noaa-cave-23083 Bir-Uja Cave, Kyrgyzstan 900 Year Stalagmite Isotope and Sr/Ca Data Fohlmeister, J.; Plessen, B.; Dudashvili, A.S.; Tjallingii, R.; Wolff, C.; Gafurov, A.; Cheng, H. Bir-Uja Cave, Kyrgyzstan 900 Year Stalagmite Isotope and Sr/Ca Data 2017-11-15 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/23083 Investigator J. Fohlmeister Investigator B. Plessen Investigator A.S. Dudashvili Investigator R. Tjallingii Investigator C. Wolff Investigator A. Gafurov Investigator H. Cheng earth science paleoclimate speleothems depth,null,null,millimeter,null,speleothems,null,null,N,null earth science paleoclimate speleothems strontium/calcium,calcium carbonate,null,dimensionless,null,speleothems,raw,energy-dispersive x-ray fluorescence spectroscopy,N,ratio x1000 earth science paleoclimate speleothems delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,corrected,isotope ratio mass spectrometry,N,time series corrected for 'in-cave' fractionation effects earth science paleoclimate speleothems age,null,null,year Common Era,null,speleothems,null,null,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 trace metals earth science paleoclimate speleothems carbon isotopes earth science paleoclimate speleothems oxygen isotopes geoscientificInformation North Atlantic Oscillation 1149 AD 2011 AD 801 cal yr BP -61 cal yr BP Complete 40.4833 40.4833 72.5833 72.5833 1425 1425 Continent Asia Southcentral Asia Kyrgyzstan Bir-Uja Cave>LATITUDE 40.4833>LONGITUDE 72.5833 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 Jens Fohlmeister, Birgit Plessen, Alexey Sergeevich Dudashvili, Rik Tjallingii, Christian Wolff, Abror Gafurov, Hai Cheng 2017 Quaternary Science Reviews 178 24-36 10.1016/j.quascirev.2017.10.026 http://www.sciencedirect.com/science/article/pii/S0277379117308491

The strength of the North Atlantic Oscillation (NAO) is considered to be the main driver of climate changes over the European and western Asian continents throughout the last millennium. For example, the predominantly warm Medieval Climate Anomaly (MCA) and the following cold period of the Little Ice Age (LIA) over Europe have been associated with long-lasting phases with a positive and negative NAO index. Its climatic imprint is especially pronounced in European winter seasons. However, little is known about the influence of NAO with respect to its eastern extent over the Eurasian continent. Here we present speleothem records (d13C, d18O and Sr/Ca) from the southern rim of Fergana Basin (Central Asia) revealing annually resolved past climate variations during the last millennium. The age control of the stalagmite relies on radiocarbon dating as large amounts of detrital material inhibit accurate 230Th dating. Present-day calcification of the stalagmite is most effective during spring when the cave atmosphere and elevated water supply by snow melting and high amount of spring precipitation provide optimal conditions. Seasonal precipitation variations cause changes of the stable isotope and Sr/Ca compositions. The simultaneous changes in these geochemical proxies, however, give also evidence for fractionation processes in the cave. By disentangling both processes, we demonstrate that the amount of winter precipitation during the MCA was generally higher than during the LIA, which is in line with climatic changes linked to the NAO index but opposite to the higher mountain records of Central Asia. Several events of strongly reduced winter precipitation are observed during the LIA in Central Asia. These dry winter events can be related to phases of a strong negative NAO index and all results reveal that winter precipitation over the central Eurasian continent is tightly linked to atmospheric NAO modes by the westerly wind systems. STUDY NOTES: Speleothem oxygen and carbon isotope and trace element records from Bir-Uja Cave, Kyrgyzstan, Central Asia

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/kyrgyzstan/bir-uja2017iso.txt Formatted Text Data File; Bir-Uja Cave Stalagmite Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/kyrgyzstan/bir-uja2017sr-ca.txt Formatted Text Data File; Bir-Uja Cave Stalagmite Sr/Ca Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11