| DOI: | 10.1002/2016GL067679
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| 论文题名: | Positive low cloud and dust feedbacks amplify tropical North Atlantic Multidecadal Oscillation |
| 作者: | Yuan T.; Oreopoulos L.; Zelinka M.; Yu H.; Norris J.R.; Chin M.; Platnick S.; Meyer K.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9375
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| EISSN: | 1944-9106
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| 出版年: | 2016
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| 卷: | 43, 期:3 | | 起始页码: | 1349
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| 结束页码: | 1356
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| 语种: | 英语
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| 英文关键词: | AMO
; climate model
; cloud feedback
; coupled dynamics
; dust feedback
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| Scopus关键词: | Atmospheric temperature
; Dust
; Feedback
; Oceanography
; Surface waters
; Tropics
; Wind
; Atlantic multidecadal oscillations
; Climate model simulations
; Cloud feedbacks
; Coupled dynamics
; Critical wind speed
; Realistic simulation
; Sea surface temperature anomalies
; Tropical atlantic
; Climate models
; air-sea interaction
; Atlantic Multidecadal Oscillation
; climate feedback
; climate modeling
; climate oscillation
; cloud
; coupling
; dust
; general circulation model
; oceanic current
; sea surface temperature
; trade wind
; wind velocity
; Atlantic Ocean
; Atlantic Ocean (North)
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| 英文摘要: | The Atlantic Multidecadal Oscillation (AMO) is characterized by a horseshoe pattern of sea surface temperature (SST) anomalies and has a wide range of climatic impacts. While the tropical arm of AMO is responsible for many of these impacts, it is either too weak or completely absent in many climate model simulations. Here we show, using both observational and model evidence, that the radiative effect of positive low cloud and dust feedbacks is strong enough to generate the tropical arm of AMO, with the low cloud feedback more dominant. The feedbacks can be understood in a consistent dynamical framework: weakened tropical trade wind speed in response to a warm middle latitude SST anomaly reduces dust loading and low cloud fraction over the tropical Atlantic, which warms the tropical North Atlantic SST. Together they contribute to the appearance of the tropical arm of AMO. Most current climate models miss both the critical wind speed response and two positive feedbacks though realistic simulations of them may be essential for many climatic studies related to the AMO. © 2016. The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959387760&doi=10.1002%2f2016GL067679&partnerID=40&md5=f48ac0d7378d525442313ff11a864124
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/10338
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Catonsville, MD, United States
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| Recommended Citation: | |
Yuan T.,Oreopoulos L.,Zelinka M.,et al. Positive low cloud and dust feedbacks amplify tropical North Atlantic Multidecadal Oscillation[J]. Geophysical Research Letters,2016-01-01,43(3).
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