Extracting column densities of CO2 from Envisat/Sciamachy spectra

Details Extracting column densities of CO2 from Envisat/Sciamachy spectra Extracting column densities of CO2 from Envisat/Sciamachy spectra

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....5032s&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #5032

Computer Science

Scientific paper

The instrument SCIAMACHY (Scanning Imaging Absorption Spectrometer for Atmospheric Cartography) observes the Earth atmosphere in the range 240-2385 nm with a moderate resolution (0.2-1.6 nm), in nadir, limb and solar and lunar occultation viewing geometries. The spectral range is divided into 8 channels. The aim of this work is to retrieve the atmospheric CO_2 total column amounts from nadir measurements. In the Sciamachy spectral range, CO_2 is characterized by two doublets around 1600 nm (channel 6, 1000-1750 nm), and by a larger infrared band in channel 7 (1940-2040 nm). Due to ice deposit, the signal to noise ratio of channels 7 and 8 is lower than predicted and the first data available were not usable for such study. Therefore we decided to work with the CO_2 doublets around 1600 nm. Gas total amounts are derived from the radiance measurements, using the inverse radiative transfer modelling developed. We worked on the release data sample (orbit 2338, 2002 August 11), which are level 1b data (non calibrated). We used the Enviview package distributed by ESA to calibrate the radiance measurements. In a first time, we have selected a clear and bright region over Sahara. We validated the method with the A band of O_2, located around 760 nm (channel 4), then we worked with the CO_2 doublets. We present here comparison between measurements and modelled spectra, and the results of the inversion for the whole orbit.

Affiliated with

Also associated with

No associations

Rating

Extracting column densities of CO2 from Envisat/Sciamachy spectra does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Extracting column densities of CO2 from Envisat/Sciamachy spectra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extracting column densities of CO2 from Envisat/Sciamachy spectra will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-843084