noaa-lake-5484 Lake Punta Laguna, Mexico 3,500 Year Isotopic Data Curtis, J.H. Lake Punta Laguna, Mexico 3,500 Year Isotopic Data 1996-09-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/5484 Investigator J.H. Curtis 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 age,null,null,year Common Era,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,Cytheridella ilosvayi earth science paleoclimate paleolimnology age,null,null,radiocarbon year before present,null,paleolimnology,null,null,N,null 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 delta 18O,ostracod,null,per mil PDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Cytheridella ilosvayi earth science paleoclimate paleolimnology oxygen isotopes earth science paleoclimate paleolimnology lake level geoscientificInformation 3320 cal yr BP -43 cal yr BP Complete 20.63 20.63 -87.5 -87.5 Continent North America Mexico Yucatan Lake Punta Laguna>LATITUDE 20.63>LONGITUDE -87.5 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 Curtis, J.H.. 1996. Climate Variability on the Yucatan Peninsula (Mexico) during the last 3500 years, and implications for Maya cultural evolution. Quaternary Research Vol. 46, pp. 37-47

Climate variability on the Yucatan Peninsula during the past 3500 yrs is reconstructed from the measurement of d18O in monospecific ostracods and gastropods in a 6.3-m sediment core from Lake Punta Laguna, Mexico. This late Holocene record is divided into three periods based on changes in mean d18O values. From ~3310 to ~178514C yr B.P. (Period I), low mean d18O values indicate relatively wet conditions (i.e., low evaporation to precipitation ratio,E/P). Mean oxygen isotopic values increased ~178514C yr B.P., and the interval between ~1785 and ~93014C yr B.P. (Period II) was distinctly drier than the periods before or after. The climate during the latter part of Period II was persistently dry, with exceptionally arid events centered at ~1171, 1019, and 94314C yr B.P. (equivalent to 862, 986, and 1051 A.D.). This interval of frequent drought was recorded at several other localities in Mexico and Central America, and coincided with the collapse of Classic Maya civilization. Following the last arid event, -18O values decreased abruptly at ~93014C yr B.P. (beginning of Period III), signaling a return to wetter conditions that have generally prevailed to the present, with the exception of a dry episode centered at 55914C yr B.P. (1391 A.D.). The paleoclimatic record from Punta Laguna provides evidence that multi-decadal and millennial-scale changes inE/Poccurred on the Yucatan Peninsula during the late Holocene. These wet/dry episodes may have influenced cultural evolution in Mesoamerica. STUDY NOTES: Stable isotopic data (d18O and d13C) with radiocarbon ages, from ostracod and gastropod samples taken in Lake Punta Laguna, Yucatan, Mexico. These data were used to reconstruct precipitation/evaporation ratios as a paleo-drought indicator, and are correlated to the cultural evolution of the Maya.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/puntalaguna.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/readme_curtis1996.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11