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Intercomparison of vertical column densities derived from SCIAMACHY Infrared Nadir Observations

Schreier, Franz and Gimeno-Garcia, Sebastian and Hess, Michael and Doicu, Adrian and von Bargen, Albrecht and Buchwitz, Michael and Khlystova, Iryna and Bovensmann, Heinrich and Burrows, John P. (2007) Intercomparison of vertical column densities derived from SCIAMACHY Infrared Nadir Observations. ESA. ENVISAT Symposium, 2007-04-23 - 2007-04-27, Montreux, CH.

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Abstract

Nadir observations in the shortwave infrared channels of SCIAMACHY onboard the ENVISAT satellite can be used to derive information on CO, CH4, N2O, CO2, and H2O. Several scientific data analysis tools have been developed for retrieval of vertical column densities, and a significant upgrade of the operational level 2 data processor has been prototyped recently. WFM-DOAS, developed by University of Bremen, is a modified DOAS algorithm: A linearized radiative transfer model plus a low order polynomial is linear least squares fitted to the logarithm of the measured sun-normalized radiance. On the other hand, BIRRA (implemented at DLR) is a nonlinear least squares fit of the measured radiance. Trace gas vertical profiles are scaled in both cases to fit the observed data, further auxiliary parameters are code dependant. In this contribution we present results of an intercomparison of vertical column densities, nb. carbon monoxide, retrieved from SCIAMACHY infrared nadir observations.

Document Type:Conference or Workshop Item (Paper, Poster)
Title:Intercomparison of vertical column densities derived from SCIAMACHY Infrared Nadir Observations
Authors:
AuthorsInstitution or Email of Authors
Schreier, FranzUNSPECIFIED
Gimeno-Garcia, SebastianUNSPECIFIED
Hess, MichaelUNSPECIFIED
Doicu, AdrianUNSPECIFIED
von Bargen, AlbrechtUNSPECIFIED
Buchwitz, MichaelUniversity of Bremen
Khlystova, IrynaUniversity of Bremen
Bovensmann, HeinrichUniversity of Bremen
Burrows, John P.University of Bremen
Date:April 2007
Page Range:pp. 1-6
Editors:
EditorsEmail
Desnos, Y.L.UNSPECIFIED
Lacoste, H.UNSPECIFIED
Publisher:ESA
Series Name:SP-636
Status:Published
Keywords:atmospheric remote sensing, nadir observations, near infrared, SCIAMACHY
Event Title:ENVISAT Symposium
Event Location:Montreux, CH
Event Type:international Conference
Event Dates:2007-04-23 - 2007-04-27
Organizer:ESA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Entwicklung von Atmosphärenprozessoren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Dr.rer.nat. Franz Schreier
Deposited On:17 Jul 2007
Last Modified:12 Dec 2013 20:08

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