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Department of Meteorology, The Pennsylvania State University, University Park, Pennsylvania

UCAR Visiting Scientist, NCEP-African Desk, Camp Springs, Maryland

EAMAC School of Meteorology, Niamey, Niger

IRD-LTHE-ENSHMG, Grenoble, France

Atmospheric Sciences Program and Department of Chemistry, Howard University, Washington, D.C.

Atmospheric Sciences Program, and Department of Physics, Howard University, Washington, D.C.

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