10th Anniversary of AMMA

AMMA logo depicting thunderstorms over Africa

AMMA logo depicting thunderstorms over Africa

Starting in July of 2006, the African Monsoon Multidisciplinary Analysis (AMMA) project ran a major field campaign, gathering weather and ocean data from western Africa and nearby waters.  The main purpose was to document the inter-seasonal and inter-annual variability of the African Monsoon, where hot, dry air from the Sahara and warm, moist air for the Gulf of Guinea interact.  An ancillary project, NASA’s AMMA (NAMMA) also examined how fluctuations in the monsoon affected the formation of African Easterly Waves and the potential formation of hurricanes.

NAMMA supplemented the intensified land observations over the African continent with flights of NASA’s DC-8 over the adjacent waters.  Eleven flights were made into seven waves, several of which formed into hurricanes.  The flights also examined the Saharan Air Layer, a major factor in tropical Atlantic weather.

References:

A list of scholarly papers from AMMA

The Saharan Air Layer and the Fate of African Easterly Waves—NASA’s AMMA Field Study of Tropical Cyclogenesis

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Bulletin of the American Meteorological Society

August 2009, Vol. 90, No. 8

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Weather and Forecasting

December 2009, Vol. 24, No. 6

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Journal of the Atmospheric Sciences

April 2010, Vol. 67, No. 4

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Weather and Forecasting

June 2010, Vol. 25, No. 3

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Journal of the Atmospheric Sciences

October 2009, Vol. 66, No. 10

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Journal of the Atmospheric Sciences

January 2010, Vol. 67, No. 1