摘要
On the basis of the investigated data for sea ice physical processes duringthe Second Chinese National Arctic Research Expedition(CHINARE-2003)in the summer of 2003,the seaice dynamical characteristics were analyzed and the parameters describing these characteristicswere given.The new findings discovered from these parameters are:(1)The ice concentration obtainedfrom the investigation is two tenths to three tenths lower compared with that from the NOAA IceChart;and the ice thickness in the summer is 2 m less compared with the results obtained during theFirst Chinese National Arctic Research Expedition in 1999(CHINARE-1999),(2)the standarddeviation of the ice bottom fluctuation is 3.8 times that of the snow surface on the.ice sheet;(3)the maximum speed of the ice floe on which camp CHIS7 is located(CHIS7 floe)is 1300 m/h withrotation and oscillation.The rotation angle increased stepwise,the maximum being 37.8°,whilethe CHIS7 floe moved toward the north-east,and its rotation angle decreased stepwise.While theCHIS7 floe moved south-eastward.The oscillation period of CHIS7 floe is 12.45 h,which isconsistent with that of the inertial current at the same latitude,showing the contribution of theinertial current to the ice floe movement.
基金
supported by the Na-tional Natural Science Foundation of China under con-tract Nos 40233032 and 40376006
China Science and Technology Basement and Social Commonweal Special Project under contract 2003DEB5J057.
