Physics
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3612701g&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 12, CiteID L12701
Physics
Global Change: Regional Climate Change, Hydrology: Drought, Hydrology: Extreme Events, Hydrology: Hydroclimatology, Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408)
Scientific paper
Recurrence times for extreme drought events in the African Sahel are estimated using a classical peaks-over-threshold model. Results, which are computed for both mean seasonal rainfall and fractional area in drought, suggest that the distribution of dry extremes after about 1970 is statistically distinct from that of preceding years. This finding throws into relief the critical role played by attribution of causes, and the necessity of improving our understanding of the physical processes driving precipitation variability in the Sahel.
Giannini Alessandra
Greene Arthur M.
Zebiak Stephen E.
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