Earth science

Kathryn Sullivan

Alumna on Time's '100 Most Influential People' list

Former astronaut Kathryn Sullivan '73 now leads NOAA as under secretary of commerce for oceans and atmosphere.
Greenland river

Geographers create 'easy button' to calculate river flows from space

The frustrated attempts of a graduate student to quantify the amount of water draining from Greenland's melting ice sheet led him to devise a new way to measure river flows using satellite images.

Small window of time for volcano eruption

Mount Hood study: Liquid magma, necessary for eruption, is uncommon.