DOI: 10.1007/s00382-017-3548-6
Scopus记录号: 2-s2.0-85013757357
论文题名: The role of sea-ice albedo in the climate of slowly rotating aquaplanets
作者: Salameh J. ; Popp M. ; Marotzke J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-07-08 起始页码: 2395
结束页码: 2410
语种: 英语
英文关键词: Albedo
; Aquaplanet
; Habitable zone
; Non-synchronous
; Rotation period
英文摘要: We investigate the influence of the rotation period (P r o t) on the mean climate of an aquaplanet, with a focus on the role of sea-ice albedo. We perform aquaplanet simulations with the atmospheric general circulation model ECHAM6 for various rotation periods from one Earth-day to 365 Earth-days in which case the planet is synchronously rotating. The global-mean surface temperature decreases with increasing P r o t and sea ice expands equatorwards. The cooling of the mean climate with increasing P r o t is caused partly by the high surface albedo of sea ice on the dayside and partly by the high albedo of the deep convective clouds over the substellar region. The cooling caused by these deep convective clouds is weak for non-synchronous rotations compared to synchronous rotation. Sensitivity simulations with the sea-ice model switched off show that the global-mean surface temperature is up to 27 K higher than in our main simulations with sea ice and thus highlight the large influence of sea ice on the climate. We present the first estimates of the influence of the rotation period on the transition of an Earth-like climate to global glaciation. Our results suggest that global glaciation of planets with synchronous rotation occurs at substantially lower incoming solar irradiation than for planets with slow but non-synchronous rotation. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109357
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Max Planck Institute for Meteorology, Hamburg, Germany; International Max Planck Research School on Earth System Modelling, Hamburg, Germany; Princeton University, Princeton, NJ, United States
Recommended Citation:
Salameh J.,Popp M.,Marotzke J.. The role of sea-ice albedo in the climate of slowly rotating aquaplanets[J]. Climate Dynamics,2018-01-01,50(2018-07-08)