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首页> 外文期刊>Climate dynamics >Synergistic effect of SST anomalies in the North Pacific and North Atlantic on summer surface air temperature over the Mongolian Plateau
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Synergistic effect of SST anomalies in the North Pacific and North Atlantic on summer surface air temperature over the Mongolian Plateau

机译：SST异常在北太平洋和北大西洋对蒙古高原夏季地表空气温度的协同作用

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摘要

The impact of sea surface temperature anomalies (SSTAs) over the North Pacific (32 degrees-45 degrees N, 140 degrees E-150 degrees W) and North Atlantic (north: 52 degrees-68 degrees N, 60 degrees-20 degrees W; south: 0 degrees-30 degrees N, 100 degrees-40 degrees W) on the summer surface air temperature (SAT) over the Mongolian Plateau (MP) is studied using NCEP/NCAR and Climatic Research Unit (CRU) reanalysis data. The results show that the circumglobal teleconnection (CGT) wave train related to the SSTAs in the North Atlantic propagates along with the westerly jet, resulting in a geopotential height anomaly at 200 hPa that favors an SAT anomalies (SATAs) on the MP. In addition, an anticyclonic (cyclonic) circulation anomaly with the characteristics of an atmospheric ultralong wave at 200 hPa over the Eurasia-Pacific region associated with the SSTAs in the North Pacific is also responsible for the positive (negative) SATAs on the MP. The results further reveal that the SSTAs in the North Pacific and the northern North Atlantic act synergistically on the SATAs on the MP. If there are strongly positive (negative) SSTAs in the North Pacific and the northern North Atlantic at the same time, the probability of a strongly positive (negative) SATAs on the MP is 67% (100%) for the research period of this paper. However, if the strongly positive (negative) SSTAs only appear in the North Pacific or the northern North Atlantic, the probability of a strongly positive (negative) SATAs on the MP is less than 34% (31%). The synergism of the SSTAs in the North Pacific and the northern North Atlantic enhances Rossby wave energy in Eurasia, with more Rossby wave energy spreading to the MP that in turn causes the circulation anomaly on the MP. Meanwhile, baroclinic conditions at 850 hPa north of the North Pacific, the northern and southern North Atlantic favor a northward shift of the westerly jet that guides the Rossby wave downstream so that the circulation anomaly that produces the SATAs on the MP is located in the mid-high latitudes.
机译：海面温度异常（SSTA）对北太平洋（32度-45度N，140度E-150度W）和北大西洋（北：52度-68度N，60度-20度;南：0度-30度N，100度-40度W）在夏季表面空气温度（SAT）上使用NCEP / NCAR和气候研究单位（CRU）再分析数据进行蒙古平台（MP）。结果表明，北大西洋中的SSTA相关的恒定遥控器（CGT）波动系随着西方喷射，导致200 HPA的地理调谐高度异常，在MP上有利于SAT异常（SATAS）。此外，在与北太地区的SSTA相关联的欧亚太平洋地区200 HPA的欧洲太平洋地区有大气超龙波的反气旋（循环）循环异常也负责MP上的积极（负）SATA。结果进一步揭示了北太平洋和北部大西洋北部的SSTA在MP上的SATAS协同上协同作用。如果北太平洋和北部大西洋有强烈的（负）SSTA同时，MP上强烈积极（负）SATA的概率为67％（100％），用于本文的研究期间。但是，如果强烈的（负）SSTA仅出现在北太平洋或北部大西洋，MP上强烈正（负）SATA的可能性小于34％（31％）。 SSTA在北太平洋和北部大西洋中的SSTA协同作用增强了欧亚大陆的罗斯比波能量，具有更多罗斯比波能量向MP传播，反过来导致MP上的循环异常。同时，北太平洋北部850 HPA，北部和南部大西洋的曲尾铝条件有利于西方喷气式飞机的向北转动，指导罗斯比波下游，以便在MP中生产SATA的循环异常，位于中期 - 高纬度。

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  • 来源
    《Climate dynamics》 |2021年第6期|1449-1465|共17页
  • 作者

    An Xiadong; Sheng Lifang; Li Jianping;

  • 作者单位

    Ocean Univ China Dept Marine Meteorol Coll Ocean & Atmospher Sci Qingdao 266100 Peoples R China;

    Ocean Univ China Dept Marine Meteorol Coll Ocean & Atmospher Sci Qingdao 266100 Peoples R China|Ocean Univ China Ocean Atmosphere Interact & Climate Lab Key Lab Phys Oceanog Qingdao 266100 Peoples R China;

    Ocean Univ China Frontiers Sci Ctr Deep Ocean Multispheres & Earth Key Lab Phys Oceanog Inst Adv Ocean Studies Qingdao 266100 Peoples R China|Pilot Qingdao Natl Lab Marine Sci & Technol Lab Ocean Dynam & Climate Qingdao 266237 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Surface air temperature; Mongolian Plateau; Circumglobal teleconnection; Sea surface temperature;

    机译：表面空气温度;蒙古高原;Circumglobal Teleconnection;海表面温度;

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