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首页> 外文期刊>Geophysical Research Letters >Midlatitude atmospheric responses to Arctic sensible heat flux anomalies in Community Climate Model, Version 4
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Midlatitude atmospheric responses to Arctic sensible heat flux anomalies in Community Climate Model, Version 4

机译:第4版社区气候模型中的北纬大气对北极显热通量异常的响应

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摘要

Possible linkages between Arctic sea ice loss and midlatitude weather are strongly debated in the literature. We analyze a coupled model simulation to assess the possibility of Arctic ice variability forcing a midlatitude response, ensuring consistency between atmosphere, ocean, and ice components. We work with weekly running mean daily sensible heat fluxes with the self-organizing map technique to identify Arctic sensible heat flux anomaly patterns and the associated atmospheric response, without the need of metrics to define the Arctic forcing or measure the midlatitude response. We find that low-level warm anomalies during autumn can build planetary wave patterns that propagate downstream into the midlatitudes, creating robust surface cold anomalies in the eastern United States.
机译:文献中对北极海冰损失与中纬度天气之间的可能联系进行了激烈的辩论。我们分析了一个耦合模型仿真,以评估北极冰层变化强迫中纬度响应的可能性,从而确保大气,海洋和冰层成分之间的一致性。我们使用自组织映射技术处理每周运行的平均日感热通量,以识别北极的感热通量异常模式和相关的大气响应,而无需定义北极强迫或测量中纬度响应的指标。我们发现,秋季的低层暖异常可以建立行星波模式,并向下游传播到中纬度地区,从而在美国东部形成强大的地表冷异常。

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