Axel Schweiger, principal scientist and chair at the University of Washington's Polar Science Center, and Roger Andersen, senior mathematician at the University of Washington's Polar Science Center, review air sample data as it is received from a Dropsond

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Axel Schweiger, principal scientist and chair at the University of Washington's Polar Science Center, and Roger Andersen, senior mathematician at the University of Washington's Polar Science Center, review air sample data as it is received from a Dropsonde sensor aboard a Coast Guard HC-130 Hercules airplane above the Beaufort Sea north of Alaska, Tuesday, July 16, 2013. The Dropsonde sensor collects temperature, humidity and wind readings as it travels from 10,000 feet to sea level.

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