 |
| Titel |
Climate-mediated spatiotemporal variability in terrestrial productivity across Europe |
| VerfasserIn |
X. Wu, F. Babst, P. Ciais, D. Frank, M. Reichstein, M. Wattenbach, C. Zang, M. D. Mahecha |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 11 ; Nr. 11, no. 11 (2014-06-11), S.3057-3068 |
| Datensatznummer |
250117453
|
| Publikation (Nr.) |
 copernicus.org/bg-11-3057-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| Quantifying the interannual variability (IAV) of the terrestrial ecosystem
productivity and its sensitivity to climate is crucial for improving carbon
budget predictions. In this context it is necessary to disentangle the
influence of climate from impacts of other mechanisms underlying the
spatiotemporal patterns of IAV of the ecosystem productivity. In this study
we investigated the spatiotemporal patterns of IAV of historical
observations of European crop yields in tandem with a set of climate
variables. We further evaluated if relevant remote-sensing retrievals of
NDVI (normalized difference vegetation index) and FAPAR (fraction of absorbed photosynthetically active radiation) depict a similar behaviour. Our results reveal distinct
spatial patterns in the IAV of the analysed proxies linked to terrestrial
productivity. In particular, we find higher IAV in water-limited regions of
Europe (Mediterranean and temperate continental Europe) compared to other
regions in both crop yield and remote-sensing observations. Our results
further indicate that variations in the water balance during the active
growing season exert a more pronounced and direct effect than variations of
temperature on explaining the spatial patterns in IAV of productivity-related variables in temperate Europe. Overall, we observe a temporally
increasing trend in the IAV of terrestrial productivity and an increasing
sensitivity of productivity to water availability in dry regions of Europe
during the 1975–2009 period. In the same regions, a simultaneous increase in the IAV of
water availability was detected. These findings suggest intricate responses
of carbon fluxes to climate variability in Europe and that the IAV of
terrestrial productivity has become potentially more sensitive to changes in
water availability in the dry regions in Europe. The changing sensitivity of
terrestrial productivity accompanied by the changing IAV of climate is
expected to impact carbon stocks and the net carbon balance of European
ecosystems. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|