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| Titel |
Total column methane for the years 2003-2009 as seen by SCIAMACHY: Trends and variability |
| VerfasserIn |
Christian Frankenberg, Ilse Aben, Peter Bergamaschi, Sander Houweling |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250044711
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| Zusammenfassung |
| We present a long-term timeseries of SCIAMACHY data, from January 2003 through March
2009, and discuss inter-annual variability and the detection of the recent trend in
methane.
In a first part, we briefly discuss the technical difficulties of retrieving a consistent
methane dataset from SCIAMACHY spectra after the end of 2005. We then focus on
time-series over key regions. Over the Sahara, where the best signal-to-noise for
SCIAMACHY can be achieved, the increase of methane in 2007 and 2008 can be
clearly observed even though it is only 10-15 ppb. In other regions, the increase
can also be observed but with somewhat more noise in observed month-to-month
variations.
In a second part, we will further discuss long-term averages on high spatial resolution,
giving indications of regional methane source regions.
In a final part, we will briefly discuss latest 4D-VAR inversion results based on
SCIAMACHY data recently published in Bergamaschi et al (JGR, 2009). |
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