期刊
GEOPHYSICAL RESEARCH LETTERS
卷 44, 期 14, 页码 7455-7463出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017GL074372
关键词
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资金
- Tamaki Foundation
- NSF [AGS-1455071]
- Div Atmospheric & Geospace Sciences
- Directorate For Geosciences [1455071] Funding Source: National Science Foundation
Radiative feedbacks robustly vary over time in transient warming simulations. Published studies offer two explanations: (i) evolving patterns of ocean heat uptake (OHU) or radiative forcing give rise to OHU or forcing efficacies and (ii) evolving patterns of surface temperature change. This study seeks to determine whether these explanations are indeed distinct. Using an idealized framework of an aquaplanet atmosphere-only model, we show that radiative feedbacks depend on the pattern of climate forcing. Yet the same feedbacks arise when the temperature pattern induced by that climate forcing is prescribed in the absence of any forcing. These findings suggest the perspective that feedbacks are influenced by efficacies of forcing and OHU is equivalent to the perspective that feedbacks are dependent on the temperature patterns induced by those forcings. Prescribed surface temperature simulations are thus valuable for studying the temporal evolution of radiative feedbacks.
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