globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.07.007
论文题名:
An extended and higher-resolution record of climate and land use from stalagmite MC01 from Macal Chasm, Belize, revealing connections between major dry events, overall climate variability, and Maya sociopolitical changes
作者: Akers P.D.; Brook G.A.; Railsback L.B.; Liang F.; Iannone G.; Webster J.W.; Reeder P.P.; Cheng H.; Edwards R.L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 459
起始页码: 268
结束页码: 288
语种: 英语
英文关键词: Belize ; Classic Maya collapse ; Paleoclimate ; Resilience ; Speleothem ; Stalagmite
英文摘要: The stalagmite MC01 was recovered from Macal Chasm cave on the Vaca Plateau of Belize in 1995, and an initial paleoclimate interpretation was published in 2007. Additional uranium-thorium ages have extended the paleoenvironmental record back from 3250 to 5250 cal yr BP, and the stable isotope (δ18O and δ13C) record is dramatically improved by 660 new values. A series of major dry events (MDEs) evident in stable isotopes, ultraviolet-stimulated luminescence, and petrography began ~ 3100 cal yr BP, and the initiation of these events coincides with an increase in El Niño dominance and southern shift in the Intertropical Convergence Zone. Three MDEs, centered at 1750 cal yr BP (200 CE), 1100 cal yr BP (850 CE), and 850 cal yr BP (1100 CE) and found in other regional climate records, coincide with Maya sociopolitical changes. Residuals from regression of δ13C versus δ18O are interpreted as a proxy for maize cultivation and land clearing, with residual values gradually increasing at the start of Preclassic Period settlement (3950 cal yr BP/2000 BCE), peaking after 2250 cal yr BP (300 BCE) during major Maya development in the Late Preclassic and Classic Periods, and dropping to pre-Preclassic values after regional land abandonment (~ 850 cal yr BP/1100 CE). Regional Maya population growth and cultural expansion may have been aided by abnormally low precipitation variability, as stable isotope variability suggests the Late Preclassic through the Late Classic was the most stable precipitation regime of the past 4000 years. This additional research on MC01 complements other regional paleoenvironmental records that suggest that MDEs coincided with disruptions in Maya society from the Preclassic through the Postclassic Periods. Although it is clear that not all significant sociopolitical changes can be attributed to the MDEs, these events likely played an antagonistic role in social stability. © 2016
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68299
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geography, University of Georgia, Athens, GA, United States; Department of Geology, University of Georgia, Athens, GA, United States; Department of Geography, Western Illinois University, Macomb, IL, United States; Department of Anthropology, Trent University, K9L 0G2, Peterborough, ON, Canada; United States Environmental Protection Agency1, Atlanta, GA, United States; Bayer School of Natural and Environmental Sciences, Duquesne University, Pittsburgh, PA, United States; College of Global Environmental Change, Xi'an Jiaotong University, Xi'anShaanxi, China; Department of Geology and Geophysics, University of Minnesota, Minneapolis, MN, United States

Recommended Citation:
Akers P.D.,Brook G.A.,Railsback L.B.,et al. An extended and higher-resolution record of climate and land use from stalagmite MC01 from Macal Chasm, Belize, revealing connections between major dry events, overall climate variability, and Maya sociopolitical changes[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,459
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