气候变化领域集成服务门户(CCPortal): Quantification of drought during the collapse of the classic Maya civilization

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DOI	10.1126/science.aas9871
	Quantification of drought during the collapse of the classic Maya civilization
	Evans N.P.; Bauska T.K.; Gázquez-Sánchez F.; Brenner M.; Curtis J.H.; Hodell D.A.
发表日期	2018
ISSN	0036-8075
起始页码	498
结束页码	501
卷号	361 期号:6401
英文摘要	The demise of Lowland Classic Maya civilization during the Terminal Classic Period (~800 to 1000 CE) is a well-cited example of how past climate may have affected ancient societies. Attempts to estimate the magnitude of hydrologic change, however, have met with equivocal success because of the qualitative and indirect nature of available climate proxy data. We reconstructed the past isotopic composition (d18O, dD, 17O-excess, and d-excess) of water in Lake Chichancanab, Mexico, using a technique that involves isotopic analysis of the structurally bound water in sedimentary gypsum, which was deposited under drought conditions. The triple oxygen and hydrogen isotope data provide a direct measure of past changes in lake hydrology. We modeled the data and conclude that annual precipitation decreased between 41 and 54% (with intervals of up to 70% rainfall reduction during peak drought conditions) and that relative humidity declined by 2 to 7% compared to present-day conditions. © 2017 The Authors.
英文关键词	calcium sulfate; hydrogen; isotope; oxygen; oxygen 17; rain; drought; gypsum; hydrogen isotope; hydrological change; isotopic analysis; isotopic composition; paleoclimate; precipitable water; precipitation (climatology); quantitative analysis; reconstruction; relative humidity; Article; chemical composition; civilization; climate change; crop production; cultural anthropology; drought; environmental factor; humidity; hydrology; lake ecosystem; Maya (people); Mexico; precipitation; priority journal; qualitative analysis; drought; history; lake; Lake Chichancanab; Mexico [North America]; Quintana Roo; Civilization; Droughts; History, Ancient; Lakes; Mexico
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243638
作者单位	Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, United Kingdom; Department of Geological Sciences, University of Florida, Gainesville, FL 32611, United States
推荐引用方式 GB/T 7714	Evans N.P.,Bauska T.K.,Gázquez-Sánchez F.,et al. Quantification of drought during the collapse of the classic Maya civilization[J],2018,361(6401).
APA	Evans N.P.,Bauska T.K.,Gázquez-Sánchez F.,Brenner M.,Curtis J.H.,&Hodell D.A..(2018).Quantification of drought during the collapse of the classic Maya civilization.Science,361(6401).
MLA	Evans N.P.,et al."Quantification of drought during the collapse of the classic Maya civilization".Science 361.6401(2018).