The fast receding sea-ice extent in the Arctic Ocean (AO) has implications for the global climate. Changes in the sea-ice dynamics cause variations in ocean physical and biogeochemical parameters. An ensemble of simulations from the ‘Community Earth System Model’ (CESM2-WACCM), part of the sixth phase of the Coupled Model Intercomparison Project (CMIP6), is utilized for years 1850–2100. The regional differences in sea-ice parameters are highlighted over seven marginal seas in the AO. The maximum difference in sea-ice heat content (~4.5 × 10⁸ J m⁻²) is obtained in the East Siberian Sea, central AO, and along the east coast of Greenland in March. The sea surface temperature has higher temporal variability in the Barents Sea, Beaufort Sea and Chukchi Sea in September, which confines the Fram Strait and the Barents Sea regions in March. In September, the sea-ice concentration shows large (>30%) temporal variations in the East Siberian Sea, Laptev Sea, Beaufort Sea, and along the coast of Greenland. Sea surface temperature is projected to increase by 6 °C over the Chukchi Sea by the year 2100. In response to sea-ice melting, a decline in sea-ice thickness and reduction of sea surface salinity up to 2.5 psu is observed in the future relative to the present in some parts of the AO. The advection of Atlantic water and its wind-driven mixing causes maximum winter-time warming in the Svalbard region over the eastern Greenland Sea. The future projections indicate the ice-free surface during September in the AO by the year 2050.

北冰洋 (AO) 快速消退的海冰范围对全球气候产生影响。海冰动力学的变化导致海洋物理和生物地球化学参数的变化。来自“共同体地球系统模型”(CESM2-WACCM) 的模拟集合是耦合模型比对项目 (CMIP6) 第六阶段的一部分，在 1850-2100 年间被使用。AO 中的七个边缘海突出了海冰参数的区域差异。海冰热含量的最大差异 (~4.5 × 10 ⁸  J m ^-2) 于 3 月在东西伯利亚海、AO 中部和格陵兰岛东海岸获得。9 月份巴伦支海、波弗特海和楚科奇海的海面温度具有较高的时间变化，3 月份限定了弗拉姆海峡和巴伦支海区域。9 月，东西伯利亚海、拉普捷夫海、波弗特海和格陵兰沿岸的海冰浓度显示出较大 (>30%) 的时间变化。预计到 2100 年，楚科奇海的海面温度将增加 6°C。为了应对海冰融化，未来将观察到海冰厚度下降和海面盐度降低至 2.5 psu相对于当前 AO 的某些部分。大西洋水的平流及其风力驱动的混合导致格陵兰海东部斯瓦尔巴地区的冬季最大变暖。未来的预测表明到 2050 年 9 月 AO 的无冰表面。