DOI: 10.1016/j.quascirev.2014.08.005
Scopus记录号: 2-s2.0-84906568541
论文题名: Tropical Pacific forcing of Late-Holocene hydrologic variability in the coastal southwest United States
作者: Kirby M.E. ; Feakins S.J. ; Hiner C.A. ; Fantozzi J. ; Zimmerman S.R.H. ; Dingemans T. ; Mensing S.A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 102 起始页码: 27
结束页码: 38
语种: 英语
英文关键词: Climate
; Drought
; Hydrogen isotope
; Leaf wax
; Runoff
Scopus关键词: Catchments
; Isotopes
; Lakes
; Moisture
; Runoff
; Tropics
; Catchments
; Grain size and shape
; Isotopes
; Lakes
; Moisture
; Runoff
; Tropics
; Atmospheric circulation
; Climate
; Grain-size analysis
; Hydrogen isotope
; Hydrologic changes
; Long-term relationships
; Sedimentological data
; Water availability
; Grain size analysis
; Drought
; Drought
; data set
; drought stress
; geochemical method
; Holocene
; hydrogen isotope
; proxy climate record
; runoff
; sedimentology
; water availability
; atmospheric circulation
; climate forcing
; climate variation
; coastal zone
; El Nino
; grain size
; hydrological cycle
; Little Ice Age
; moisture content
; California
; Pacific Ocean
; Pacific Ocean (Tropical)
; Santa Barbara [California]
; United States
; Zaca Lake
英文摘要: Change in water availability is of great concern in the coastal southwest United States (CSWUS). Reconstructing the history of water pre-1800 AD requires the use of proxy data. Lakes provide long-lived, high-resolution terrestrial archives of past hydrologic change, and their sediments contain a variety of proxies. This study presents geochemical and sedimentological data from Zaca Lake, CA (Santa Barbara County) used to reconstruct a 3000 year history of winter season moisture source (δDwax) and catchment run-off (125-2000μm sand) at decadal resolution. Here we show that winter season moisture source and run-off are highly variable over the past 3000 years; superimposed are regime shifts between wetter or drier conditions that persist on average over multiple centuries. Moisture source and run-off do not consistently covary indicating multiple atmospheric circulation modes where wetter/drier conditions prevail. Grain-size analysis reveals two intervals of multi-century drought with less run-off that pre-date the "epic droughts" as identified by Cook etal. (2004). A well-defined wet period with more run-off is identified during the Little Ice Age. Notably, the grain size data show strong coherence with western North American percent drought area indices for the past 1000 years. As a result, our data extend the history of drought and pluvials back to 3000 calendar years BP in the CSWUS. Comparison to tropical Pacific proxies confirms the long-term relationship between El Niño and enhanced run-off in the CSWUS. Our results demonstrate the long-term importance of the tropical Pacific to the CSWUS winter season hydroclimate. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60148
Appears in Collections: 过去全球变化的重建
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作者单位: California State University, Fullerton, Department of Geological Sciences, Fullerton, CA 92834, United States; University of Southern California, Department of Earth Sciences, Los Angeles, CA 90089, United States; Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore CA 94550, United States; Department of Geography, University of Nevada, Reno, NV 89557, United States
Recommended Citation:
Kirby M.E.,Feakins S.J.,Hiner C.A.,et al. Tropical Pacific forcing of Late-Holocene hydrologic variability in the coastal southwest United States[J]. Quaternary Science Reviews,2014-01-01,102