Rapid and significant temperature changes at the near bottom of central Chukchi Sea in summer 2008

During the third CHINARE Arctic Expedition in summer 2008,33 days of current profile,near bottom sea water temperature and salinity data in central Chukchi Sea were collected by a mooring system(CN-1).The observed data shows that near bottom water temperature has two rapid and significant changes during the observation.CTD(Conductivity Temperature Depth) data along R-section collected in this expedition,NOAA(National Oceanic and Atmospheric Administration) AVHRR(Advanced Very High Resolution Radiometer) SST(Sea Surface Temperature) and NOAA sea surface wind data are used to analyze the rapid and significant temperature changes.The results showed that water temperature changes rapidly at not only the bottom layer but also the upper layer.The rapid temperature changes are caused by the movement of temperature front.The movement consists of two parts,northward movement and swing in the direction of north-south.The northward movement is related to climate characteristics,and the swing is related to synoptic characteristics.