SCIAMACHY performance, retrieval, and validation of near-infrared CO, CH4, and CO2 measurements
Abstract
A good knowledge of the global distribution of the gases CO, CH4, and CO2 is needed in order to fully understand their role in atmospheric chemistry. These gases are important components in the interactions between long-term changes in atmospheric composition and global climate change. Measurements from satellites give an excellent opportunity for mapping the global distribution of these gases. The SCIAMACHY instrument, launched onboard the ENVISAT satellite on 1 March 2002, measures from the ultraviolet (at 240 nm) to the shortwave infrared (at 2380 nm). SCIAMACHY channels 6 and 7 are used to retrieve CO2, and CO and CH4 are retrieved from channel 8 together with H2O and N2O. In-flight calibration and characterisation of these detectors is done at SRON. The results from the channel 8 in-flight performance will be presented here together with the above mentioned total columns retrieved by algorithms developed at SRON. The columns are verified and validated by comparison to measurements by the MOPITT instrument, ground-based measurements, and calculations by a chemical transport model.
- Publication:
-
EGS - AGU - EUG Joint Assembly
- Pub Date:
- April 2003
- Bibcode:
- 2003EAEJA.....9251S