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| Titel |
ENSO effects on primary productivity in Southern Atacama desert |
| VerfasserIn |
F. A. Squeo, Y. Tracol, D. López, J. R. Gutiérrez, A. M. Cordova, J. R. Ehleringer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: 1st Alexander von Humboldt International Conference ; Nr. 6 (2006-03-03), S.273-277 |
| Datensatznummer |
250003268
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| Publikation (Nr.) |
 copernicus.org/adgeo-6-273-2006.pdf |
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| Zusammenfassung |
| In the winter-rain southern Atacama Desert of the Coquimbo Region of Chile,
El Niño - Southern Oscillation (ENSO) events modulate primary
productivity. In this region, there are important changes in water
availability between La Niña (dry) and El Niño (rainy) years. Using
inter-annual comparisons of LANDSAT images from 30° to 31° S
latitude, we observed changes in primary productivity between dry and rainy
years at the regional level. There were also significant, negative
correlations between productivity and elevation, with changes occurring
first at low elevation during rainy years. The limiting factors to dryland
vegetation primary productivity is different in regard to elevation. Rain
during an El Niño year is the main factor that explains the increase in
primary productivity at low elevation, while lower temperatures reduce and
delay the net primary productivity at mid elevation. |
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