DOI: 10.1016/j.quascirev.2014.08.004
Scopus记录号: 2-s2.0-84908450165
论文题名: An 8700 year paleoclimate reconstruction from the southern Maya lowlands
作者: Wahl D. ; Byrne R. ; Anderson L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 103 起始页码: 19
结束页码: 25
语种: 英语
英文关键词: Holocene
; Maya lowlands
; Oxygen isotopes
; Paleoclimate
; Pollen
; Zea
Scopus关键词: Holocenes
; Maya lowlands
; Oxygen isotopes
; Paleoclimates
; Pollen
; Zea
; Zea
英文摘要: Analysis of a sediment core from Lago Puerto Arturo, a closed basin lake in northern Peten, Guatemala, has provided an ~8700calyear record of climate change and human activity in the southern Maya lowlands. Stable isotope, magnetic susceptibility, and pollen analyses were used to reconstruct environmental change in the region. Results indicate a relatively wet early to middle Holocene followed by a drier late Holocene, which we interpret as reflecting long-term changes in insolation (precession). Higher frequency variability is more likely attributable to changes in ocean/atmosphere circulation in both the North Atlantic and the Pacific Oceans. Pollen and isotope data show that most of the period of prehispanic agricultural settlement, i.e. ~5000-1000calyrBP, was characterized by drier conditions than previous or subsequent periods. The presence of Zea (corn) pollen through peak aridity during the Terminal Classic period (~1250-1130calyrBP) suggests that drought may not have had as negative an impact as previously proposed. A dramatic negative shift in isotope values indicates an increase in precipitation after ~950calyrBP (hereafter BP). © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60137
Appears in Collections: 过去全球变化的重建
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作者单位: U.S. Geological Survey, 345 Middlefield Rd. MS-975, Menlo Park, CA, United States; Department of Geography, University of California, Berkeley, CA, United States
Recommended Citation:
Wahl D.,Byrne R.,Anderson L.. An 8700 year paleoclimate reconstruction from the southern Maya lowlands[J]. Quaternary Science Reviews,2014-01-01,103