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| Titel |
The European budget of isoprene and monoterpene emissions and its change since the Last Glacial Maximum |
| VerfasserIn |
G. Schurgers, T. Hickler, P. A. Miller, A. Arneth |
| 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 |
250022987
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| Zusammenfassung |
| Volatile organic compounds emitted from the terrestrial biosphere (BVOC) play an important
role in atmospheric processes. BVOC species are oxidized in the atmosphere and influence
levels of ozone. BVOCs that are less volatile, as well as their oxidation products, can be
important for the formation of biogenic aerosol. Both effects influence the earth’s radiation
balance and thus climate, but in polluted atmospheres they can affect human health as
well.
In this study we present a novel simulation of the changes in BVOC emissions (isoprene,
monoterpenes) from the Last Glacial Maximum (LGM) to the present as derived from the
dynamic changes in species distribution of the main European tree species. These simulations
were performed with a dynamic vegetation model, driven with climate anomalies from model
simulations and reconstructed CO2 concentrations.
We can quantify three main driving factors for the changes in emissions of isoprene and
monoterpenes since the LGM: (1) The changes in climate, with temperature changes as most
important factor affecting plant physiology and terpenoid production, (2) a change in
species distribution related to the changes in climate, causing local shifts in emission
characteristics of the vegetation, and (3) a change in CO2 concentration, causing
opposing effects on the availability of different substrates for terpenoid production.
Particularly the effect of atmospheric CO2 concentration is uncertain, and sensitivity
simulations showed a strong dependence of the emissions on the application of a CO2
inhibition. |
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