The application of Polar-ARV in the fourth Chinese National Arctic Expedition

In August of 2010 Polar-ARV participated in the 4^th Chinese National Arctic Expedition(CHINARE)for the second time. It accomplished the observation of 17 horizontal sections under sea ice at latitude of about 87 degrees north. During Polar-ARV working under the sea ice, the seawater temperature, salinity, pressure, sea ice thickness and ice optical properties, as well as the video of sea ice were Synchronously collected with accurate position information, According to these scientific data scientists can do further analysis and research for the change of sea ice. This paper describes the application of Polar-ARV in the 4^th CHINARE and the results of Arctic test.