NCC期刊刊登的评论，针对2021年11月发表两篇关于overshoot影响的评估论文

https://www.nature.com/articles/s41558-021-01229-w

 Johansson, D.J.A. The question of overshoot. Nat. Clim. Chang. 11, 1021–1022 (2021).

If we take a step back and place these studies in the broader IAM literature, one question that emerges is, why has there been such a focus on end-of-the century targets in the existing literature? Both target types, that is, end-of-century and net zero, are relevant, scientifically sound and approximately equally computationally challenging to analyse. One plausible answer relates to the focus on the end-of-century radiative forcing levels in the Representative Concentration Pathways and Shared Socioeconomic Pathways. This framework has dominated much of IAM research. Although there are many advantages to coordination between research groups, it may reduce the diversity of approaches and cause biases in the literature. Consequently, a question for the future is to ponder the benefits and risks in terms of the policy relevance of joint scenario design and coordination within the IAM community.

However, not a moment too soon, the valuable Articles by Riahi et al. and Drouet et al. provide important insights on the consequences of emission pathways without large net-negative emissions during the second half of the century. This research will be directly applicable to political discussions on near-term emission targets and their consistency with long-term temperature goals.