Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL089609 |
H2O windows and CO2 radiator fins: a clear‐sky explanation for the peak in ECS | |
Jacob T. Seeley; Nadir Jeevanjee | |
2020-12-11 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | Recent explorations of the state‐dependence of Earth's equilibrium climate sensitivity (ECS) have revealed a pronounced peak in ECS at a surface temperature of approximately 310 K. This ECS peak has been observed in models spanning the model hierarchy, suggesting a robust physical source. Here we propose an explanation for this ECS peak using a novel spectrally‐resolved decomposition of clear‐sky longwave feedbacks. We show that the interplay between spectral feedbacks in H2O‐ and CO2‐dominated portions of the longwave spectrum, along with moist‐adiabatic amplification of upper‐tropospheric warming, conspire to produce a minimum in the feedback parameter, and a corresponding peak in ECS, at a surface temperature of 310 K. Mechanism denial tests highlight three key ingredients for the ECS peak: 1) H2O continuum absorption to quickly close spectral windows at high surface temperature; 2) moist‐adiabatic tropospheric temperatures to enhance upper‐tropospheric warming; and 3) energetically‐consistent increases of CO2 with surface temperature. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/308213 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Jacob T. Seeley,Nadir Jeevanjee. H2O windows and CO2 radiator fins: a clear‐sky explanation for the peak in ECS[J]. Geophysical Research Letters,2020. |
APA | Jacob T. Seeley,&Nadir Jeevanjee.(2020).H2O windows and CO2 radiator fins: a clear‐sky explanation for the peak in ECS.Geophysical Research Letters. |
MLA | Jacob T. Seeley,et al."H2O windows and CO2 radiator fins: a clear‐sky explanation for the peak in ECS".Geophysical Research Letters (2020). |
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