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首页> 外文期刊>Journal of the Meteorological Society of Japan >Multiyear La Nina Impact on Summer Temperature over Japan
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Multiyear La Nina Impact on Summer Temperature over Japan

机译:Multidear La Nina对日本夏季温度的影响

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摘要

La Nina is the negative phase of the El Nino-Southern Oscillation (ENSO) cycle. It occurs in the equatorial Pacific, and events known as multiyear La Nina often persists for more than two years. During a conventional La Nina event, the seasonal cycle of surface temperature over Japan is amplified (i.e., hotter summer and colder winter than normal years), but the influence of multiyear events on temperatures over Japan is unclear. In this study, we evaluate the teleconnection associated with multiyear La Nina events. Our research uses composite analyses of observations, reanalysis data, and a large ensemble of atmospheric general circulation model (AGCM) simulations for 1951-2010, driven by observed boundary conditions. We propose two distinct mechanisms involved in multiyear La Nina events that cause hot summers over Japan.
机译:拉尼娜是厄尔尼诺-南方涛动(ENSO)周期的负相位。它发生在赤道太平洋,称为多年拉尼娜的事件通常持续两年以上。在传统的拉尼娜现象期间,日本表面温度的季节性周期被放大(即夏季比正常年份更热,冬季比正常年份更冷),但多年事件对日本温度的影响尚不清楚。在这项研究中,我们评估了与多年拉尼娜事件相关的遥相关。我们的研究使用了对观测、再分析数据的综合分析,以及由观测边界条件驱动的1951-2010年大气环流模式(AGCM)模拟的大型集合。我们提出了导致日本夏季炎热的多年拉尼娜现象的两种不同机制。

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