Drought-tolerant maize (corn) research, Kenya, August 2010. Photo from Creative Commons by Anne Wangalachi/CIMMYT/flickr
Jan. 28, USGS PR Via Eurekalert: "The increased frequency of drought observed in eastern Africa over the last 20 years is likely to continue as long as global temperatures continue to rise, according to new research published in Climate Dynamics. (link to full study below) This poses increased risk to the estimated 17.5 million people in the Greater Horn of Africa who currently face potential food shortages..."
"..."Global temperatures are predicted to continue increasing, and we anticipate that average precipitation totals in Kenya and Ethiopia will continue decreasing or remain below the historical average," said USGS scientist Chris Funk. "The decreased rainfall in eastern Africa is most pronounced in the March to June season, when substantial rainfall usually occurs. Although drought is one reason for food shortages, it is exacerbated by stagnating agricultural development and continued population growth."
"As the globe has warmed over the last century, the Indian Ocean has warmed especially fast. The resulting warmer air and increased humidity over the Indian Ocean produce more frequent rainfall in that region. The air then rises, loses its moisture during rainfall, and then flows westward and descends over Africa, causing drought conditions in Ethiopia and Kenya...."
Study: (Open Access) Climate Dynamics: A westward extension of the warm pool intensifies the walker circulation, drying eastern Africa
From Study Abstract: "...This trend toward drought contrasts with projections of increased rainfall in eastern Africa and more 'El Nino-like' conditions globally by the Intergovernmental Panel on Climate Change. Increased Indian Ocean SSTs appear likely to continue to strongly modulate the Warm Pool circulation, reducing precipitation in eastern Africa, regardless of whether the projected trend in ENSO is realized. These results have important food security implications, informing agricultural development, environmental conservation, and water resource planning."
UC Santa Barbara PR: More frequent drought likely in East Africa
Famine Early Warning Systems Network
CIMMYT: Drought Tolerant Maize for Africa
Change in March-June rain in Ethiopia and Kenya from 1979-2009. From study by Park Williams and Chris Funk, link above.
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