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Yang D, Boesch H, Liu Y, Somkuti P, Cai Z, Chen X, Di Noia A, Lin C, Lu N, Lyu D, Parker RJ, Tian L, Wang M, Webb A, Yao L, Yin Z, Zheng Y, Deutscher NM, Griffith DWT, Hase F, Kivi R, Morino I, Notholt J, Ohyama H, Pollard DF, Shiomi K, Sussmann R, Té Y, Velazco VA, Warneke T, Wunch D. Toward High Precision XCO 2 Retrievals From TanSat Observations: Retrieval Improvement and Validation Against TCCON Measurements. J Geophys Res Atmos 2020; 125:e2020JD032794. [PMID: 33777605 PMCID: PMC7983077 DOI: 10.1029/2020jd032794] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 07/22/2020] [Accepted: 07/24/2020] [Indexed: 06/12/2023]
Abstract
TanSat is the 1st Chinese carbon dioxide (CO2) measurement satellite, launched in 2016. In this study, the University of Leicester Full Physics (UoL-FP) algorithm is implemented for TanSat nadir mode XCO2 retrievals. We develop a spectrum correction method to reduce the retrieval errors by the online fitting of an 8th order Fourier series. The spectrum-correction model and its a priori parameters are developed by analyzing the solar calibration measurement. This correction provides a significant improvement to the O2 A band retrieval. Accordingly, we extend the previous TanSat single CO2 weak band retrieval to a combined O2 A and CO2 weak band retrieval. A Genetic Algorithm (GA) has been applied to determine the threshold values of post-screening filters. In total, 18.3% of the retrieved data is identified as high quality compared to the original measurements. The same quality control parameters have been used in a footprint independent multiple linear regression bias correction due to the strong correlation with the XCO2 retrieval error. Twenty sites of the Total Column Carbon Observing Network (TCCON) have been selected to validate our new approach for the TanSat XCO2 retrieval. We show that our new approach produces a significant improvement on the XCO2 retrieval accuracy and precision when compared to TCCON with an average bias and RMSE of -0.08 ppm and 1.47 ppm, respectively. The methods used in this study can help to improve the XCO2 retrieval from TanSat and subsequently the Level-2 data production, and hence will be applied in the TanSat operational XCO2 processing.
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Affiliation(s)
- D. Yang
- Earth Observation Science, School of Physics and AstronomyUniversity of LeicesterUK
- Institute of Atmospheric PhysicsChinese Academy of SciencesChina
- Shanghai Advanced Research InstituteChinese Academy of SciencesShanghaiChina
| | - H. Boesch
- Earth Observation Science, School of Physics and AstronomyUniversity of LeicesterUK
- National Centre for Earth ObservationUniversity of LeicesterUK
| | - Y. Liu
- Institute of Atmospheric PhysicsChinese Academy of SciencesChina
- Shanghai Advanced Research InstituteChinese Academy of SciencesShanghaiChina
| | - P. Somkuti
- Earth Observation Science, School of Physics and AstronomyUniversity of LeicesterUK
- National Centre for Earth ObservationUniversity of LeicesterUK
- Colorado State UniversityFort CollinsCOUSA
| | - Z. Cai
- Institute of Atmospheric PhysicsChinese Academy of SciencesChina
| | - X. Chen
- Institute of Atmospheric PhysicsChinese Academy of SciencesChina
| | - A. Di Noia
- Earth Observation Science, School of Physics and AstronomyUniversity of LeicesterUK
- National Centre for Earth ObservationUniversity of LeicesterUK
| | - C. Lin
- Changchun Institute of Optics, Fine Mechanics and PhysicsChina
| | - N. Lu
- National Satellite Meteorological Center, China Meteorological AdministrationChina
| | - D. Lyu
- Institute of Atmospheric PhysicsChinese Academy of SciencesChina
| | - R. J. Parker
- Earth Observation Science, School of Physics and AstronomyUniversity of LeicesterUK
- National Centre for Earth ObservationUniversity of LeicesterUK
| | - L. Tian
- Shanghai Engineering Center for MicrosatellitesChina
| | - M. Wang
- Shanghai Advanced Research InstituteChinese Academy of SciencesShanghaiChina
| | - A. Webb
- Earth Observation Science, School of Physics and AstronomyUniversity of LeicesterUK
- National Centre for Earth ObservationUniversity of LeicesterUK
| | - L. Yao
- Institute of Atmospheric PhysicsChinese Academy of SciencesChina
| | - Z. Yin
- Shanghai Engineering Center for MicrosatellitesChina
| | - Y. Zheng
- Changchun Institute of Optics, Fine Mechanics and PhysicsChina
| | - N. M. Deutscher
- Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life SciencesUniversity of WollongongNSWAustralia
| | - D. W. T. Griffith
- Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life SciencesUniversity of WollongongNSWAustralia
| | - F. Hase
- Karlsruhe Institute of Technology, IMK‐IFUGarmisch‐PartenkirchenGermany
| | - R. Kivi
- Space and Earth Observation CentreFinnish Meteorological InstituteFinland
| | - I. Morino
- National Institute for Environmental Studies (NIES)TsukubaIbarakiJapan
| | - J. Notholt
- Institute of Environmental Physics (IUP)University of BremenBremenGermany
| | - H. Ohyama
- National Institute for Environmental Studies (NIES)TsukubaIbarakiJapan
| | - D. F. Pollard
- National Institute of Water and Atmospheric Research Ltd (NIWA)LauderNew Zealand
| | - K. Shiomi
- Japan Aerospace Exploration AgencyJapan
| | - R. Sussmann
- Karlsruhe Institute of Technology, IMK‐IFUGarmisch‐PartenkirchenGermany
| | - Y. Té
- Laboratoire d'Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères (LERMA‐IPSL)Sorbonne Université, CNRS, Observatoire de Paris, PSL UniversitéParisFrance
| | - V. A. Velazco
- Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life SciencesUniversity of WollongongNSWAustralia
| | - T. Warneke
- Institute of Environmental Physics (IUP)University of BremenBremenGermany
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Vogelmann H, Sussmann R, Trickl T, Reichert A. Spatio-Temporal Variability of Water Vapor in the Free Troposphere Investigated by Dial and Ftir Vertical Soundings. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611924006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Schepers D, Guerlet S, Butz A, Landgraf J, Frankenberg C, Hasekamp O, Blavier JF, Deutscher NM, Griffith DWT, Hase F, Kyro E, Morino I, Sherlock V, Sussmann R, Aben I. Methane retrievals from Greenhouse Gases Observing Satellite (GOSAT) shortwave infrared measurements: Performance comparison of proxy and physics retrieval algorithms. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2012jd017549] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
Photographs of a 120 degrees parhelion and a 22 degrees parhelion within persistent contrails are presented. These phenomena result from hexagonal plate-shaped ice crystals oriented horizontally with diameters between 300 mum and 2 mm. From our observations and reinvestigation of previous reports, we conclude that a subset of the population in persistent contrails can consist of highly regular, oriented, hexagonal plates or columns comparable to the most regular crystals in natural cirrus clouds. This is explained by measured ambient humidities below the formation conditions of natural cirrus. The resulting strong azimuthal variability of the scattering phase function impacts the radiative transfer through persistent contrails.
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Sussmann R, Schäfer K. Infrared spectroscopy of tropospheric trace gases: combined analysis of horizontal and vertical column abundances. Appl Opt 1997; 36:735-741. [PMID: 18250733 DOI: 10.1364/ao.36.000735] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Vibration-rotation absorptions in high-resolution Fourier-transform infrared spectra from a 246-m horizontal path were used to derive local concentrations of trace gases at the Alpine observatory at the Zugspitze summit, Germany (2964 m above sea level). The analysis was performed by using the line-by-line nonlinear least-squares spectral fitting software, SFIT, based on the 1992 HITRAN line parameter compilation. (HITRAN is a high-resolution transmission molecular absorption database.) A comparison to in situ measurements shows an agreement of better than 4.3% for the species CO, CO(2), and CH(4). Using the same spectrometer and analysis software, we obtained the vertical column density of N(2)O together with an adjusted vertical volume mixing ratio distribution. This translates to a local N(2)O concentration at the altitude of Zugspitze that agrees with the horizontal path-derived value to within 1%.
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Affiliation(s)
- R Sussmann
- Fraunhofer-Institut für Atmosphärische Umweltforschung, Kreuzeckbahnstrasse 19, D-82467 Garmisch-Partenkirchen, Germany
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Riedle E, Sussmann R, Weber T, Neusser HJ. Rotationally resolved vibronic spectra of the van der Waals modes of benzene–Ar and benzene–Kr complexes. J Chem Phys 1996. [DOI: 10.1063/1.470811] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sussmann R, Neuhauser R, Neusser HJ. Coherent ion dip spectroscopy of the ground state benzene–Ar complex: Vibration–rotation levels up to 130 cm−1 intermolecular energy. J Chem Phys 1995. [DOI: 10.1063/1.470265] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Neuhauser R, Sussmann R, Neusser HJ. Line shapes in coherent ion dip spectroscopy of polyatomic molecules. Phys Rev Lett 1995; 74:3141-3144. [PMID: 10058122 DOI: 10.1103/physrevlett.74.3141] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Sussmann R, Neusser HJ. The van der Waals rovibronic spectrum of p‐difluorobenzene–Ar up to 125 cm−1 intermolecular energy: Assignment and character of van der Waals modes. J Chem Phys 1995. [DOI: 10.1063/1.468615] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Sussmann R, Zitt U, Neusser HJ. Microsolvation of aromatic molecules by argon: Structure of fluorene–(Ar)2 from high‐resolution ultraviolet spectroscopy. J Chem Phys 1994. [DOI: 10.1063/1.468017] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sussmann R, Neuhauser R, Neusser HJ. Stimulated Raman adiabatic passage with pulsed lasers: High resolution ion dip spectroscopy of polyatomic molecules. J Chem Phys 1994. [DOI: 10.1063/1.466269] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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