Arctic sea ice by helicopter (Photo: Marcel Nicolaus, AWI) About SIZONET The Seasonal Ice Zone Observing Network ( SIZONET www.sizonet.org ) samples sea ice state variables, such as sea-ice thickness [...] the western Beaufort and Chukchi Sea. Sea ice north of Barrow, Alaska (Photo: unknown) Recent results from AFIN observations Ice platelets below Weddell Sea landfast sea ice Hoppmann et al ( 2015, AOG; doi: [...] scientific projects. Sea ice thickness measurements in Atka Bay (Graphic: Mario Hoppmann, AWI) Snow depth buoy on Antarctic sea ice (Photo: Mario Hoppmann, AWI) Ponds on Arctic sea ice (Photo: Stefan Hendricks)