29th Conference on Hurricanes and Tropical Meteorology


Zonal asymmetries in the African Easterly Jet

Amin K. Dezfuli, Florida State University, Tallahassee, FL; and S. E. Nicholson

The African Easterly Jet has been extensively studied in recent years by major field programs, including AMMA. It has generally been treated as a single entity, a mid-level wind maximum that varies in intensity and latitude on a daily, seasonal, and interannual basis. This is the case in the long-term mean but in individual years two cores are apparent. The two cores show markedly different patterns of variability and links to rainfall in the region. The location and intensity of the western core are strongly influenced by the Guinea highlands. The eastern core, which shows a closer relationship to rainfall variability, appears to be influenced strongly by the presence of a low-level equatorial westerly jet that develops in wet years in response to inertial instability. The presence of two cores has many implications for wave activity over West Africa.

Poster Session 1, Posters: TCs and Climate, Monsoons, HFIP, TC Formation, Extratropical Transition, Industry Applications, TC Intensity, African Climate and Weather
Tuesday, 11 May 2010, 3:30 PM-5:15 PM, Arizona Ballroom 7

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