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Carbon Monoxide Total Column Retrievals from Sentinel-5P Short-Wave Infrared Nadir Measurements

Hochstaffl, Philipp and Schreier, Franz (2019) Carbon Monoxide Total Column Retrievals from Sentinel-5P Short-Wave Infrared Nadir Measurements. 2019 Living Planet Symposium, 13.-17. May 2019, Milan, Italy.

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We presented a comprehensive assessment of carbon monoxide (CO) total column retrievals from Sentinel-5P (S5P) Short-Wave Infrared (SWIR) observations. The Level1-2 processing is performed using the Beer Infrared Retrieval (BIRRA) which performs a least squares fit of Earth's radiance (essentially transmission) to retrieve the molecular column densities (essentially density scaling factors) along with some auxiliary parameters (reflectivity, etc.) [Gimeno Garcia et al., AMT 2011]. It has been developed at DLR since about 2005 and its computational core modules have been integrated in the operational SCIAMACHY (Scanning Imaging Absorption Spectrometer for Atmospheric Chartography) Level1b-2 processor to retrieve CO from channel 8 (2.3 µm) and methane from channel 6 (1.6 µm) nadir observations. In the framework of DLR's SCIAMACHY activities BIRRA CO and CH4 columns were thoroughly examined in several intercomparisons [e.g. Hochstaffl et al., Remote Sens. 2018]. The latest version of the BIRRA prototype is featuring new enhancements in the GARLIC (Generic Atmospheric Radiation Line-by-line Infrared Code) [Schreier et al., JQSRT 2014] forward model. It utilizes, among other things, additional line shape parameters given in the latest spectroscopic databases such as the SEOM-IAS (Scientific Exploitation of Operational Missions-Improved Atmospheric Spectroscopy), a project that intended the improvement of spectroscopic information in preparation for the S5P mission. An updated framework is providing appropriate auxiliary information (e.g. a priori atmospheric profiles of pressure, temperature, and concentrations of interfering species, cloud information, topography, the latest molecular spectroscopy data, etc.). Finally, the results were assessed by a thorough comparison with other data products. More specifically, an estimation of the quality of our CO product in view of the accuracy requirements defined in the mission preparation phase (i.e. 15% for CO) is given using TCCON (Total Carbon Column Observing Network) ground-based observations.

Item URL in elib:https://elib.dlr.de/128821/
Document Type:Conference or Workshop Item (Poster)
Title:Carbon Monoxide Total Column Retrievals from Sentinel-5P Short-Wave Infrared Nadir Measurements
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hochstaffl, PhilippPhilipp.Hochstaffl (at) dlr.dehttps://orcid.org/0000-0001-9537-3050
Schreier, FranzFranz.Schreier (at) dlr.dehttps://orcid.org/0000-0001-7196-6599
Date:May 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Carbon monoxide, Sentinel-5P, TROPOMI, Line-by-line radiative transfer, Level1-2 retrieval
Event Title:2019 Living Planet Symposium
Event Location:Milan, Italy
Event Type:international Conference
Event Dates:13.-17. May 2019
Organizer:European Space Agency (ESA)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):Vorhaben Spectroscopic Methods in Remote Sensing (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Hochstaffl, Philipp
Deposited On:16 Dec 2019 15:30
Last Modified:16 Dec 2019 15:30

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