One of the world’s leading climate scientists, a former U.S. ambassador and a businessman/philanthropist have been selected to receive honorary doctoral degrees in May at the UW-Madison commencement ceremonies.

Scientist David Fahey, diplomat Linda Thomas-Greenfield and Liz Claiborne Inc. co-founder Jerome Chazen will be honored during the doctoral, master’s and medical professional degrees commencement on May 11 at the Kohl Center.

All three recipients are graduates of UW-Madison.

Fahey’s forte has been research in ozone depletion in the atmosphere, work that led to the Montreal Protocol, an international treaty instrumental in the phaseout of the most harmful ozone-depleting substances.

Fahey, a Madison native, received his bachelor of science in physics from UW-Madison in 1975. He’s worked for the National Oceanic and Atmospheric Administration for over 35 years, currently heading the chemical sciences division at the Earth System Research Laboratory in Boulder, Colorado.

Thomas-Greenfield served as ambassador to Liberia from 2008 to 2012, and was assistant secretary for African affairs in the Obama administration. Her foreign service career spanned 35 years, including serving as director general of the foreign service.

She earned a master’s degree in public administration from UW-Madison in 1975, and also worked toward a doctorate while in Madison. Thomas-Greenfield is now a distinguished resident fellow in African studies at the Institute for the Study of Diplomacy at Georgetown University.

Chazen, a 1948 graduate in economics, was one of the founders of Liz Claiborne Inc., which at one time was considered the largest women’s apparel company in the U.S.

An undergraduate art history course also propelled his interest in visual arts, so coupled with business success, Chazen and his wife, Simona, have been very generous to the university, providing the lead gift for the new Chazen Museum of Art that opened on campus in 2011.

Chazen now is chairman of Chazen Capital Partners, a private investment firm he founded.

Bill Novak is a general assignment reporter for the Wisconsin State Journal.