HR: 1340h
AN: A33D-0106    [Abstracts]
TI: The Orbiting Carbon Observatory (OCO) Mission: Validation Strategy and First Retrieval Results
AU: * Boesch, H
EM: hartmut.boesch@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Burrows, J P
EM: burrows@iup.physik.uni-bremen.de
AF: Institute of Environmental Physics, University of Bremen, Otto-Hahn-Allee 1, Bremen, 28359 Germany
AU: Christi, M
EM: mick@atmos.colostate.edu
AF: Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523 United States
AU: Connor, B J
EM: b.connor@niwa.co.nz
AF: National Institute of Water and Atmospheric Research, PB 50061, Omakau, 9182 New Zealand
AU: Crisp, D
EM: david.crisp@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Kuang, Z
EM: kzm@atmos.washington.edu
AF: Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195 United States
AU: Miller, C E
EM: charles.e.miller@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Natraj, V
EM: vij@its.caltech.edu
AF: Division of Geological and Planetary Sciences, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Salawitch, R J
EM: rjs@caesar.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Sen, B
EM: bhaswar.sen@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Toon, G C
EM: geoffrey.c.toon@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Wennberg, P O
EM: wennberg@gps.caltech.edu
AF: Division of Geological and Planetary Sciences, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Yung, Y L
EM: yly@gps.caltech.edu
AF: Division of Geological and Planetary Sciences, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AB: The Orbiting Carbon Observatory (OCO) mission will make the first global, space-based measurements of atmospheric CO2 with the precision, resolution, and coverage needed to characterize CO2 sources and sinks on regional scales. During its 2-year mission, OCO will fly in a sun-synchronous orbit with a 16-day ground-track repeat time, just ahead of the EOS Aqua platform. OCO incorporates three bore-sighted high-resolution spectrometers to measure reflected sunlight in the O2 A-band and in the CO2 bands at 1.61 and 2.06 microns. Soundings recorded in these three bands will be analyzed simultaneously to retrieve the column-averaged CO2 dry air mole fraction. In order to verify and improve the space-based CO2 measurements the OCO project incorporates a comprehensive validation program based on ground-based Fourier Transform Spectrometers (FTS) measuring direct sunlight. These measurements are ideally suited since the vertical sensitivity is very similar and the same quantity is measured using the same O2 and CO2 absorption bands as OCO. As an important part of this strategy these FTS measurements will be analyzed using the same retrieval algorithm as for the space-based measurements. In this paper we will discuss the OCO retrieval algorithm and the validation strategy. Also we will present some first results obtained with the OCO retrieval algorithm using space-based SCIAMACHY and ground-based FTS measurements. These retrieval exercises are especially helpful for the characterisation and validation of the retrieval algorithm under realistic measurement conditions.
DE: 1610 Atmosphere (0315, 0325)
DE: 1640 Remote sensing
DE: 0322 Constituent sources and sinks
DE: 0360 Transmission and scattering of radiation
DE: 0365 Troposphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting