ORBi: Sussmann Ralf - Satellite validation of column-averaged methane on global scale: ground-based data from 15 FTIR stations versus last generation ENVISAT/SCIAMACHY retrievals

Reference : Satellite validation of column-averaged methane on global scale: ground-based data from ...


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
	To cite this reference:	http://hdl.handle.net/2268/4640

Title :	Satellite validation of column-averaged methane on global scale: ground-based data from 15 FTIR stations versus last generation ENVISAT/SCIAMACHY retrievals
Language :	English
Author, co-author :	Sussmann, Ralf [ > > ]
	Foster, Frank [ > > ]
	Borsdorff, Tobias [ > > ]
	De Mazière, Martine [ > > ]
	Dils, Bart [ > > ]
	Vigouroux, Corinne [ > > ]
	Blumenstock, Thomas [ > > ]
	Buchwitz, Michael [ > > ]
	Burrows, John [ > > ]
	Demoulin, Philippe [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
	Duchatelet, Pierre [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
	Frankenberg, Christian [ > > ]
	Hannigan, James [ > > ]
	Hase, Frank [ > > ]
	Jones, Nicholas [ > > ]
	Klyft, Jon [ > > ]
	Kramer, Isabell [ > > ]
	Mahieu, Emmanuel [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
	Mellqvist, Johan [ > > ]
	Notholt, Justus [ > > ]
	Petersen, Katinka [ > > ]
	Schneising, Oliver [ > > ]
	Strandberg, Anders [ > > ]
	Strong, Kimberly [ > > ]
	Taylor, Jeff [ > > ]
	Wood, Stephen [ > > ]
Publication date :	Sep-2008
Audience :	International
Event name :	IGAC 10th International Conference
Event date :	du 7 au 12 septembre 2008
Event place (city) :	Annecy
Event country :	France
Abstract :	[en] Previous work has shown that the precision of ground-based mid-infrared (MIR) FTIR spectrometry is sufficient to detect day-to-day variability of columnar methane, while first retrievals from ENVISAT/SCIAMACHY (channel 8) satellite measurements were impacted by a significant time-dependent bias due to detector icing. This prevented insight into true methane temporal variability at that time. The goal of our updated study is to investigate the precision of the last generation (channel 6) SCIAMACHY retrievals IMAP-DOAS v49 and WFM-DOAS v1.0 in comparison to retrievals from ground-based MIR measurements of the European FTIR network. We first briefly discuss the origin and magnitude of the natural variability of columnar methane. Subsequently, our study investigates all factors which can be optimized to improve precision of ground-based MIR-FTIR retrievals of columnar methane. This includes an optimized Tikhonov-type regularization tuned in a way to minimize the diurnal variability of retrieved columnar methane. We also discuss ways to select and average individual-pixel satellite data in order to reflect true day-to-day variability and make them comparable to ground-based data.
Permalink :	http://hdl.handle.net/2268/4640

File(s) associated to this reference

Fulltext file(s):

	File	Commentary	Version	Size	Access
Restricted access	annecy_poster1.pdf		Publisher postprint	1.1 MB	Request copy

All documents in ORBi are protected by a user license.

Dspace v1.5