noaa-lake-5482
Lake Peten-Itza, Guatemala 9,000 Year Stable Isotopic Data
Curtis, J.H.
Lake Peten-Itza, Guatemala 9,000 Year Stable Isotopic Data
2008-08-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/5482
Investigator
J.H.
Curtis
earth science
paleoclimate
paleolimnology
delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Pseudocandona sp.
earth science
paleoclimate
paleolimnology
delta 13C,gastropod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Pyrgophorus sp.
earth science
paleoclimate
paleolimnology
depth,null,null,centimeter,null,paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Cytheridella ilosvayi
earth science
paleoclimate
paleolimnology
delta 13C,gastropod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Cochliopina sp.
earth science
paleoclimate
paleolimnology
delta 18O,gastropod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Pyrgophorus sp.
earth science
paleoclimate
paleolimnology
delta 13C,ostracod,null,per mil VPDB,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 18O,gastropod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Cochliopina sp.
earth science
paleoclimate
paleolimnology
delta 13C,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Pseudocandona sp.
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
lake level
geoscientificInformation
10070 cal yr BP
-2 cal yr BP
Complete
16.91667
16.91667
-89.83333
-89.83333
Continent
North America
Central America
Guatemala
Lake Peten-Itza>LATITUDE 16.91667>LONGITUDE -89.83333
None
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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
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Curtis, J.H.. 1998. A multi-proxy study of Holocene environmental change in the Maya lowlands of Peten, Guatemala. Journal of Paleolimnology Vol. 19, pp. 139-159
We used multiple variables in a sediment core from Lake Peten-Itza, Peten, Guatemala, to infer Holocene climate change and human influence on the regional environment. Multiple proxies including pollen, stable isotope geochemistry, elemental composition, and magnetic susceptibility in samples from the same core allow differentiation of natural versus anthropogenic environmental changes. Core chronology is based on AMS 14C measurement of terrestrial wood and charcoal and thus avoids the vagaries of hard-water-lake error. During the earliest Holocene, prior to ~9000 14C yr BP, the coring site was not covered by water and all proxies suggest that climatic conditions were relatively dry. Water covered the coring site by ~9000 14C yr BP, coinciding with filling of other lakes in Peten and farther north on the Yucatan Peninsula. During the early Holocene (~9000 to ~6800 14C yr BP), pollen data suggest moist conditions, but high delta 18O values are indicative of relatively high E/P. This apparent discrepancy may be due to a greater fractional loss of the lake''s water budget to evaporation during the early stages of lake filling. Nonetheless, conditions were moist enough to support semi-deciduous lowland forest. Decrease in delta 18O values and associated change in ostracod species at ~6800 14C yr BP suggest a transition to even moister conditions. Decline in lowland forest taxa beginning ~5780 14C yr BP may indicate early human disturbance. By ~2800 14C yr BP, Maya impact on the environment is documented by accelerated forest clearance and associated soil erosion. Multiple proxies indicate forest recovery and soil stabilization beginning ~1100 to 1000 14C yr BP, following the collapse of Classic Maya civilization.
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/peten_itza_cytheridella.txt
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https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/peten_itza_psudocandona.xls
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https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/peten_itza_cochliopina.txt
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https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/peten_itza_cytheridella.xls
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https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/peten_itza_pyrgophorus.txt
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https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/readme_peten_itza.txt
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https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/peten_itza_psudocandona.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/peten_itza_pyrgophorus.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/yucatan/peten_itza_cochliopina.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11