noaa-cave-14350
Juxtlahuaca Cave, Mexico 22,000 Year Stalagmite Oxygen Isotope Data
Lachniet, M.S.; Asmerom, Y.; Bernal, J.P.; Polyak, V.J.; Vazquéz-Selem, L.
Juxtlahuaca Cave, Mexico 22,000 Year Stalagmite Oxygen Isotope Data
2013-05-06
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/14350
Investigator
M.S.
Lachniet
Investigator
Y.
Asmerom
Investigator
J.P.
Bernal
Investigator
V.J.
Polyak
Investigator
L.
Vazquéz-Selem
earth science
paleoclimate
speleothems
depth,null,null,millimeter,null,speleothems,null,null,N,null
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,corrected,isotope ratio mass spectrometry,N,corrected for ice volume
earth science
paleoclimate
speleothems
age,null,null,calendar year before present,null,speleothems,null,null,N,present defined as 2000 CE
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
speleothems
oxygen isotopes
geoscientificInformation
Monsoon
22111 cal yr BP
0 cal yr BP
Complete
17.44
17.44
-99.16
-99.16
927
927
Continent
North America
Mexico
Juxtlahuaca Cave>LATITUDE 17.44>LONGITUDE -99.16
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
Matthew Lachniet, Yemane Asmerom, Juan Pablo Bernal, Victor J. Polyak, and Lorenzo Vazquéz-Selem. 2013. Orbital pacing and ocean circulation-induced collapses of the Mesoamerican monsoon over the past 22,000 y. 2013.
Proceedings of the National Academy of Sciences, Vol. 110, No. 23, pp. 9255-9260, 4 June 2013.
DOI: 10.1073/pnas.1222804110
The dominant controls on global paleomonsoon strength include summer insolation driven by precession cycles, ocean circulation through its influence on atmospheric circulation, and sea-surface temperatures. However, few records from the summer North American Monsoon system are available to test for a synchronous response with other global monsoons to shared forcings. In particular, the monsoon response to widespread atmospheric reorganizations associated with disruptions of the Atlantic Meridional Overturning Circulation (AMOC) during the deglacial period remains unconstrained. Here, we present a high-resolution and radiometrically dated monsoon rainfall reconstruction over the past 22,000 y from speleothems of tropical southwestern Mexico. The data document an active Last Glacial Maximum (18-24 cal ka B.P.) monsoon with similar d18O values to the modern, and that the monsoon collapsed during periods of weakened AMOC during Heinrich stadial 1 (ca. 17 ka) and the Younger Dryas (12.9-11.5 ka). The Holocene was marked by a trend to a weaker monsoon that was paced by orbital insolation. We conclude that the Mesoamerican monsoon responded in concert with other global monsoon regions, and that monsoon strength was driven by variations in the strength and latitudinal position of the Intertropical Convergence Zone, which was forced by AMOC variations in the North Atlantic Ocean. The surprising observation of an active Last Glacial Maximum monsoon is attributed to an active but shallow AMOC and proximity to the Intertropical Convergence Zone. The emergence of agriculture in southwestern Mexico was likely only possible after monsoon strengthening in the Early Holocene at ca. 11 ka.
STUDY NOTES: Oxygen isotope (d18O) data from 3 stalagmites from Juxtlahuaca Cave, Mexico, covering the last 22,000 years.
Data are presented as both raw d18O measurements and d18Oswc (where swc refers to sea-water corrected) used for Figures 1-3
in Lachniet et al., 2013 PNAS. 1) The stalagmite d18O values were interpolated to a 10-year resolution 2) and corrected for
changes in the d18O value of the ocean according to the reconstruction of Waelbroeck C, et al. (2002) Sea-level and deep water
temperature changes derived from benthic foraminifera isotopic records. Quaternary Science Reviews 21(1-3):295-305
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USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11