极端天气 Extreme Weather

Weather has always been one of the most dynamic and complex forces shaping our planet, but now it's intensifying in varied and complex ways. 'Extreme Weather' takes us to the frontlines where few have gone. 　　Among the melting tidewater glaciers of Alaska, National Geographic Emerging Explorer Dr. Erin Pettit leads a young team of researchers into the splash zone at the face of D...