维多利亚模式对厄尔尼诺/南方涛动与冬季欧洲地表气温之间不确定性联系的调节作用

IF 4.5 2区 地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES
Kai Ji , Ruiqiang Ding , Linlu Mei
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引用次数: 0

摘要

厄尔尼诺-南方涛动(ENSO)对太平洋和北美气候的影响十分广泛,但欧洲ENSO与冬季地表气温(SAT)之间的关系却不太明确。本研究基于再分析数据和数值试验,研究了春季维多利亚模式(VM)对翌年冬季 ENSO 与 SAT 之间微弱联系的调节作用。结果表明,在维多利亚模式正(负)阶段,厄尔尼诺/南方涛动与欧洲中部冬季 SAT 之间的联系具有显著的正(负)相关性。进一步的分析表明,与厄尔尼诺/南方涛动相关的海面温度(SST)异常在 VM 调节中发挥了重要作用。在正的 VM 阶段,厄尔尼诺/南方涛动与北太平洋西部的海面温度变暖模式相结合,诱发了东大西洋远缘连接模式,从而加强了异常暖平流,导致欧洲中部出现正的 SAT 异常。相反,在负的 VM 阶段,厄尔尼诺/南方涛动可通过热带北太平洋的中间海温异常触发负的北大西洋涛动模式,有利于形成负的欧洲中部 SAT 异常。通过使用大气模型进行强迫实验,进一步验证了 VM 对厄尔尼诺/南方涛动与冬季欧洲中部 SAT 之间联系的显著调节作用。这为厄尔尼诺/南方涛动能够预测欧洲中部冬季 SAT 带来了希望,同时考虑到之前春季 VM 的阶段。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The modulation effect of the Victoria mode on the uncertainty connection between ENSO and winter European surface air temperature
While El Niño-Southern Oscillation (ENSO) has widespread impacts on the climate around the Pacific and North America, the relationship between ENSO and winter surface air temperature (SAT) in Europe is less well established. This study investigates the modulation effects of the spring Victoria mode (VM) on the weak ENSO–SAT connection in the following winter based on reanalysis data and numerical experiments. It is shown that the connection between ENSO and the winter SAT in central Europe has a significant and positive (negative) correlation during the positive (negative) VM phase. Further analysis shows that the sea surface temperature (SST) anomalies associated with ENSO play an important role in the VM modulation. For the positive VM phase, ENSO combined with the SST warming mode in the western North Pacific induces the East Atlantic teleconnection pattern, which strengthens the anomalous warm advection and leads to the positive SAT anomalies in central Europe. In contrast, for the negative VM phase, ENSO could trigger a negative North Atlantic Oscillation pattern through intermediate SST anomalies in the tropical North Pacific, favoring the formation of the negative central European SAT anomalies. The remarkable modulation effect of the VM on the connection between ENSO and winter central European SAT is further verified through forced experiments using an atmospheric model. This could provide hope that ENSO can make predictions for the winter SAT in central Europe, considering the phase of the preceding spring VM.
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来源期刊
Atmospheric Research
Atmospheric Research 地学-气象与大气科学
CiteScore
9.40
自引率
10.90%
发文量
460
审稿时长
47 days
期刊介绍: The journal publishes scientific papers (research papers, review articles, letters and notes) dealing with the part of the atmosphere where meteorological events occur. Attention is given to all processes extending from the earth surface to the tropopause, but special emphasis continues to be devoted to the physics of clouds, mesoscale meteorology and air pollution, i.e. atmospheric aerosols; microphysical processes; cloud dynamics and thermodynamics; numerical simulation, climatology, climate change and weather modification.
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