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| Titel |
How do variations in the temporal distribution of rainfall events affect ecosystem fluxes in seasonally water-limited Northern Hemisphere shrublands and forests? |
| VerfasserIn |
I. Ross, L. Misson, S. Rambal, A. Arneth, R. L. Scott, A. Carrara, A. Cescatti, L. Genesio |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 3 ; Nr. 9, no. 3 (2012-03-13), S.1007-1024 |
| Datensatznummer |
250006840
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| Publikation (Nr.) |
 copernicus.org/bg-9-1007-2012.pdf |
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| Zusammenfassung |
| Rainfall regimes became more extreme over the course of the 20th
century, characterised by fewer and larger rainfall events. Such
changes are expected to continue throughout the current century.
The effect of changes in the temporal distribution of rainfall on
ecosystem carbon fluxes is poorly understood, with most available
information coming from experimental studies of grassland
ecosystems. Here, continuous measurements of ecosystem carbon
fluxes and precipitation from the worldwide FLUXNET network of
eddy-covariance sites are exploited to investigate the effects of
differences in rainfall distribution on the carbon balance of
seasonally water-limited shrubland and forest sites. Once the
strong dependence of ecosystem fluxes on total annual rainfall
amount is accounted for, results show that sites with rainfall
distributions characterised by fewer and larger rainfall events have
significantly lower gross primary productivity, slightly lower
ecosystem respiration and consequently a smaller net ecosystem
productivity. |
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