DOI: 10.1007/s00382-014-2138-0
Scopus记录号: 2-s2.0-84939873329
论文题名: Using aquaplanets to understand the robust responses of comprehensive climate models to forcing
作者: Medeiros B. ; Stevens B. ; Bony S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 44, 期: 2017-07-08 起始页码: 1957
结束页码: 1977
语种: 英语
英文关键词: Aquaplanet
; Climate change
; Climate feedbacks
; Climate models
; Cloud radiative effect
; Tropospheric adjustment
英文摘要: Idealized climate change experiments using fixed sea-surface temperature are investigated to determine whether zonally symmetric aquaplanet configurations are useful for understanding climate feedbacks in more realistic configurations. The aquaplanets capture many of the robust responses of the large-scale circulation and hydrologic cycle to both warming the sea-surface temperature and quadrupling atmospheric CO2 . The cloud response to both perturbations varies across models in both Earth-like and aquaplanet configurations, and this spread arises primarily from regions of large-scale subsidence. Most models produce a consistent cloud change across the subsidence regimes, and the feedback in trade-wind cumulus regions dominates the tropical response. It is shown that these trade-wind regions have similar cloud feedback in Earth-like and aquaplanet warming experiments. The tropical average cloud feedback of the Earth-like experiment is captured by five of eight aquaplanets, and the three outliers are investigated to understand the discrepancy. In two models, the discrepancy is due to warming induced dissipation of stratocumulus decks in the Earth-like configuration which are not represented in the aquaplanet. One model shows a circulation response in the aquaplanet experiment accompanied by a cloud response that differs from the Earth-like configuration. Quadrupling atmospheric CO2 in aquaplanets produces slightly greater adjusted forcing than in Earth-like configurations, showing that land-surface effects dampen the adjusted forcing. The analysis demonstrates how aquaplanets, as part of a model hierarchy, help elucidate robust aspects of climate change and develop understanding of the processes underlying them. © 2014, The Author(s). 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54154
Appears in Collections: 过去全球变化的重建
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作者单位: National Center for Atmospheric Research, PO BOX 3000, Boulder, CO, United States; Max Planck Institute for Meteorology, Bundesstr. 53, Hamburg, Germany; Laboratoire de Météorologie Dynamique, IPSL, CNRS, Paris, France
Recommended Citation:
Medeiros B.,Stevens B.,Bony S.. Using aquaplanets to understand the robust responses of comprehensive climate models to forcing[J]. Climate Dynamics,2015-01-01,44(2017-07-08)