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首页> 外文期刊>Geophysical Research Letters >The Role of the Tropically Excited Arctic Warming Mechanism on the Warm Arctic Cold Continent Surface Air Temperature Trend Pattern
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The Role of the Tropically Excited Arctic Warming Mechanism on the Warm Arctic Cold Continent Surface Air Temperature Trend Pattern

机译:热兴奋的北极加热机制对温暖北极冷仑面积空气温度趋势模式的作用

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摘要

The December-February surface air temperature (SAT) trend is examined for all consecutive 20-year time periods between 1979 and 2017, from which a transition from a cold-Arctic-warm-continent toward a warm-Arctic-cold-continent trend pattern is evident. This transition is accompanied by a consistent transition in the sea level pressure trend pattern that supports warm air advection over the Arctic and cold air advection over the continents. The regression of the detrended December-February-average SAT onto a detrended index defined to quantify the east-west gradient of tropical Pacific sea surface temperature is characterized by a warm-Arctic-cold-continent pattern much like the SAT trend pattern observed in recent decades. A decadal timescale warming of the western tropical Pacific water has increased the east-west gradient of tropical Pacific sea surface temperature, thus contributing to the observed extratropical SAT trend transition.
机译:在1979年至2017年间连续20年期间审查了12月至2月地表空气温度(SAT)趋势,从冷漠 - 温暖的大陆转向温暖的冷漠的趋势模式 很明显。 这种转变伴随着海平面压力趋势模式的一致过渡,支持对北极和冷空气平流的温暖空气的平流。 转向12月 - 2月平均水平坐落在定义的贬低指数上,以量化热带太平洋海面温度的东西梯度,其特点是热北极冷 - 洲模式,就像最近观察到的SAT趋势模式一样 几十年。 西部热带太平洋水平的十二次少年温暖,增加了热带太平洋海洋表面温度的东西梯度,从而促进了观察到的卓越态趋势过渡。

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