Paper on changes to the intensity of tropical waves during the hurricane season published in the Journal of Climate

African easterly waves (AEWs) are areas of low air pressure that move westward across North Africa and into the Atlantic Ocean. AEWs can cause intense thunderstorms, and, once over the warm waters of the Atlantic Ocean, they may become tropical cyclones that might affect the Caribbean and North America. In summer, many AEWs form in, …

Paper on easterly waves in the Eastern Pacific that can form into tropical cyclones published in The Journal of the Atmospheric Sciences

“Easterly waves” are areas of low air pressure in the tropics that move westward and may become tropical cyclones. The most well-known type of easterly wave is the “African easterly wave,” which moves from West Africa north of the equator into the Atlantic Ocean and sometimes into the Pacific. Although almost all Northeast Pacific tropical …

45th Anniversary of African Easterly Wave paper

In the January 1972 issue of the Journal of Atmospheric Science, Robert W. Burpee (future director of HRD) published a paper explaining the mechanism by which African Easterly Waves (AEW) formed.  Using five years of upper-air data from above Africa, he demonstrated that airflow over the Ethiopian highlands created instabilities in the wind stream that …