noaa-cave-22270 White Moon Cave, California 8.2ka Speleothem Stable Isotope Data Oster, J.L.; Sharp, W.D.; Covey, A.K.; Gibson, J.; Rogers, B.; Mix, H. White Moon Cave, California 8.2ka Speleothem Stable Isotope Data 2017-06-20 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22270 Investigator J.L. Oster Investigator W.D. Sharp Investigator A.K. Covey Investigator J. Gibson Investigator B. Rogers Investigator H. Mix earth science paleoclimate speleothems delta 13C,calcite,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null earth science paleoclimate speleothems age,null,null,calendar year before present,null,speleothems,null,null,N,null earth science paleoclimate speleothems depth,null,null,centimeter,null,speleothems,null,null,N,null earth science paleoclimate speleothems delta 18O,calcite,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 Meridional Overturning Circulation (MOC) 8604 cal yr BP 6926 cal yr BP Complete 37 37 -122.183 -122.183 170 170 Continent North America United States Of America California White Moon Cave>LATITUDE 37>LONGITUDE -122.183 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 Jessica L. Oster, Warren D. Sharp, Aaron K. Covey, Jansen Gibson, Bruce Rogers, and Hari Mix 2017 Scientific Reports 3886 7 10.1038/s41598-017-04215-5 https://www.nature.com/articles/s41598-017-04215-5

A fast-growing stalagmite from the central California coast provides a high-resolution record of climatic changes synchronous with global perturbations resulting from the catastrophic drainage of proglacial Lake Agassiz at ca. 8.2 ka. High frequency, large amplitude variations in carbon isotopes during the 8.2 ka event, coupled with pulsed increases in phosphorus concentrations, indicate more frequent or intense winter storms on the California coast. Decreased magnesium-calcium ratios point toward a sustained increase in effective moisture during the event, however the magnitude of change in Mg/Ca suggests this event was not as pronounced on the western North American coast as anomalies seen in the high northern latitudes and monsoon-influenced areas. Nevertheless, shifts in the White Moon Cave record that are synchronous within age uncertainties with cooling of Greenland, and changes in global monsoon systems, suggest rapid changes in atmospheric circulation occurred in response to freshwater input and associated cooling in the North Atlantic region. Our record is consistent with intensification of the Pacific winter storm track in response to North Atlantic freshwater forcing, a mechanism suggested by simulations of the last deglaciation, and indicates this intensification led to increases in precipitation and infiltration along the California coast during the Holocene. STUDY NOTES: Stable isotope (d13C and d18O) data from a stalagmite collected in White Moon Cave, California for the 8.2ka climate event

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/california/whitemoon2017iso.txt Formatted Text Data File; White Moon Cave Stable Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11