Ph.D candidate Ludda Ludwig, left, and graduate student Kelsey Blake from the University of Victoria in British Columbia, get to work after being dropped off from a helicopter at their research site near the headwaters of the Kuparuk River. Ludwig's study is focused on the movement of water and nutrients from Arctic hillslopes to streams. The pair took off from the Toolik Field Station research facility, located about 370 miles north of Fairbanks on Alaska's North Slope.

ArcticResearchsummerToolik Field Stationgraduate studentfemalehorizontaloutsidehelicopterwaterKuparuk River