NABOS 2023 cruise

Kodiak, AK to Tromsø, Norway

August 26–October 2

us coast guard icebreaker healy in ice

This year's expedition icebreaker is the United States Coast Guard Cutter Healy. (U.S. Coast Guard photo by Petty Officer 2nd Class Charly Hengen)

This year's 38-day scientific cruise to assess the state of the eastern Arctic Ocean is headed by Project Leader Igor Polyakov and NABOS Chief Scientist Andrey Pnyushkov, both with IARC.

This cruise happens during a time of extraordinary changes in the Arctic. The exceptional magnitude of recent high-latitude changes in the ocean, ice and atmosphere strongly suggests that these changes signify a shift to a new Arctic climate state. This expedition will provide key information about the historical transitions occurring in the Arctic Ocean, and will provide participants a unique opportunity to witness these transitions first-hand.

Embarking from Kodiak, AK, traveling through the Arctic Ocean and ending at Tromsø, Norway, scientists aboard the United States Coast Guard Cutter Healy will recover scientific sensors deployed during a 2021 cruise. They will set out new equipment to continuously record temperature, salinity and currents at different ocean depths. The team will also conduct extensive ship-based surveys, gathering water and ice samples for future chemical analysis.

NABOS’ repeated oceanographic surveys and the long-term maintenance of ocean sensors has been made possible through effective international collaboration between scientists from a wide range of institutions and scientific disciplines.

Cruise map diagram and instrumentation plan (click to enlarge)
Polar view of the cruise route (click to enlarge).

Past Cruises


2021 Cruise

In September 2021, 27 participants from the United States, Russia, Japan and Denmark embarked on a 40-day polar expedition aboard of the Russian research vessel R/V Akademik Tryoshnikov.

IARC's Igor Polyakov was chief scientist on the expedition. Other IARC team members included physical oceanographer Andrey Pnyushkov and graduate students Michael Lundberg and Dolly More.

Together with their international colleagues, they made many complex observations by recovering and deploying moorings and buoys, and through an extensive CTD (conductivity, temperature, depth) survey.

The ocean, ice and atmosphere measurements from this area of pronounced climate changes will help assess the state of the Arctic Ocean.