The Hidden Ocean

Hidden beneath Arctic ice is a world few have ever seen. Take the icy plunge with a team of ice-loving scientists.

US Coast Guard Cutter HEALY

A dive tender monitors the line connected to ice divers studying creatures living on the underside of the Arctic Sea ice .

Bow of an Icebreaker

Special ships called ‘icebreakers’ are needed to access some areas of the ice-covered Arctic Ocean .

Measuring Ice Core Temperatures

Marine biologist Mette Kaufman measures the temperature of a recently-drilled ice core . Variations in temperature at different points of the ice core provide information about the living conditions of the various organisms...

Listening for Bowhead Whales

Hoping to hear bowhead whales , NOAA marine mammal scientist Sue Moore listens to real-time sounds from an underwater hydrophone.

Launching a Multinet

Scientists use a multinet to collect Arctic zooplankton samples from different depth layers in the water column .

Launching a Box Corer

To learn more about the creatures living on the Arctic seafloor, scientists use a variety of tools including this box corer.

Diving Beneath the Ice

The world beneath the Arctic ice is magical, but cold. Divers have to tolerate temperatures of 30 degrees Fahrenheit (about -2° Celsius.) To stay warm they wear thermal undergarments and use special gear called dry suits ...

Descending Through the Ice

Ice divers Katrin Iken (left) and Elizabeth Siddon are about to descend through a hole in the Arctic ice and into the frigid world below.

Counting Creatures

Ice divers use a quadrat to study the density of creatures living on the underside of Arctic ice floes. A quadrat is a standardized square used to take sample measurements that allow researchers to get an accurate estimate...

Diving Deeper

Scientists use remotely operated vehicles , ROVs, equipped with collection devices and cameras to aid in deep-sea ocean exploration in the Arctic and in other regions of the world. It is unoccupied and is maneuvered by a...