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

A Year of CO2 Measurements at Caltech, Palos Verdes, and Mt. Wilson (CARB)

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)

Spectroscopic Parameters

• 0 = 6243.9 cm-1

• = 0.02 cm-1

• S = 1.5310-23 cm• = 7.510-5 mbar cm-1

Transmittance and its Jacobian for one absorption line with broadening

CJ.dat.in CJ.dat.in

Transmittance and reflectance and their Jacobian for one absorption line with broadening

CJ.dat.in CJ.dat.in

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

Extra Slides

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]

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

Column comparison

Bias: -1.4%-1.1%

Precision: 0.13%0.25%

Wunch, et al., 2011

Park Falls and Lamont

RMS = 0.50 ppm

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,……)