西伯利亚的高度(嘘) 在最近的年里从 1970 年代经历了衰落到 1990 年代和恢复。在全球温暖下面的 SH 的进化是不清楚的。在这研究, 41 联合了模型 Intercomparison 工程阶段 5 (CMIP5 ) 气候模型以他们在 19812005 期间在第 19 和第 20 个世纪和 SH 的空间模式模仿 SH 的时间的进化的能力被评估。结果证明 12 个模型能为 18722005 捕获 SH 中心紧张(SHCI ) 的时间的进化。在从第二十世纪分析的 SHCI 和从 12 个模型的多模型整体(MME ) 的模仿的 SHCI 之间的线性关联系数在年度、内部年度的规模上是 0.3 (在 99% 信心水平上面) 。在十、多十的时间规模上, MME 也捕获显著减小(在 19812000 和 18811900 时期之间) 并且恢复(在 19912005 期间) SH 紧张。最后, SH 的未来进化在 +4.5 和 +8.5 W m -2 下面用 12 个模型的 MME 被调查代表集中小径(RCP ) 情形(RCP4.5 和 RCP8.5 ) 。这被显示出 SHCI,类似于在第 20 世纪的 SHCI,没在全球温暖下面在第 21 世纪有重要长期的趋势(RCP8.5 情形) 。在第 21 世纪(20812100 ) 的结束, SH 在第 20 世纪(19812000 ) 的结束比 SH 显示出更强壮的 interannual 可变性。增加的 interannual 可变性多半在第 21 世纪的结束在 midlatitude 欧亚大陆上在冬季空气温度赞成增加的 interannual 可变性。
The Siberian high(SH)experienced a decline from the 1970s to 1990s and a recovery in recent years.The evolution of the SH under global warming is unclear.In this study,41 Coupled Model Intercomparison Project Phase 5(CMIP5)climate models are evaluated in terms of their ability to simulate the temporal evolution of the SH in the 19th and 20th centuries and the spatial pattern of the SH during 1981–2005.The results show that 12models can capture the temporal evolution of the SH center intensity(SHCI)for 1872–2005.The linear correlation coefficient between the SHCI from the Twentieth Century Reanalysis and the simulated SHCI from the multi-model ensemble(MME)of the 12 models is 0.3 on annual and inter-annual scales(above the 99%confidence level).On decadal and multi-decadal time scales,the MME also captures the pronounced reduction(between 1981–2000and 1881–1900 period)and the recovery(during1991–2005)of the SH intensity.Finally,the future evolution of the SH is investigated using the MME of the 12models under the+4.5 and+8.5 W m^-2 Representative Concentration Pathway(RCP)scenarios(RCP4.5 and RCP8.5).It is shown that the SHCI,similar to the SHCI in the 20th century,has no significant long-term trend in the 21st century under global warming(RCP8.5 scenario).At the end of 21st century(2081–2100),the SH shows stronger interannual variability than the SH at the end of20th century(1981–2000).The increased interannual variability likely favors the increased interannual variability in winter air temperature over midlatitude Eurasia at the end of 21st century.