Tag: sediment cores

African Savanna
January 18th, 2017|

Green Sahara’s Ancient Rainfall Regime Revealed

Rainfall patterns in the Sahara during the six-thousand-year “Green Sahara” period have been revealed by analyzing marine sediments.

A new study projects that much of Ethiopia, Somalia and Djibouti in the Horn of Africa will grow drier as global warming progresses. In northern Ethiopia, herders often already struggle to make a living. (Brian Kahn/IRI)
October 9th, 2015|

Horn of Africa Drying in Sync with Climate

A new study finds that the Horn of Africa is drying at a rate that is both unusual in the context of the past 2,000 years and in step with human-influenced warming.

Changing pollen levels in the sediment of Lake Elsinore indicate that a series of mega-droughts gripped the region thousands of years ago. Photo by Jim Sneddon/CC-BY-2.0
September 22nd, 2015|

Ancient Pollen Points to Mega-Droughts in California Thousands of Years Ago

Ancient pollen is providing new insights into historic droughts in Southern California, including how a series of mega-droughts that changed the ecological landscape.