 |
| Titel |
Hydromorphic soils easily unbalance GHG balances from forests: A focus on Europe |
| VerfasserIn |
H. F. Jungkunst, D. Grunwald, A.-C. Fender, S. Fiedler, S. Erasmi |
| Konferenz |
EGU General Assembly 2012
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250071377
|
|
|
|
|
|
| Zusammenfassung |
| In terms of Non-CO2 Greenhouse Gases (GHG), forests are usually considered to be near
neutral CO2 equivalent emitters, emitting low amounts of N2O and taking up considerable
amounts of CH4. Typically more CO2 is assimilated than returned to the atmosphere by
forests. Consequently, forests are regarded as sinks for atmospheric CO2 equivalents. This
perspective inherently goes along with the perception that forests are dryland sites,
because as wetlands they would have to be considered as CH4 sources too. It is
well known that forests can include wetlands. In this presentation, we present the
potential bias range for European bottom-up inventories of CH4, when forests and
wetlands are considered to be strict opposites in the CH4 cycle. For selected scenarios
with different proportions of wet forests on the land surface, we observed that net
methane budgets that include methane sinks and sources, approximately double (~4.6
to 6.7 Tg CH4-C instead of 2,8 Tg CH4-C) when wet forests are included. The
highest uncertainty appears to be associated with the determination of the area of
methane emitting land surfaces. Furthermore, we present similar observations at the
landscape scale and N2O was additionally adding to these unbalanced GHG budgets. |
|
|
|
|
|
|