The impact of sea surface temperature anomalies (SSTAs) over the North Pacific (32°–45° N, 140° E–150° W) and North Atlantic (north: 52°–68° N, 60°–20° W; south: 0°–30° N, 100°–40° 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.

北太平洋（北纬32°至45°，北纬140°至150°）和北大西洋（北纬52°至68°N，北纬60°至20°）海面温度异常（SSTA）的影响；南：使用NCEP / NCAR和气候研究单位（CRU）的再分析数据，研究了蒙古高原（MP）夏季表面气温（SAT）的0°–30°N，100°–40°W。结果表明，与北大西洋的SSTA相关的环全球遥传（CGT）波列与西风急流一起传播，导致200 hPa的地势高度异常，有利于MP上的SAT异常（SATA）。此外，一个反气旋（气旋）环流异常，其特征是与北太平洋的SSTA相关的欧亚太平洋地区200 hPa处的大气超长波特征，也是MP上正（负）SATA的原因。结果进一步表明，北太平洋和北大西洋北部的SSTA协同作用于MP上的SATA。如果在北太平洋和北大西洋北部同时存在强烈的正（负）SSTA，则在本研究期间，MP上的强烈的正（负）SATA概率为67％（100％） 。但是，如果强烈正（负）SSTA仅出现在北太平洋或北大西洋北部，则MP上强烈正（负）SATA的可能性小于34％（31％）。北太平洋和北大西洋北部的SSTA的协同作用增强了欧亚大陆的Rossby波能，更多的Rossby波能传播到MP上，进而导致MP上的环流异常。同时，北太平洋以北，北大西洋的北部和南部850 hPa的斜压条件有利于西风急流向北移动，从而引导罗斯比波向下游移动，从而使在MP上产生SATA的环流异常位于–高纬度。