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| Titel |
Inverse modeling of European CH4 emissions 2001-2006 |
| VerfasserIn |
Peter Bergamaschi, Maarten Krol, Jan Fokke Meirink, Frank Dentener, Arjo Segers, John van Aardenne, Suvi Monni, Alex A. Vermeulen, Martina Schmidt, Michel Ramonet |
| 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 |
250036827
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| Zusammenfassung |
| European CH4 emissions are estimated for the period 2001-2006 using a four-dimensional
variational (4DVAR) inverse modeling system, based on the atmospheric zoom model TM5.
Continuous observations are used from various European monitoring stations, complemented
by European and global flask samples from the NOAA / ESRL network. The available
observations provide mainly information on the emissions from Northwest Europe (NWE),
including the UK, Ireland, the BENELUX countries, France and Germany. The inverse
modeling estimates for the total anthropogenic emissions from NWE are 21% higher
compared to the EDGAR emission inventory and 40% higher compared to values reported to
UNFCCC. Assuming overall uncertainties on the order of 30% both for the bottom-up and
top-down estimates, however, these estimates are considered to be still consistent with each
other.
Sensitivity studies showed some dependence of the derived spatial emission patterns on
the set of atmospheric monitoring stations used, but the total emissions for the NWE
countries appear to be relatively robust. While the standard inversions include a priori
information on the spatial and temporal emission patterns from bottom-up inventories, a
further sensitivity inversion without this a priori information results in very similar country
totals, demonstrating that the available observations provide significant information on the
emissions from the NWE countries largely independent from bottom-up inventories. |
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