Jo Ann Joselyn

Jo Ann Cram Joselyn is an astrogeophysicist. She was the first woman to receive a doctorate from the University of Colorado's astrogeophysics program, and has advocated for the importance of women's leadership in the sciences.

Education
Joselyn received her Ph.D. from the University of Colorado Boulder in Boulder, Colorado, US in 1978, M.S. from the University of Colorado, Boulder, 1967, Engineering, and B.S. from the University of Colorado, Boulder, 1965, Applied Mathematics. Her thesis at CU Boulder was titled "Elemental Composition and Ionization State of the Solar Atmosphere and Solar Wind."

Career
From 1968 to 1999, she worked at the National Oceanic and Atmospheric Administration (NOAA) as a space scientist and space weather forecaster. Her work focused on documenting and predicting space weather, particularly solar flares, sunspots, and their impact on communications. Joselyn served as the Secretary General of the International Association of Geomagnetism and Aeronomy (IAGA) from 1997 to 1999, and as Secretary General of the International Union of Geodesy and Geophysics (IUGG) from 1999 to 2007. To date, she is the only woman who has held that role. She was inducted into the Colorado Women's Hall of Fame in 2002.