noaa-cave-19460 Natural Bridge Caverns, Texas 6700 Year Speleothem Stable Isotope Data Wong, C.I.; Banner, J.L.; Musgrove, M. Natural Bridge Caverns, Texas 6700 Year Speleothem Stable Isotope Data 2015-11-06 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19460 Investigator C.I. Wong Investigator J.L. Banner Investigator M. Musgrove earth science paleoclimate speleothems depth,null,null,millimeter,null,speleothems,null,null,N,null earth science paleoclimate speleothems age,null,null,calendar year before present,null,speleothems,null,null,N,null 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 delta 13C,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null earth science paleoclimate speleothems carbon isotopes earth science paleoclimate speleothems oxygen isotopes geoscientificInformation 6736 cal yr BP 19 cal yr BP Complete 29.69 29.69 -98.34 -98.34 Continent North America United States Of America Texas Natural Bridge Caverns>LATITUDE 29.69>LONGITUDE -98.34 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 Corinne I. Wong, Jay L. Banner, MaryLynn Musgrove 2015 Quaternary Science Reviews 127 155-173 10.1016/j.quascirev.2015.06.023

Delineating the climate processes governing precipitation variability in drought-prone Texas is critical for predicting and mitigating climate change effects, and requires the reconstruction of past climate beyond the instrumental record. We synthesize existing paleoclimate proxy data and climate simulations to provide an overview of climate variability in Texas during the Holocene. Conditions became progressively warmer and drier transitioning from the early to mid Holocene, culminating between 7 and 3 ka (thousand years ago), and were more variable during the late Holocene. The timing and relative magnitude of Holocene climate variability, however, is poorly constrained owing to considerable variability among the different records. To help address this, we present a new speleothem (NBJ) reconstruction from a central Texas cave that comprises the highest resolution proxy record to date, spanning the mid to late Holocene. NBJ trace-element concentrations indicate variable moisture conditions with no clear temporal trend. There is a decoupling between NBJ growth rate, trace-element concentrations, and d18O values, which indicate that (i) the often direct relation between speleothem growth rate and moisture availability is likely complicated by changes in the overlying ecosystem that affect subsurface CO2 production, and (ii) speleothem d18O variations likely reflect changes in moisture source (i.e., proportion of Pacific-vs. Gulf of Mexico-derived moisture) that appear not to be linked to moisture amount. STUDY NOTES: Speleothem stable isotope (d18O and d13C) from Natural Bridge Caverns, Bexar County, central Texas for the past 6,700 years.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/texas/naturalbridge2015.txt Data File; Natural Bridge Cavern Stable Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11