Southern giant petrels Macronectes giganteus as indicators of ocean surface currents

Abstract

A Southern Giant Petrel Macronectes giganteus was satellite tracked during a long foraging trip. While at rest on the sea surface, the giant petrel drifted in a counterclockwise corkscrew pattern that is characteristic of an inertial oscillation in the Southern Ocean. This note demonstrates that tracking data from resting seabirds can be used as passive drifters to estimate ocean surface currents in a notoriously stormy environment where data near the air-sea interface are difficult to obtain.