Pettit's research is primarily focused on glacial dynamics and exploring the interactions within the ice-ocean-earth system. Pettit is a
National Geographic Emerging Explorer who innovated applying acoustic research with hydrophones to calving and melting glaciers reaching the ocean, to examine ice shelf disintegration and the ice-ocean boundary. Her work has been recognized by numerous high-profile sources, including
EARTH magazine, and
National Geographic, and she was invited to present a
TEDWomen talk, on her investigations focused on "listening" to glaciers. Her research on glacier sounds extends to how the underwater noise affects marine animals. She also founded Inspiring Girls Expeditions, a series of interdisciplinary wilderness science programs that teach high school girls about
glaciology,
oceanography, ecology, and mountaineering. The first program, Girls on Ice, started in
Washington in 1999, with Pettit taking five girls to the
South Cascade Glacier. During the program, adolescent girls learn
mountaineering skills, how to use
GPS for glacier measurement and how to calculate the velocity of streams. == Awards and honors ==