noaa-lake-17735 Laguna de Aljojuca, Mexico 4000 Year Stable Isotope and Geochemical Data Bhattacharya, T.; Byrne, A.R.; Bohnel, H.; Wogau, K.; Kienel, U.; Ingram, B.L.; Zimmerman, S.R.H. Laguna de Aljojuca, Mexico 4000 Year Stable Isotope and Geochemical Data 2015-01-26 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17735 Investigator T. Bhattacharya Investigator A.R. Byrne Investigator H. Bohnel Investigator K. Wogau Investigator U. Kienel Investigator B.L. Ingram Investigator S.R.H. Zimmerman earth science paleoclimate paleolimnology age,null,95% confidence interval upper bound,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology age,null,95% confidence interval upper bound,calendar year before present,null,paleolimnology,null,null,N,Bayesian age model created with BACON earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,Bayesian age model created with BACON earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 18O,calcium carbonate,null,per mil VPDB,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 13C,calcium carbonate,null,per mil VPDB,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology age,null,95% confidence interval lower bound,calendar year before present,null,paleolimnology,null,null,N,Bayesian age model created with BACON earth science paleoclimate paleolimnology titanium,dry sediment,null,parts per million,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null earth science paleoclimate paleolimnology zirconium,dry sediment,null,parts per million,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null earth science paleoclimate paleolimnology aluminum oxide,dry sediment,null,percent,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null earth science paleoclimate paleolimnology age,null,95% confidence interval lower bound,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology calcium oxide,dry sediment,null,percent,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,null earth science paleoclimate paleolimnology principal component,null,null,dimensionless,null,paleolimnology,null,x-ray fluorescence spectroscopy,N,first principal component of XRF data earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology oxygen isotopes earth science paleoclimate paleolimnology carbon isotopes earth science paleoclimate paleolimnology geochemistry geoscientificInformation drought 4139 cal yr BP -65 cal yr BP Complete 19.0915 19.0915 -97.5338 -97.5338 2376 2376 Continent North America Mexico Laguna de Aljojuca>LATITUDE 19.0915>LONGITUDE -97.5338 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Tripti Bhattacharya, Roger Byrne, Harald Bohnel, Kurt Wogau, Ulrike Kienel, B. Lynn Ingram, and Susan Zimmerman 2015 Proceedings of the National Academy of Sciences 10.1073/pnas.1405653112 http://www.pnas.org/content/early/2015/01/21/1405653112.abstract

There is currently no consensus on the importance of climate change in Mesoamerican prehistory. Some invoke drought as a causal factor in major cultural transitions, including the abandonment of many sites at 900 CE, while others conclude that cultural factors were more important. This lack of agreement reflects the fact that the history of climate change in many regions of Mesoamerica is poorly understood. We present paleolimnological evidence suggesting that climate change was important in the abandonment of Cantona between 900 CE and 1050 CE. At its peak, Cantona was one of the largest cities in pre-Columbian Mesoamerica, with a population of 90,000 inhabitants. The site is located in the Cuenca Oriental, a semiarid basin east of Mexico City. We developed a subcentennial reconstruction of regional climate from a nearby maar lake, Aljojuca. The modern climatology of the region suggests that sediments record changes in summer monsoonal precipitation. Elemental geochemistry (X-ray fluorescence) and d18O from authigenic calcite indicate a centennial-scale arid interval between 500 CE and 1150 CE, overlaid on a long-term drying trend. Comparison of this record to Cantona's chronology suggests that both the city's peak population and its abandonment occurred during this arid period. The human response to climate change most likely resulted from the interplay of environmental and political factors. During earlier periods of Cantona's history, increasing aridity and political unrest may have actually increased the city's importance. However, by 1050 CE, this extended arid period, possibly combined with regional political change, contributed to the city's abandonment. STUDY NOTES: Fluctuations in climate over the past 4000 cal. years BP reconstructed from elemental geochemistry (XRF) data and d18O data of authigenic carbonates from Aljojuca maar lake in the Oriental Basin in Puebla, Mexico. Lake sediment core chronology established using AMS radiocarbon dating of terrestrial material.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/mexico/aljojuca2015xrf.txt Data File ; Elemental Geochemistry XRF Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/mexico/aljojuca2015iso.txt Data File ; Authigenic Calcite Stable Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11