Explaining Forcing Efficacy With Pattern Effect and State Dependence
Explaining Forcing Efficacy With Pattern Effect and State Dependence
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DOI：
10.1029/2022gl101700
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发表时间：
2023-02
影响因子：
5.2
通讯作者：
C. Zhou;M. Wang;Mikuláš Zelinka;Y. Liu;Y. Dong;K. Armour
中科院分区：
文献类型：
--
作者：
C. Zhou;M. Wang;Mikuláš Zelinka;Y. Liu;Y. Dong;K. Armour
响应于单位辐射强迫的全球表面温度变化的幅度取决于强迫因子的类型和幅度--这个概念称为“强迫功效”。然而，强迫功效背后的机制仍不清楚。在这项研究中，我们使用CESM 1进行了一组模拟，以计算10种不同强迫因子的功效，这些强迫因子是根据固定SST有效辐射强迫定义的，然后使用绿色函数方法来表明，每种强迫功效可以在很大程度上根据与强迫因子引起的不同表面温度模式相关的辐射反馈来理解（模式效应）。我们还量化了反馈对全球平均地表温度异常的状态依赖性如何影响强迫效应。结果表明，模式效应和状态依赖相结合可以很好地重构强迫效能。
The magnitude of global surface temperature change in response to unit radiative forcing depends on the type and magnitude of forcing agent—a concept known as a “forcing efficacy.” However, the mechanisms behind the forcing efficacy are still unclear. In this study, we perform a set of simulations using CESM1 to calculate the efficacy of 10 different forcing agents defined in terms of fixed‐SST effective radiative forcing, and then use a Green's function approach to show that each forcing efficacy can be largely understood in terms of the radiative feedbacks associated with the different surface temperature patterns induced by the forcing agents (a pattern effect). We also quantify how the state dependence of feedbacks on global mean surface temperature anomalies impacts forcing efficacies. The results show that the forcing efficacy can be well reconstructed with a combination of pattern effect and state dependence.