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首页> 外文期刊>Geophysical Research Letters >The Roles of the Atmosphere and Ocean in Driving Arctic Warming Due to European Aerosol Reductions
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The Roles of the Atmosphere and Ocean in Driving Arctic Warming Due to European Aerosol Reductions

机译:大气和海洋在欧洲气溶胶减少导致北极变暖方面的作用

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摘要

Clean air policies can have significant impacts on climate in remote regions. Previous modeling studies have shown that the temperature response to European sulfate aerosol reductions is largest in the Arctic. Here we investigate the atmospheric and ocean roles in driving this enhanced Arctic warming using a set of fully coupled and slab-ocean simulations (specified ocean heat convergence fluxes) with the Norwegian Earth system model (NorESM), under scenarios with high and low European aerosol emissions relative to year 2000. We show that atmospheric processes drive most of the Arctic response. The ocean pathway plays a secondary role inducing small temperature changes mostly in the opposite direction of the atmospheric response. Important modulators of the temperature response patterns are changes in sea ice extent and subsequent turbulent heat flux exchange, suggesting that a proper representation of Arctic sea ice and turbulent changes is key to predicting the Arctic response to midlatitude aerosol forcing.
机译:清洁空中政策可能对偏远地区的气候产生重大影响。以前的建模研究表明,对欧洲硫酸盐气溶胶减少的温度反应是北极最大的。在这里,我们研究了在具有高低欧洲气溶胶的情况下使用挪威地球系统模型(Norem)的一套完全耦合和平板海洋模拟(指定的海洋热融合助流量)来探讨驾驶这一增强的北极变暖方面的大气和海洋角色。排放相对于2000年。我们表明大气流程驱使大部分北极反应。海洋途径在大气反应的相反方向上诱导小的温度变化的二次作用。温度响应模式的重要调节器是海冰范围和随后的湍流热通量交换的变化,表明北极海冰和湍流变化的适当表示是预测对中美气溶胶强迫的北极反应的关键。

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