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Performance Simulations of Spaceborne Methane Observations by Integrated-Path Differential Absorption Lidar

Kiemle, Christoph und Ehret, Gerhard (2010) Performance Simulations of Spaceborne Methane Observations by Integrated-Path Differential Absorption Lidar. 38th scientific assembly of the committee on space research, 18.-25. Juli 2010, Bremen.

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Kurzfassung

A lidar-based satellite instrument for global observations of atmospheric methane is foreseen whose expected performance and technical feasibility are currently investigated in planning phase 0/A. Methane is, after carbon dioxide, the second most important greenhouse gas, whereby its anthropogenic emissions are much more uncertain. In addition, climate change may cause an important positive feedback of yet unknown intensity by release of methane from melting permafrost soils and ocean sediments. The current observational network is not able to monitor these sources with sufficient density and accuracy: While the ground-based in-situ network is too sparse, existing passive remote sensors on spacecraft are not accurate enough. Preliminary studies show that lidar with a realistic instrument design on a LEO platform has the potential to overcome these shortcomings and to measure methane with an accuracy and spatial resolution that satisfies the requirements of the user community. The presentation will include basic issues such as the selection of suitable methane absorption wavelengths, key performance parameters of instrument and spacecraft, and an assessment of the residual bias. It will highlight critical performance parameters such as instrument noise and surface reflectivity, and list the instrument and platform characteristics needed to fulfil the user requirements.

Dokumentart:Konferenzbeitrag (Vortrag, Poster)
Titel:Performance Simulations of Spaceborne Methane Observations by Integrated-Path Differential Absorption Lidar
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Kiemle, ChristophDLR IPA
Ehret, GerhardDLR IPA
Datum:25 Juli 2010
Stichwörter:atmospheric methane, remote sensing, lidar
Veranstaltungstitel:38th scientific assembly of the committee on space research
Veranstaltungsort:Bremen
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:18.-25. Juli 2010
Veranstalter :ZARM, DLR
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben LIDAR-Forschung und -Entwicklung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Lidar
Hinterlegt von: Dr.rer.nat. Christoph Kiemle
Hinterlegt am:06 Dez 2010 17:01
Letzte Änderung:06 Dez 2010 17:01

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