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| Titel |
Application of SCIAMACHY satellite methane measurements to regional studies: the case of the Greater Area of Eastern Mediterranean |
| VerfasserIn |
A. K. Georgoulias, K. A. Kourtidis, M. Buchwitz, O. Schneising, J. P. Burrows |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250022916
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| Zusammenfassung |
| The Greater Area of Eastern Mediterranean-GAEM [25oN-50oN, 5oE-55oE] is considered as
a methane background area of the northern hemisphere with limited sources. Many studies
have focused on geological formations such as mud volcanoes or geothermal systems which
abound in the area constituting a more and more established methane source on a global
scale. However, these and other studies in the region focus on specific spots rather than
extended regions which has led to a “gap” in our knowledge about methane abundances and
their spatial and temporal variability. In this work we present characteristics of methane
loading over land in GAEM using dry air columnar data (XCH4) retrieved from
SCIAMACHY satellite instrument aboard ENVISAT with WFM-DOAS version 1.0
algorithm. The data used here have been produced using modelled CO2 fields from the
CarbonTracker assimilation system instead of a constant assumed CO2 dry air column used
for the standard WFM-DOAS version 1.0 product. The CarbonTracker corrected
data are scaled by 0.01 in order to account for a 1% systematic low bias appearing
on the corrected data. We defined the annual, seasonal and monthly patterns of
methane by applying a combined spatiotemporal analysis for two separate years, 2003
and 2004. The annual mean XCH4 levels over the study area were estimated to
~1761 |
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