资源环境科技发展态势分析平台

Recent research shows that 90% of the net global ocean heat gain during 2005鈥?015 was confined to the southern hemisphere with little corresponding heat gain in the northern hemisphere ocean. We propose that this heating pattern of the ocean is driven by anthropogenic climate change and an asymmetric climate variation between the two hemispheres. This asymmetric variation is found in the pre-industrial control simulations from 11 climate models. While both layers (0鈥?00鈥塵 and 700鈥?000鈥塵) experience steady anthropogenic warming, the 0鈥?00鈥塵 layer experiences large internal variability, which primarily drives the observed hemispheric asymmetry of global ocean heat gain in 0鈥?000鈥塵 layer. We infer that the rate of global ocean warming is consistent with the climate simulations for this period. However, the observed hemispheric asymmetry in heat gain can be explained by the Earth鈥檚 internal climate variability without invoking alternate hypotheses, such as asymmetric aerosol loading.