Autonomous Real-time Marine Mammal Detections

Woods Hole Oceanographic Institution

Chukchi Sea, Arctic, Summer 2020

Study objectives

A Slocum G2 glider was deployed in the Chukchi Sea off the northwest coast of Alaska on September 12, 2020 to study the occurrence of several species of marine mammals, including fin, bowhead, and beluga whales, as well as bearded seals and walrus. This project is designed to examine relationships between marine mammal distribution and oceanographic conditions monitored by the glider. Results shown on this page have been reviewed by an experienced analyst (Kate Stafford) and represent locations and times where the near real-time passive acoustic detection data provide evidence of species occurrence.

Principal Investigators: Kate Stafford (University of Washington), Seth Danielson (University of Alaska Fairbanks), and Mark Baumgartner (WHOI)

Analyst: Kate Stafford (University of Washington)

Platform location:

Analyst-reviewed species occurrence maps:

Daily analyst review:

DateFin whaleBeluga whaleKiller whaleBearded sealBowhead whaleWalrusAir gunOther

Possibly detected
Not detected

Time series:

Diel plot:

Oceanographic observations:

Links to detailed information:

Automated detection data

DMON/LFDCS Diagnostics

Platform diagnostics


Please email Mark Baumgartner at For a general desciption of the detection system and the autonomous platforms, visit


The Slocum glider was expertly prepared by Hank Statscewich (UAF). Deployment was made possible by Rebecca Woodgate (UW), chief scientist of the deployment cruise on the M/V Norseman II. At sea assistance was provided by the captain and crew of the M/V Norseman II. Support for the development of the Arctic marine mammal call library as well as the preparation and operation of the glider in 2020 was provided by Alaska Ocean Observing System. The glider was procured in 2016 with support from the North Pacific Research Board. Support for the development and testing of the DMON/LFDCS was provided by the Office of Naval Research, and additional support for integration and testing was provided by the NOAA National Marine Fisheries Service Advanced Sampling Technologies Working Group in collaboration with the Northeast Fisheries Science Center's Passive Acoustics Research Group (leader: Sofie Van Parijs).