A spatio-temporal analysis of climatic drivers for observed changes in Sahelian vegetation productivity 1982-2007
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A spatio-temporal analysis of climatic drivers for observed changes in Sahelian vegetation productivity 1982-2007. / Kaspersen, Per; Fensholt, Rasmus; Huber Gharib, Silvia.
In: International Journal of Geophysics, 2011, p. 1-14.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - A spatio-temporal analysis of climatic drivers for observed changes in Sahelian vegetation productivity 1982-2007
AU - Kaspersen, Per
AU - Fensholt, Rasmus
AU - Huber Gharib, Silvia
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
U2 - 10.1155/2011/715321
DO - 10.1155/2011/715321
M3 - Journal article
SP - 1
EP - 14
JO - International Journal of Geophysics
JF - International Journal of Geophysics
SN - 1687-885X
ER -
ID: 40298919