NASA kicked off a new expedition at the top of the world this week to study melting sea ice in order to learn more about Earth's changing climate. The space agency's ARISE mission (short for Arctic Radiation IceBridge Sea and Ice Experiment) is designed to monitor conditions in the Arctic during flights scheduled from now until Oct. 1 — the peak of sea ice melt in the summer, according to NASA. Recently, scientists have noticed that the Arctic is losing more of its ice each summer, and the new mission should help them study how sea ice melt is affecting the planet's climate. Although 2014 doesn't mark a record low for sea ice in the Arctic it still counts as one of the lowest years on record, according to NASA cryospheric program manager Tom Wagner.
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