profile retrieval
DESCRIPTION
Profile Retrieval. Yuk Yung – PI Xun Jiang – Co-I* Collaborators – Sally Newman (Caltech), Elva Kuai * (JPL), Ed Olsen (JPL ), Susan Kulawik (JPL) Charles Miller (JPL), Vijay Natraj (JPL) , Brian Connor (NZ), Fai Li (Caltech), Run -Lie Shia (Caltech). - PowerPoint PPT PresentationTRANSCRIPT
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Profile Retrieval
Yuk Yung – PIXun Jiang – Co-I*
Collaborators – Sally Newman (Caltech), Elva Kuai* (JPL), Ed Olsen (JPL), Susan Kulawik (JPL)Charles Miller (JPL), Vijay Natraj (JPL), Brian Connor (NZ), Fai Li (Caltech), Run-Lie Shia (Caltech)
OCO-2 Science Team Meeting 16-17 Feb 2012 Pasadena
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A Year of CO2 Measurements at Caltech, Palos Verdes, and Mt. Wilson (CARB)
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Information Theory Analysis for TCCON measurements
snr H DOF885 14.2 4.2200 6.9 2.6
Sa(i, i) = (3%)2
Noise=max(Tr)/snr (/ppm)
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Spectroscopic Parameters
• 0 = 6243.9 cm-1
• = 0.02 cm-1
• S = 1.5310-23 cm• = 7.510-5 mbar cm-1
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Transmittance and its Jacobian for one absorption line with broadening
CJ.dat.in CJ.dat.in
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Transmittance and reflectance and their Jacobian for one absorption line with broadening
CJ.dat.in CJ.dat.in
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Thanks
• Kuai et al. 2012, JQSRT, in review• Shia et al. 2012, in preparation• Jiang et al. 2012, in preparation
• JPL, AIRS, OCO-2, Dave Crisp, John Trauger, Jack Margolis, Linda Brown
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Extra Slides
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Motivation for profile retrieving of CO2
• Over-prediction of the annual-mean midday vertical gradients in most current model lead to miss-interpretation of carbon uptake in northern lands and tropical forests [Stephen et al., 2007, Sarrat et al., 2007]
• Boundary layer CO2 v.s. XCO2 [Keppel-Aleks et al., 2011]
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2004/07/12 2004/07/15 2004/08/02 2008/05/12
2009/01/30 2009/07/31 2009/08/02 2009/08/03 2010/07/18
Park falls:
Lamont:
Profile comparison
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Column comparison
Bias: -1.4%-1.1%
Precision: 0.13%0.25%
Wunch, et al., 2011
Park Falls and Lamont
RMS = 0.50 ppm
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Total Carbon Column Observing Network (TCCON)
• Ground-based FTS• Direct solar spectra in NIR.• Column-averaged abundance of CO2, CH4, N2O, HF, CO, H2O, and HDO• Validation resource for satellite measurements (OCO, GOSAT,
SCIAMACHY,……)