Under the global warming, the influence of increased CO₂ on regional climate change is driven by two main effects: CO₂ direct radiation and oceanic warming. Based on the outputs of CMIP5 (phase 5 of the Coupled Model Intercomparison Project), the present study found that CO₂ direct radiation and uniform oceanic warming are mainly responsible for the heat source (HS) enhancement led by increased CO₂ during June–September over the Tibetan Plateau (TP). As CO₂ increases, the resulting uniform sea surface warming induces atmospheric warming and increased atmospheric moisture over the TP, which locally enhances the latent heating (LH). In addition, the uniform sea surface warming narrows the land-sea thermal contrast between the Asian continent and the Indo-Pacific and reduces the ascending motion of the air over the TP. This reduction of ascending motion is offsetted by the effect of CO₂ direct radiation, which enhances the thermal contrast and the ascending motion. The combined effect of the two causes a generally mild change in ascending motion. Evaporation intensification led by uniform sea surface warming partly contributes to the LH increase. Thus, the changes in LH lead to the enhancement of the TP HS. Additionally, the net radiation of the atmosphere over the TP slightly increases and partly hinders the HS increase, which is mainly associated with the effect of uniform sea surface warming. The leading intermodel spread of the TP HS features an overall positive/negative deviation pattern relative to the multi-model ensemble (MME) mean response caused by the LH diversity, which stems from the uncertainties of uniform sea surface warming and the corresponding temperature response over the TP among the models.

在全球变暖的情况下，CO ₂增加对区域气候变化的影响由两个主要影响驱动：CO ₂直接辐射和海洋变暖。根据CMIP5（耦合模型比较项目的第5阶段）的输出，本研究发现，CO ₂直接辐射和均匀的海洋变暖是6月至9月期间由CO ₂增加引起的热源（HS）增强的主要原因。在青藏高原（TP）。作为CO ₂TP的增加会导致均匀的海面变暖引起大气变暖，并增加TP上的大气湿度，从而局部增强潜热（LH）。此外，均匀的海面变暖缩小了亚洲大陆与印度太平洋之间的陆海热反差，并减少了TP上方空气的上升运动。上升运动的这种减少被CO ₂的影响抵消了直接辐射，可增强热对比度和上升运动。两者的综合作用会导致上升运动产生一般的轻微变化。均匀的海面变暖导致的蒸发加剧部分地导致了LH的增加。因此，LH的变化导致TP HS的增强。另外，TP上大气的净辐射略有增加，部分阻碍了HS的增加，这主要与海平面均匀变暖的影响有关。TP HS的领先模型间扩展具有相对于LH多样性引起的多模型集合（MME）平均响应的总体正/负偏差模式，这是由于海面均匀变暖的不确定性和相应的温度响应所致。模型之间的TP。