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| Titel |
Uncertainty in the response of transpiration to CO2 and implications for climate change |
| VerfasserIn |
Nadine Mengis, David Keller, Michael Eby, Andreas Oschlies |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250102073
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| Publikation (Nr.) |
 EGU/EGU2015-1462.pdf |
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| Zusammenfassung |
| While terrestrial precipitation is a societally highly relevant climate variable, there is little
consensus among climate models about its projected 21st century changes. The main source
of precipitable water over land is plant transpiration. Plants control transpiration by opening
and closing their stomata. The sensitivity of this process to increasing CO2 concentrations is
uncertain. To assess the impact of this uncertainty on future climate, we perform experiments
with an intermediate complexity Earth System Climate Model (UVic ESCM) for a range of
model-imposed transpiration-sensitivities to CO2. Changing the sensitivity of transpiration to
CO2 causes simulated terrestrial precipitation to change by -10 % to +27 % by
2100 under a high emission scenario. This study emphasises the importance of
an improved assessment of the dynamics of environmental impact on vegetation
to better predict future changes of the terrestrial hydrological and carbon cycle. |
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