DOI: 10.1016/j.quascirev.2016.06.017
论文题名: Teleconnected ocean forcing of Western North American droughts and pluvials during the last millennium
作者: Routson C.C. ; Woodhouse C.A. ; Overpeck J.T. ; Betancourt J.L. ; McKay N.P.
刊名: Quaternary Science Reviews
出版年: 2016
卷: 146 起始页码: 238
结束页码: 250
语种: 英语
英文关键词: Climate change
; Drought
; Multi-proxy
; Pluvial
; Synthesis
; Western North America
Scopus关键词: Atmospheric temperature
; Climate change
; Complex networks
; Drought
; Repair
; Surface waters
; Synthesis (chemical)
; Hydroclimatic variability
; Long term change
; Medieval Climate Anomaly (MCA)
; Multi proxies
; Pluvial
; Sea surface temperature (SST)
; Teleconnection patterns
; Western North America
; Oceanography
; atmosphere-ocean coupling
; climate forcing
; climate variation
; decadal variation
; drought
; Medieval Warm Period
; proxy climate record
; reconstruction
; sea surface temperature
; teleconnection
; tree ring
; Atlantic Ocean
; Atlantic Ocean (North)
; North America
; Pacific Ocean
; Pacific Ocean (Tropical)
英文摘要: Western North America (WNA) is rich in hydroclimate reconstructions, yet questions remain about the causes of decadal-to-multidecadal hydroclimate variability. Teleconnection patterns preserved in annually-resolved tree-ring reconstructed drought maps, and anomalies in a global network of proxy sea surface temperature (SST) reconstructions, were used to reassess the evidence linking ocean forcing to WNA hydroclimate variability over the past millennium. Potential forcing mechanisms of the Medieval Climate Anomaly (MCA) and individual drought and pluvial events—including two multidecadal-length MCA pluvials—were evaluated. We show strong teleconnection patterns occurred during the driest (wettest) years within persistent droughts (pluvials), implicating SSTs as a potent hydroclimate forcing mechanism. The role of the SSTs on longer timescales is more complex. Pacific teleconnection patterns show little long-term change, whereas low-resolution SST reconstructions vary over decades to centuries. While weaker than the tropical Pacific teleconnections, North Atlantic teleconnection patterns and SST reconstructions also show links to WNA droughts and pluvials, and may in part account for longer-term WNA hydroclimate changes. Nonetheless, evidence linking WNA hydroclimate to SSTs still remains sparse and nuanced—especially over long-timescales with a broader range of hydroclimatic variability than characterized during the 20th century. © 2016 Elsevier Ltd 资助项目: Routson, C.C.PO Box 4099, 625 S Knoles Dr, Building 12, Rm 100, United States
; 电子邮件: Cody.Routson@nau.edu
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59533
Appears in Collections: 过去全球变化的重建
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作者单位: School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ, United States; Department of Geosciences, University of Arizona, Tucson, AZ, United States; Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ, United States; School of Geography and Development, University of Arizona, Tucson, AZ, United States; Institute of the Environment, University of Arizona, Tucson, AZ, United States; Department of Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; National Research Program, Water Mission Area, U.S. Geological Survey, Reston, VA, United States
Recommended Citation:
Routson C.C.,Woodhouse C.A.,Overpeck J.T.,et al. Teleconnected ocean forcing of Western North American droughts and pluvials during the last millennium[J]. Quaternary Science Reviews,2016-01-01,146