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Precipitation controls Sahel greening trend Thomas Hickler,1

Summary: Precipitation controls Sahel greening trend
Thomas Hickler,1
Lars Eklundh,1
Jonathan W. Seaquist,2
Benjamin Smith,1
Jonas Ardo¨,1
Lennart Olsson,3
Martin T. Sykes,1
and Martin Sjo¨stro¨m1
Received 11 August 2005; revised 6 October 2005; accepted 11 October 2005; published 12 November 2005.
[1] The Sahel region has been identified as a ``hot spot'' of
global environmental change, but understanding of the roles
of different climatic and anthropogenic forcing factors
driving change in the region is incomplete. We show that a
process-based ecosystem model driven by climatic and
atmospheric CO2 data alone closely reproduces the satellite-
observed greening trend of the Sahel vegetation and its
interannual variability between 1982 and 1998. Changes in
precipitation were identified as the primary driver of the
aggregated simulated vegetation changes. According to the


Source: Ardö, Jonas - Department of Earth and Ecosystem Sciences, Lunds Universitet


Collections: Environmental Sciences and Ecology; Geosciences