noaa-lake-6107 Aguada X'caamal, Mexico 4,500 Year Stable Isotope Data Hodell, D.A.; Brenner, M.; Curtis, J.H.; Medina-Gonzalez, R.; Can, E.I.-C.; Albornaz-Pat, A.; Guilderson, T.P. Aguada X'caamal, Mexico 4,500 Year Stable Isotope Data 2001-08-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/6107 Investigator D.A. Hodell Investigator M. Brenner Investigator J.H. Curtis Investigator R. Medina-Gonzalez Investigator E.I.-C. Can Investigator A. Albornaz-Pat Investigator T.P. Guilderson earth science paleoclimate paleolimnology delta 18O,gastropod,null,per mil PDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Pyrgophorus coronatus earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,corrected to sediment water interface earth science paleoclimate paleolimnology delta 13C,carbonate,null,per mil PDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,charophyte encrustation earth science paleoclimate paleolimnology carbonate,sediment,null,percent,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 18O,ostracod,null,per mil PDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Darwinula stevensoni earth science paleoclimate paleolimnology age,null,null,year Common Era,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 18O,carbonate,null,per mil PDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,charophyte encrustation earth science paleoclimate paleolimnology age,null,null,radiocarbon year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 13C,ostracod,null,per mil PDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Darwinula stevensoni earth science paleoclimate paleolimnology delta 13C,gastropod,null,per mil PDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Pyrgophorus coronatus earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology oxygen isotopes geoscientificInformation 4500 cal yr BP -50 cal yr BP Complete 20.61 20.61 -89.715 -89.715 Continent North America Mexico Yucatan Aguada X'caamal>LATITUDE 20.61>LONGITUDE -89.715 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 Hodell, D.A., M. Brenner, J.H. Curtis, R. Medina-Gonzalez, M.F. Rosenmeier, T.P. Guilderson, E.I.-C Can, A. Albornaz-Pat, and T.P. Guilderson 2005 Quaternary Research 63 109-121 10.1016/j.yqres.2004.11.004

We studied a 5.1-m sediment core from Aguada X'caamal (20deg 36.6'N, 89deg 42.9'W), a small sinkhole lake in northwest Yucatan, Mexico. Between 1400 and 1500 A.D., oxygen isotope ratios of ostracod and gastropod carbonate increased by an average of 2.2 per mil and the benthic foraminifer Ammonia beccarii parkinsoniana appeared in the sediment profile, indicating a hydrologic change that included increased lake water salinity. Pollen from a core in nearby Cenote San Jose Chulchaca showed a decrease in mesic forest taxa during the same period. Oxygen isotopes of shell carbonate in sediment cores from Lakes Chichancanab (19deg 53.0'N, 88deg 46.0'W) and Salpeten (16deg 58.6'N, 89deg 40.5'W) to the south also increased in the mid-15th century, but less so than in Aguada X'caamal. Climate change in the 15th century is also supported by historical accounts of cold and famine described in Maya and Aztec chronicles. We conclude that climate became drier on the Yucatan Peninsula in the 15th century A.D. near the onset of the Little Ice Age (LIA). Comparison of results from the Yucatan Peninsula with other circum-Caribbean paleoclimate records indicates a coherent climate response for this region at the beginning of the LIA. At that time, sea surface temperatures cooled and aridity in the circum-Caribbean region increased. STUDY NOTES: Stable isotopic data (d18O and d13C) with radiocarbon ages, from ostracod and gastropod samples taken in Lake Peten-Itza, Guatemala (1993 core). These data were used to reconstruct precipitation/evaporation ratios as a paleo-drought indicator.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/aguada-xcaamal2005.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/aguada-xcaamal2005.xls USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11