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Impact of Spectroscopic Line Parameters on Carbon Monoxide Column Density Retrievals from Shortwave Infrared Nadir Observations

Schmidt, Denise and Gimeno Garcia, Sebastian and Schreier, Franz (2014) Impact of Spectroscopic Line Parameters on Carbon Monoxide Column Density Retrievals from Shortwave Infrared Nadir Observations. 2nd Stakeholder Workshop on "Traceability of Spectral Reference Line Data", 9-10 Oct 2014, Braunschweig, Germany.

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Abstract

Among the various input data required for retrieval of atmospheric state parameters from infrared remote sensing observations molecular spectroscopy line data have a central role, because the data quality is critical for the quality of the retrieval product. Here we discuss the impact of the line parameters on vertical column densities (VCD) estimated from short wave infrared nadir observations. Using BIRRA (the Beer InfraRed Retrieval Algorithm) comprising a line-by-line radiative transfer code (forward model) and a separable nonlinear least squares solver for inversion we retrieve carbon monoxide from observations of SCIAMACHY aboard Envisat. Retrievals using the two recent versions of HITRAN (2008 and 2012) and GEISA 2011 have been performed and the results are compared in terms of residual norms, molecular density scaling factors, their corresponding errors, and the final VCD product. The retrievals turn out to be quite similar for all three databases, so a definite recommendation in favor of one of these databases is difficult for the considered spectral range around 2.3mue. Nevertheless, HITRAN 2012 appears to be advantageous when evaluating the different quality criteria.

Item URL in elib:https://elib.dlr.de/91314/
Document Type:Conference or Workshop Item (Poster)
Title:Impact of Spectroscopic Line Parameters on Carbon Monoxide Column Density Retrievals from Shortwave Infrared Nadir Observations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmidt, DeniseTU Muenchen und DLR-IMFUNSPECIFIED
Gimeno Garcia, Sebastiansebastian.gimenogarcia (at) dlr.deUNSPECIFIED
Schreier, Franzfranz.schreier (at) dlr.deUNSPECIFIED
Date:9 September 2014
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Atmospheric remote sensing Molecular spectroscopy Data bases Line-by-line Infrared
Event Title:2nd Stakeholder Workshop on "Traceability of Spectral Reference Line Data"
Event Location:Braunschweig, Germany
Event Type:Workshop
Event Dates:9-10 Oct 2014
Organizer:PTB - Physikalisch-Technische Bundesanstalt
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Spektrometrische Verfahren und Konzepte der Fernerkundung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Schreier, Dr.rer.nat. Franz
Deposited On:12 Nov 2014 15:39
Last Modified:31 Jul 2019 19:48

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