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| Titel |
Retrievals of CO2 and Surface Pressure from GOSAT TANSO FTS radiances in pristine conditions |
| VerfasserIn |
Clark Weaver, Jianping Mao, Stephen R. Kawa, James Abshire |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250056826
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| Zusammenfassung |
| We present preliminary results of retrieved CO2 mixing ratio and surface pressure over
pristine locations using GOSAT TANSO-Fourier Transform Spectrometer radiances from
Band 1 (Â 0.765um) and Band 2 (Â 1.65um). The algorithm is based on the Gauss-Newton
method. Aerosol absorption and scattering and Rayleigh scattering is simulated with a
Gauss-Seidel vector radiative transfer model. Gaseous absorption is modeled with a
either a Voigt or a Speed Dependent profile and the HIRTRAN 2008 spectroscopic
parameters.
We focus on GOSAT retrievals over two locations with minimal aerosol optical depth:
Birdsville Australia and Railroad Valley Nevada. These are both AERONET (AErosol
RObotic NETwork) sites so aerosol absorption and size distribution information are available.
We will examine retrievals from pristine days with almost no aerosol scattering and days with
moderate aerosol loading. Retrieved CO2 concentrations will be compared with the closest
TCCON sites. A three-dimensional chemistry transport model will facilitate the comparison
between the CO2 concentrations at the TCCON sites and the retrieved values at the
AERONET sites. We will also show the wavelength dependence of the retrieved residuals -
the best fit model simulated radiances minus the GOSAT observations – for both GOSAT
bands. |
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