DOI: 10.1016/j.gloplacha.2015.07.006
论文题名: A model of the 4000-year paleohydrology (δ18O) record from Lake Salpetén, Guatemala
作者: Rosenmeier M.F. ; Brenner M. ; Hodell D.A. ; Martin J.B. ; Curtis J.H. ; Binford M.W.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2016
卷: 138 起始页码: 43
结束页码: 55
语种: 英语
英文关键词: Guatemala
; Holocene
; Maya
; Paleoclimate
; Stable isotopes
; Watershed modeling
Scopus关键词: Catchments
; Isotopes
; Lakes
; Runoff
; Vegetation
; Guatemala
; Holocenes
; Maya
; Paleoclimates
; Stable isotopes
; Watershed modeling
; Climate models
英文摘要: A simple mass-balance model provides insights into the influence of catchment vegetation changes and climate variability on the hydrologic and stable oxygen isotope (δ18O) evolution of Lake Salpetén, in the Maya Lowlands of northern Guatemala. Model simulations for the last 4000 years incorporate pollen-inferred changes in vegetation cover and account for 75% of the variance observed in the biogenic carbonate δ18O record from a long lake sediment core. Vegetation-driven hydrologic changes, however, failed to capture the full range of late Holocene sediment core δ18O variability. The model requires incorporation of additional shifts in catchment vegetation cover, inclusion of regional precipitation changes, or likely both, to explain the fluctuations observed in the lake core oxygen isotope record. Climatic interpretation of the model results suggests that there was relatively greater moisture availability between about 2400 and 1800 years ago, but increased δ18O values centered at ~3300, 2900, 500, and 200 calendar years before present (cal yr BP) indicate abrupt precipitation decreases. There is evidence for protracted aridity between 1500 and 800 cal yr BP. © 2015 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959174269&doi=10.1016%2fj.gloplacha.2015.07.006&partnerID=40&md5=dc72c9bf4db88ff1c17cf39eb281e5f0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11706
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Department of Geological Sciences and Land Use and Environmental Change Institute, University of Florida, PO Box 112120, Gainesville, FL, United States
Recommended Citation:
Rosenmeier M.F.,Brenner M.,Hodell D.A.,et al. A model of the 4000-year paleohydrology (δ18O) record from Lake Salpetén, Guatemala[J]. Global and Planetary Change,2016-01-01,138.