Rainfall & Climate in the Horn of Africa
(Photo courtesy of OxFam East Africa)
Jessica E. Tierney, Jason E. Smerdon, Kevin J. Anchukaitis and Richard Seager Nature, 493, 389-392.
Multidecadal variability in East African rainfall is an important but poorly understood component of the climate of the region. Here we use paleoclimate records of relative moisture balance from the last millennium and general circulation model simulations to provide perspective on multidecadal variability in East Africa and insight on the mechanisms that drive it.
Jessica E. Tierney & Peter B. deMenocal, Science, 342, 843-846.
The timing and abruptness of the initiation and termination of the Early Holocene African Humid Period are a subject of ongoing debate. Here we provide proxy evidence from the Horn of Africa region that documents abrupt transitions into and out of the African Humid Period in northeast Africa. Similar and generally synchronous abrupt transitions at other East African sites suggest that rapid shifts in hydroclimate are a regionally coherent feature. Our analysis suggests that the termination of the African Humid Period in the Horn of Africa occurred within centuries, underscoring the non-linearity of the region's hydroclimate.