H2O Windows and CO2 Radiator Fins: A Clear‐Sky Explanation for the Peak in Equilibrium Climate Sensitivity
H2O Windows and CO2 Radiator Fins: A Clear‐Sky Explanation for the Peak in Equilibrium Climate Sensitivity
复制标题
H2O 窗户和 CO2 散热器翅片:对平衡气候敏感性峰值的晴空解释
DOI:
10.1029/2020gl089609
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发表时间:
2021
影响因子:
5.2
通讯作者:
N. Jeevanjee
中科院分区:
文献类型:
--
作者:
J. Seeley;N. Jeevanjee
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 ∼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‐dominated 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.
DOI:
10.1016/j.jqsrt.2013.07.002
发表时间:
2013-11-01
影响因子:
2.3
作者:
Rothman, L. S.;Gordon, I. E.;Wagner, G.
通讯作者:
Wagner, G.
影响因子:
8.9
作者:
Ingram W
通讯作者:
Ingram W
影响因子:
3.1
作者:
Jeevanjee, Nadir;Fueglistaler, Stephan
通讯作者:
Fueglistaler, Stephan