Yale Environment 360: A team of U.S. researchers recently deployed a suite of technologies in the Arctic tundra that they say will provide a better understanding of the carbon contained in permafrost soils and how much is likely to be released as the planet warms. At an experimental plot near Barrow, Alaska, scientists are using several techniques, from ground-penetrating radar systems dragged on sleds to airborne instruments that measure micro-topography, to better understand how different layers of permafrost are interrelated...