A Spatiotemporal Analysis of Climatic Drivers for Observed Changes in Sahelian Vegetation Productivity (1982–2007)
Linear trend analysis and seasonal trend analysis are performed on gridded data of vegetation, rainfall, solar radiation flux, and air temperature, in order to examine the influence of the past three decades of climate variability and change on the Sahelian vegetation dynamics. Per-pixel correlation...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | International Journal of Geophysics |
| Online Access: | http://dx.doi.org/10.1155/2011/715321 |
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| author | Per Skougaard Kaspersen Rasmus Fensholt Silvia Huber |
| author_facet | Per Skougaard Kaspersen Rasmus Fensholt Silvia Huber |
| author_sort | Per Skougaard Kaspersen |
| collection | DOAJ |
| description | Linear trend analysis and seasonal trend analysis are performed on gridded data of vegetation, rainfall, solar radiation flux, and air temperature, in order to examine the influence of the past three decades of climate variability and change on the Sahelian vegetation dynamics. Per-pixel correlation analyses are conducted on annual and monthly data, and analyses of change in the potential climatic constraints to the natural vegetation development from 1982–2007 are performed. The results reveal two distinct periods: (a) 1982–1994 marked by large increases in vegetation productivity and rainfall and little change in average air temperatures and solar radiation and (b) 1995–2007 characterized by no distinct trends in vegetation productivity and rainfall and increase in average air temperatures and decrease in solar radiation flux. Correlations between vegetation productivity and climatic constraints were found to be statistically significant only for rainfall explaining only a moderate degree of observed NDVI variation, indicating that nonclimatic factors are also important for the Sahelian vegetation dynamics. |
| format | Article |
| id | doaj-art-d2bbeccb84ef4ebb807b24b10b6b183f |
| institution | Kabale University |
| issn | 1687-885X 1687-8868 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Geophysics |
| spelling | doaj-art-d2bbeccb84ef4ebb807b24b10b6b183f2025-08-20T03:24:07ZengWileyInternational Journal of Geophysics1687-885X1687-88682011-01-01201110.1155/2011/715321715321A Spatiotemporal Analysis of Climatic Drivers for Observed Changes in Sahelian Vegetation Productivity (1982–2007)Per Skougaard Kaspersen0Rasmus Fensholt1Silvia Huber2Department of Geography and Geology, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen, DenmarkDepartment of Geography and Geology, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen, DenmarkDepartment of Geography and Geology, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen, DenmarkLinear trend analysis and seasonal trend analysis are performed on gridded data of vegetation, rainfall, solar radiation flux, and air temperature, in order to examine the influence of the past three decades of climate variability and change on the Sahelian vegetation dynamics. Per-pixel correlation analyses are conducted on annual and monthly data, and analyses of change in the potential climatic constraints to the natural vegetation development from 1982–2007 are performed. The results reveal two distinct periods: (a) 1982–1994 marked by large increases in vegetation productivity and rainfall and little change in average air temperatures and solar radiation and (b) 1995–2007 characterized by no distinct trends in vegetation productivity and rainfall and increase in average air temperatures and decrease in solar radiation flux. Correlations between vegetation productivity and climatic constraints were found to be statistically significant only for rainfall explaining only a moderate degree of observed NDVI variation, indicating that nonclimatic factors are also important for the Sahelian vegetation dynamics.http://dx.doi.org/10.1155/2011/715321 |
| spellingShingle | Per Skougaard Kaspersen Rasmus Fensholt Silvia Huber A Spatiotemporal Analysis of Climatic Drivers for Observed Changes in Sahelian Vegetation Productivity (1982–2007) International Journal of Geophysics |
| title | A Spatiotemporal Analysis of Climatic Drivers for Observed Changes in Sahelian Vegetation Productivity (1982–2007) |
| title_full | A Spatiotemporal Analysis of Climatic Drivers for Observed Changes in Sahelian Vegetation Productivity (1982–2007) |
| title_fullStr | A Spatiotemporal Analysis of Climatic Drivers for Observed Changes in Sahelian Vegetation Productivity (1982–2007) |
| title_full_unstemmed | A Spatiotemporal Analysis of Climatic Drivers for Observed Changes in Sahelian Vegetation Productivity (1982–2007) |
| title_short | A Spatiotemporal Analysis of Climatic Drivers for Observed Changes in Sahelian Vegetation Productivity (1982–2007) |
| title_sort | spatiotemporal analysis of climatic drivers for observed changes in sahelian vegetation productivity 1982 2007 |
| url | http://dx.doi.org/10.1155/2011/715321 |
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