The equilibrium climate sensitivity (ECS) in the latest version of CNRM climate model, CNRM-CM6-1, and in its high-resolution counterpart, CNRM-CM6-1-HR, is significantly larger than in the previous version (CNRM-CM5.1). The traceability of this climate sensitivity change is investigated using coupled ocean-atmosphere model climate change simulations. These simulations show that the increase in ECS is the result of changes in the atmospheric component. A particular attention is paid to the method used to decompose the equilibrium temperature response difference, by using a linearized decomposition of the individual radiative agents diagnosed by a radiative kernel technique. The climate sensitivity increase is primarily due to the cloud radiative responses, with a predominant contribution of the tropical longwave response (including both feedback and forcing adjustment) and a significant contribution of the extratropical and tropical shortwave feedback changes. A series of stand-alone atmosphere experiments is carried out to quantify the contributions of each atmospheric development to this difference between CNRM-CM5.1 and CNRM-CM6-1. The change of the convection scheme appears to play an important role in driving the cloud changes, with a large effect on the tropical longwave cloud feedback change.

中文翻译：

---

在 CNRM 气候模型中跟踪气候敏感性的变化

最新版本的 CNRM 气候模型 CNRM-CM6-1 及其高分辨率对应版本 CNRM-CM6-1-HR 中的平衡气候敏感性 (ECS) 明显大于先前版本 (CNRM-CM5 .1）。使用耦合的海洋-大气模型气候变化模拟研究了这种气候敏感性变化的可追溯性。这些模拟表明，ECS 的增加是大气成分变化的结果。特别注意用于分解平衡温度响应差异的方法，方法是使用由辐射核技术诊断的单个辐射剂的线性分解。气候敏感性的增加主要是由于云辐射响应，热带长波响应（包括反馈和强迫调整）的主要贡献和温带和热带短波反馈变化的重要贡献。进行了一系列独立的大气实验，以量化每个大气发展对 CNRM-CM5.1 和 CNRM-CM6-1 之间的这种差异的贡献。对流方案的变化似乎在驱动云变化中起着重要作用，对热带长波云反馈变化的影响很大。