The dipole pattern of summer precipitation over the Tibetan Plateau (TP) during 1961–2014 is evaluated based on observations and 18 models provided by the Coupled Model Intercomparison Project Phase 6. Of the 18 models, 10 can capture the opposite variation characteristics in the south and north TP. Observational data reveals that the south–north seasaw of TP summer precipitation is essentially driven by a Rossby wave propagating from the Western Europe to East Asia, which is associated with North Atlantic oscillation (NAO). The models successfully simulated the dipole pattern that is closely related to the reproduction of the NAO–TP relationship. Further analysis demonstrates that the reliable simulations of horizontal dynamic processes of moisture transport, which is linked to the NAO–TP relationship, highly contributes to their success in reproducing the dipolar pattern of TP summer precipitation. While unrealistic local vertical circulation and evaporation simulation lead to the failed reproductions. These findings provide significant information for model development and future climate change projections.

基于观测值和耦合模型比较项目第6阶段提供的18个模型，对1961-2014年青藏高原（TP）夏季降水的偶极格局进行了评估。在18个模型中，有10个可以捕捉到南部相反的变化特征。和北部TP。观测数据表明，TP夏季降水的南北海锯基本上是由从西欧向东亚传播的罗斯比波驱动的，这与北大西洋振荡（NAO）有关。这些模型成功地模拟了与NAO-TP关系的再现密切相关的偶极子模式。进一步的分析表明，与NAO-TP关系相关的可靠的水平水分运移动态模拟，它们成功地重现了TP夏季降水的偶极模式，对此做出了巨大贡献。不切实际的局部垂直循环和蒸发模拟导致复制失败。这些发现为模型开发和未来气候变化预测提供了重要信息。