospheric methane over the western Pacific from 1994 to 2010 , 2011 .

[15]  Hiroshi Watanabe,et al.  Effects of atmospheric light scattering on spectroscopic observations of greenhouse gases from space. Part 2: Algorithm intercomparison in the GOSAT data processing for CO2 retrievals over TCCON sites , 2013 .

[16]  D. Blake,et al.  Continuing Worldwide Increase in Tropospheric Methane, 1978 to 1987 , 1988, Science.

[17]  Vivienne H. Payne,et al.  Validation of TES methane with HIPPO aircraft observations: implications for inverse modeling of methane sources , 2011 .

[18]  Shamil Maksyutov,et al.  Analysis and presentation of in situ atmospheric methane measurements from Cape Ochi‐ishi and Hateruma Island , 2002 .

[19]  O. Schneising,et al.  SCIAMACHY WFM-DOAS X CO 2 : reduction of scattering related errors , 2012 .

[20]  Yoshifumi Ota,et al.  CO2 retrieval algorithm for the thermal infrared spectra of the Greenhouse Gases Observing Satellite: Potential of retrieving CO2 vertical profile from high‐resolution FTS sensor , 2009 .

[21]  Peter Bergamaschi,et al.  Atmospheric methane and carbon dioxide from SCIAMACHY satellite data: initial comparison with chemistry and transport models , 2004 .

[22]  Mountaintop observation of CO2 absorption spectra using a short wavelength infrared Fourier transform spectrometer. , 2010, Applied optics.

[23]  Justus Notholt,et al.  The Total Carbon Column Observing Network , 2011, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[24]  Peter Bergamaschi,et al.  Three years of greenhouse gas column-averaged dry air mole fractions retrieved from satellite - Part 2: Methane , 2008 .

[25]  Y. Sawa,et al.  CO 2 column-averaged volume mixing ratio derived over Tsukuba from measurements by commercial airlines , 2010 .

[26]  Peter Bergamaschi,et al.  Atmospheric greenhouse gases retrieved from SCIAMACHY: comparison to ground-based FTS measurements and model results , 2011 .

[27]  P. Tans,et al.  Latitudinal distribution of the sources and sinks of atmospheric carbon dioxide derived from surface observations and an atmospheric transport model , 1989 .

[28]  H. Kida.  General Circulation of Air Parcels and Transport Characteristics Derived from a Hemispheric GCM: Part 2. Very Long-Term Motions of Air Parcels in the Troposphere and Stratosphere@@@第二部 対流圏と成層圏における空気塊の長時間運動 , 1983 .

[29]  Tatsuya Yokota,et al.  Global Concentrations of CO2 and CH4 Retrieved from GOSAT: First Preliminary Results , 2009 .

[30]  Jianping Mao,et al.  Sensitivity studies for space-based measurement of atmospheric total column carbon dioxide by reflected sunlight. , 2004, Applied optics.

[31]  J. Randerson,et al.  New constraints on Northern Hemisphere growing season net flux , 2007 .

[32]  Eric A. Kort,et al.  Atmospheric observations of Arctic Ocean methane emissions up to 82° north , 2012 .

[33]  Hartmut Boesch,et al.  Methane observations from the Greenhouse Gases Observing SATellite: Comparison to ground‐based TCCON data and model calculations , 2011 .

[34]  H. Inoue,et al.  Variations in atmospheric CO2 at the Meteorological Research Institute, Tsukuba, Japan , 1996 .

[35]  Shamil Maksyutov,et al.  Inverse Modeling of CO2 Fluxes Using GOSAT Data and Multi-Year Ground-Based Observations , 2013 .

[36]  Toshinobu Machida,et al.  Worldwide Measurements of Atmospheric CO2 and Other Trace Gas Species Using Commercial Airlines , 2008 .

[37]  P. Tans,et al.  Atmospheric carbon dioxide measurements in the remote global troposphere, 1981-1984 , 1988 .

[38]  K. Thoning,et al.  Atmospheric carbon dioxide at Mauna Loa Observatory: 1. NOAA global monitoring for climatic change measurements with a nondispersive infrared analyzer, 1974-1985 , 1989 .

[39]  Tatsuya Yokota,et al.  Improvement of the retrieval algorithm for GOSAT SWIR XCO2 and XCH4 and their validation using TCCON data , 2013 .

[40]  Justus Notholt,et al.  Calibration of TCCON column-averaged CO2: the first aircraft campaign over European TCCON sites , 2011 .

[41]  Shamil Maksyutov,et al.  Distribution of tropospheric methane over Siberia in July 1993 , 1997 .

[42]  Tatsuya Yokota,et al.  Retrieval algorithm for CO 2 and CH 4 column abundances from short-wavelength infrared spectral observations by the Greenhouse gases observing satellite , 2010 .

[43]  J. Barnett,et al.  Zonal mean temperature, pressure, zonal wind and geopotential height as functions of latitude , 1990 .

[44]  S. Wofsy,et al.  Mean Ages of Stratospheric Air Derived from in Situ Observations of Co2, Ch4, and N2o , 2013 .

[45]  Y. Sawa,et al.  Seasonal variation of enhancement ratios of trace gases observed over 10 years in the western North Pacific , 2011 .

[46]  J. F. Meirink,et al.  Inverse Modeling of Global and Regional CH4 Emissions Using SCIAMACHY Satellite Retrievals , 2009 .

[47]  Hidekazu Matsueda,et al.  Aircraft observation of carbon dioxide at 8–13 km altitude over the western Pacific from 1993 to 1999 , 2002 .

[48]  Christopher R. Webster,et al.  Validation of Halogen Occultation Experiment CH4 measurements from the UARS , 1996 .

[49]  Makoto Saito,et al.  Regional CO2 flux estimates for 2009–2010 based on GOSAT and ground-based CO2 observations , 2012 .

[50]  Masakatsu Nakajima,et al.  Thermal and near infrared sensor for carbon observation Fourier-transform spectrometer on the Greenhouse Gases Observing Satellite for greenhouse gases monitoring. , 2009, Applied optics.

[51]  G. Dutton,et al.  Transport mechanisms for synoptic, seasonal and interannual SF 6 variations and "age" of air in troposphere , 2009 .

[52]  M. Ishizawa,et al.  TWO CURVE FITTING METHODS APPLIED TO CO2 FLASK DATA , 1997 .

[53]  Colette Brogniez,et al.  Validation of ACE-FTS v2.2 methane profiles from the upper troposphere to the lower mesosphere , 2008 .

[54]  P. Fraser,et al.  Trends of atmospheric methane in the southern hemisphere , 1981 .

[55]  Michael Buchwitz,et al.  Three years of greenhouse gas column-averaged dry air mole fractions retrieved from satellite – Part 1: Carbon dioxide , 2008 .

[56]  J. Notholt,et al.  Automated ground-based remote sensing measurements of greenhouse gases at the Białystok site in comparison with collocated in situ measurements and model data , 2011 .

[57]  A. Hollingsworth,et al.  Signatures of Annual and Seasonal Variations of CO2 and Other Greenhouse Gases from Comparisons between NOAA TOVS Observations and Radiation Model Simulations , 2002 .

[58]  S. Houweling,et al.  Reduced carbon uptake during the 2010 Northern Hemisphere summer from GOSAT , 2013 .

[59]  Tatsuya Yokota,et al.  Preliminary validation of column-averaged volume mixing ratios of carbon dioxide and methane retrieved from GOSAT short-wavelength infrared spectra , 2010 .

[60]  Y. Sawa,et al.  Evaluation of atmospheric CO2 measurements from new flask air sampling of JAL airliner observations , 2008 .

[61]  大山 博史.  Column-averaged volume mixing ratio of CO2 measured with ground-based Fourier transform spectrometer at Tsukuba , 2009 .

[62]  Edward J. Dlugokencky,et al.  The growth rate and distribution of atmospheric methane , 1994 .

[63]  P. Bernath,et al.  Technical Note: A trace gas climatology derived from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) data set , 2011 .

[64]  Colm Sweeney,et al.  A multi-year record of airborne CO 2 observations in the US Southern Great Plains , 2012 .

[65]  C. Sweeney,et al.  Atmospheric column-averaged mole fractions of carbon dioxide at 53 aircraft measurement sites , 2012 .

[66]  D. Davydov,et al.  Continuous measurements of methane from a tower network over Siberia , 2010 .

[67]  Shamil Maksyutov,et al.  NIES/FRCGC Global Atmospheric Tracer Transport Model: Description, Validation, and Surface Sources and Sinks Inversion , 2008 .

[68]  Ilse Aben,et al.  Methane retrievals from Greenhouse Gases Observing Satellite (GOSAT) shortwave infrared measurements: Performance comparison of proxy and physics retrieval algorithms , 2012 .

[69]  Shuji Kawakami,et al.  Aircraft measurements of carbon dioxide and methane for the calibration of ground-based high-resolution Fourier Transform Spectrometers and a comparison to GOSAT data measured over Tsukuba and Moshiri , 2012 .

[70]  Makoto Saito,et al.  On the Benefit of GOSAT Observations to the Estimation of Regional CO2 Fluxes , 2011 .

[71]  Alex Vermeulen,et al.  The state of greenhouse gases in the atmosphere using global observations through 2018 , 2009 .

[72]  Peter Bergamaschi,et al.  Four‐dimensional variational data assimilation for inverse modeling of atmospheric methane emissions: Analysis of SCIAMACHY observations , 2008 .

[73]  Shamil Maksyutov,et al.  Global high-resolution simulations of CO 2 and CH 4 using a NIES transport model to produce a priori concentrations for use in satellite data retrievals , 2012 .

[74]  Tatsuya Yokota,et al.  Influence of aerosols and thin cirrus clouds on the GOSAT-observed CO 2 : a case study over Tsukuba , 2011 .

[75]  Kazuhiro Tsuboi,et al.  Interannual Variation of Growth Rate of Atmospheric Carbon Dioxide Concentration Observed at the JMA , 2000 .

[76]  Justus Notholt,et al.  Calibration of column-averaged CH4 over European TCCON FTS sites with airborne in-situ measurements , 2012 .

[77]  A. J. Crawford,et al.  The global distribution of methane in the troposphere , 1987 .

[78]  Alain Chedin,et al.  Midtropospheric CO2 concentration retrieval from AIRS observations in the tropics , 2004 .

[79]  P. Rayner,et al.  The utility of remotely sensed CO2 concentration data in surface source inversions , 2001 .

[80]  Ilse Aben,et al.  Evidence of systematic errors in SCIAMACHY-observed CO 2 due to aerosols , 2005 .

[81]  C. Clerbaux,et al.  Trace gas measurements from infrared satellite for chemistry and climate applications , 2003 .

[82]  M. Buchwitz,et al.  Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH 4 , CO 2 and N 2 O , 2005 .

[83]  Graeme L. Stephens,et al.  Retrieving profiles of atmospheric CO2 in clear sky and in the presence of thin cloud using spectroscopy from the near and thermal infrared: A preliminary case study , 2004 .

[84]  Y. Niwa,et al.  Carbon balance of South Asia constrained by passenger aircraft CO 2 measurements , 2011 .

[85]  S. Wofsy,et al.  HIAPER Pole-to-Pole Observations (HIPPO): fine-grained, global-scale measurements of climatically important atmospheric gases and aerosols , 2011, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[86]  H. Matsueda,et al.  Measurements of atmospheric CO2 from a meteorological tower in Tsukuba, Japan , 2001 .

[87]  L. A. Cavanagh,et al.  Atmospheric hydrocarbon and carbon monoxide measurements at Point Barrow, Alaska , 1969 .

[88]  Alain Chedin,et al.  Tropospheric methane in the tropics – first year from IASI hyperspectral infrared observations , 2009 .

[89]  Technical Note: Latitude-time variations of atmospheric column-average dry air mole fractions of CO 2 , CH 4 and N 2 O , 2012 .

[90]  S. Aoki,et al.  Temporal and spatial variations of the carbon isotopic ratio of atmospheric carbon dioxide in the western Pacific region , 1997 .

[91]  Takuma Takasao,et al.  Short‐term rainfall prediction method using a volume scanning radar and grid point value data from numerical weather prediction , 1996 .

[92]  R. Weiss,et al.  Estimating regional methane surface fluxes: the relative importance of surface and GOSAT mole fraction measurements , 2012 .

[93]  Y. Sawa,et al.  Column‐averaged volume mixing ratio of CO2 measured with ground‐based Fourier transform spectrometer at Tsukuba , 2009 .

[94]  B. Connor,et al.  Intercomparison of remote sounding instruments , 1999 .

[95]  Michael Buchwitz,et al.  A method for improved SCIAMACHY CO 2 retrieval in the presence of optically thin clouds , 2009 .

[96]  Christopher D. Barnet,et al.  CO2 retrievals from the Atmospheric Infrared Sounder : Methodology and validation , 2008 .

[97]  L. Munchak,et al.  Relationship of cloud top to the tropopause and jet structure from CALIPSO data , 2011 .

[98]  Christopher D. Barnet,et al.  Characterization and validation of methane products from the Atmospheric Infrared Sounder (AIRS) , 2008 .

[99]  Hideyuki Honda,et al.  Measurements of the stratospheric carbon dioxide concentration over Japan using a Balloon‐borne cryogenic sampler , 1995 .

[100]  Ryoichi Imasu,et al.  Imposing strong constraints on tropical terrestrial CO2 fluxes using passenger aircraft based measurements , 2011 .