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| Titel |
Climate response to Amazon forest replacement by heterogeneous crop cover |
| VerfasserIn |
A. M. Badger, P. A. Dirmeyer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 19, no. 11 ; Nr. 19, no. 11 (2015-11-16), S.4547-4557 |
| Datensatznummer |
250120850
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| Publikation (Nr.) |
 copernicus.org/hess-19-4547-2015.pdf |
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| Zusammenfassung |
| Previous modeling studies with atmospheric general circulation models and
basic land surface schemes to balance energy and water budgets have shown
that by removing the natural vegetation over the Amazon, the region's climate
becomes warmer and drier. In this study we use a fully coupled Earth system
model and replace tropical forests by a distribution of six common tropical
crops with variable planting dates, physiological parameters and irrigation.
There is still general agreement with previous studies as areal averages show
a warmer (+1.4 K) and drier (−0.35 mm day−1) climate.
Using an interactive crop model with a realistic crop distribution shows that
regions of vegetation change experience different responses dependent upon
the initial tree coverage and whether the replacement vegetation is
irrigated, with seasonal changes synchronized to the cropping season. Areas
with initial tree coverage greater than 80 % show an increase in coupling
with the atmosphere after deforestation, suggesting land use change could
heighten sensitivity to climate anomalies, while irrigation acts to dampen
coupling with the atmosphere. |
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