The polar climate simulations(with emphasis on sea ice) in the latest version of LASG climate system model(FGOALS-g1.1) were evaluated using a variety of observational data.The results show that FGOALS- g1.1 does a reasonable job in simulating primary characteristics of the Arctic and Antarctic sea ice,including spatial distribution,seasonal variation,and decadal trend.However, some discrepancies are noteworthy.(1) FGOALS-g1.1 produces more(less) total sea ice area in the Arctic(Antarctic) as compared to th...