 |
| Titel |
Terrestrial ecosystems response to future changes in climate and atmospheric CO2 concentration |
| VerfasserIn |
V. K. Arora, G. J. Boer |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 15 ; Nr. 11, no. 15 (2014-08-08), S.4157-4171 |
| Datensatznummer |
250117540
|
| Publikation (Nr.) |
 copernicus.org/bg-11-4157-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| The response of the terrestrial carbon cycle to future changes in climate and
atmospheric CO2 is assessed by analysing simulation results for the
2006–2100 period made with the second generation Canadian Earth system model
(CanESM2) for the RCP 2.6, RCP 4.5 and RCP 8.5 climate change scenarios. Our
interest is in the extent to which global terrestrial carbon pools and sinks,
in particular those of the Amazonian region, are vulnerable to the adverse
effects of climate change. CanESM2 results indicate that land remains an
overall sink of atmospheric carbon for the 2006–2100 period. The net carbon
uptake by land in response to changes in climate and atmospheric CO2 is
close to 20, 80 and 140 Pg C for the RCP 2.6, 4.5 and 8.5 scenarios,
respectively. The latitudinal structure of future atmosphere–land CO2
flux remains similar to that observed for the historical period with northern
mid- to high-latitude regions gaining carbon from the atmosphere while the
tropics remain either carbon neutral or a modest source of atmospheric carbon
depending on scenario. These changes occur in conjunction with simulated
precipitation and soil moisture increases over northern mid- and
high-latitude land regions and precipitation and soil moisture decreases over
the South American continent in all scenarios. Compared to other regions of
the globe, which are either carbon sinks or near neutral, the Amazonian
region is simulated to be a net source of carbon during the 21st century.
Moreover, and unexpectedly, the rate of carbon loss to the atmosphere from
the Amazonian region is largely independent of the differences between the
three scenarios considered. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|