A tireless scientific expedition is currently encamped across a huge stretch of Arctic pack ice. The daytime temperature is just above freezing. Regardless, the team sends data day and night to a string of labs around the world. The Marginal Ice Zone (MIZ) program is the biggest experiment of its kind in the Arctic Ocean. A host of specially designed instruments work in concert to build a picture of how the ice responds to changes in the surrounding conditions. In a few weeks, these will be joined by four "sea gliders"--rocket-shaped underwater vehicles which will operate autonomously for four months, traveling around under the ice shelf measuring water turbulence and dissolved oxygen levels.
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