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Atlantic multidecadal oscillation and its manifestations in the Atlantic-European region

机译:大西洋多年代际振荡及其在大西洋-欧洲地区的表现

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摘要

We present a brief survey of the works devoted to the investigation of the Atlantic Multidecadal Oscillation, i.e., of the quasiperiodic variations of sea-surface temperature in the North Atlantic with typical time scales of 50–100 yr. This oscillation is a manifestation of the natural variability in the ocean-atmosphere system. The characteristic scale of the Atlantic Multidecadal Oscillation is determined by the speed of the meridional oceanic circulation in the North Atlantic. The analyzed oscillation affects various climatic characteristics: air temperature, river discharge in the European and North-American regions, the number and intensity of tropical cyclones in the Atlantic Ocean, and the parameters of mid-latitude cyclones and anticyclones in the Atlantic-European region. The main mechanism by which the Atlantic Multidecadal Oscillation affects the climatic characteristics of the regions neighboring with the North Atlantic is the atmospheric response to the thermal anomalies in the ocean leading to a shift of the centers of atmospheric action and to the changes in the intensity and predominant directions of propagation of atmospheric cyclones and anticyclones. By using the results of long-term instrumental observations carried out in Eastern Europe and the data array of reconstructed temperature in the Alpine region, it is shown that the Atlantic Multidecadal Oscillation is responsible for a significant part of low-frequency variations of temperature in Europe. This fact confirms the potential predictability of the regional atmospheric manifestations of the Atlantic Multidecadal Oscillation on the decadal-scale.
机译:我们简要介绍了致力于大西洋多年代际振荡研究的工作,即典型时间范围为50至100年的北大西洋海表温度的准周期性变化。这种振荡是海洋-大气系统中自然变化的体现。大西洋多年代际涛动的特征尺度取决于北大西洋子午海洋环流的速度。所分析的振荡影响各种气候特征:气温,欧洲和北美地区的河流流量,大西洋中热带气旋的数量和强度以及大西洋-欧洲地区中纬度气旋和反气旋的参数。大西洋多年代际振荡影响与北大西洋相邻区域的气候特征的主要机制是大气对海洋热异常的响应,从而导致大气作用中心的移动以及强度和强度的变化。大气旋风和反旋风的主要传播方向。通过使用在东欧进行的长期仪器观测的结果以及在高山地区重建温度的数据阵列,可以看出大西洋多年代际振荡是欧洲温度低频变化的重要部分。这一事实证实了十年尺度上大西洋多年代际涛动的区域性大气表现的潜在可预测性。

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  • 来源
    《Physical Oceanography》 |2008年第4期|P.227-236|共10页
  • 作者

    A. B. Polonskii;

  • 作者单位

    A. B. Polonskii;

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  • 原文格式 PDF
  • 正文语种 eng
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