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US Antarctic Program divers Rob Robbins, Brenda Konar and Amanda Kelley collect a calibration sample for a Sea-FET instrument, an autonomous pH oceanographic sensor located at Cape Evans, McMurdo Sound, Antarctica, for a project studying ocean acidification. Research from this project, led by Gretchen Hofmann at the University of California, Santa Barbara, resulted in the first-ever continuous time-series pH data from the Southern Ocean, setting a benchmark for monitoring future changes to this pristine marine ecosystem.
This photo was taken at a depth of about 70-80 feet.Image credit: Steve Rupp, NSF / Source: U.S. Antarctic Photo Library
