North Atlantic storm track changes during the Last Glacial Maximum recorded by Alpine speleothems

noaa-cave-18115 Sieben Hengste Cave, Switzerland LGM Stalagmite Oxygen Isotope Data Luetscher, M.; Boch, R.; Sodemann, H.; Spötl, C.; Cheng, H.; Edwards, R.L.; Frisia, S.; Hof, F.; Müller, W. Sieben Hengste Cave, Switzerland LGM Stalagmite Oxygen Isotope Data 2015-03-03 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/18115 Investigator M. Luetscher Investigator R. Boch Investigator H. Sodemann Investigator C. Spötl Investigator H. Cheng Investigator R.L. Edwards Investigator S. Frisia Investigator F. Hof Investigator W. Müller earth science paleoclimate speleothems depth,null,null,millimeter,null,speleothems,null,null,N,null earth science paleoclimate speleothems age,null,null,calendar kiloyear 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,composited,isotope ratio mass spectrometry,N,averaged from multiple samples 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 age,null,95% confidence interval upper bound,calendar kiloyear before present,null,speleothems,null,null,N,present defined as 2000 CE earth science paleoclimate speleothems age,null,95% confidence interval lower bound,calendar kiloyear before present,null,speleothems,null,null,N,present defined as 2000 CE earth science paleoclimate speleothems oxygen isotopes geoscientificInformation Last Glacial Maximum 29959 cal yr BP 14663 cal yr BP Complete 46.77 46.77 7.83 7.83 1540 1540 Continent Europe Western Europe Switzerland Sieben Hengste Cave>LATITUDE 46.77>LONGITUDE 7.83 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 Marc Luetscher, R. Boch, H. Sodemann, C. Spötl, H. Cheng, R. L. Edwards, S. Frisia, F. Hof, W. Müller 2015 North Atlantic storm track changes during the Last Glacial Maximum recorded by Alpine speleothems Nature Communications 6 6344 10.1038/ncomms7344 http://www.nature.com/ncomms/2015/150227/ncomms7344/full/ncomms7344.html

The European Alps are an effective barrier for meridional moisture transport and are thus uniquely placed to record shifts in the North Atlantic storm track pattern associated with the waxing and waning of Late-Pleistocene Northern Hemisphere ice sheets. The lack of well-dated terrestrial proxy records spanning this time period, however, renders the reconstruction of past atmospheric patterns difficult. Here we present a precisely dated, continuous terrestrial record of meteoric precipitation in Europe between 30 and 14.7 ka. In contrast to present-day conditions, our speleothem data provide strong evidence for preferential advection of moisture from the South across the Alps supporting a southward shift of the storm track during the local Last Glacial Maximum (that is, 26.5-23.5 ka). Moreover, our age control indicates that this circulation pattern preceded the Northern Hemisphere precession maximum by ~3 ka, suggesting that obliquity may have played a considerable role in the Alpine ice aggradation. STUDY NOTES: Oxygen isotope (d18O) data from two alpine stalagmites from Sieben Hengste Cave, Switzerland. The d18O data were combined to get a continuous record of meteoric precipitation between 30 and 14.7 ka. Results provide strong evidence for moisture advection from the South during the Last Glacial maximum, supporting a southward shift of the storm track.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/switzerland/sieben-hengste2015.xlsx Excel Data File; Sieben Hengste Stalagmite d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/switzerland/sieben-hengste2015iso7h2.txt Text Data File; Sieben Hengste Stalagmite 7H2 d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/switzerland/sieben-hengste2015iso7h3.txt Text Data File; Sieben Hengste Stalagmite 7H3 d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/switzerland/sieben-hengste2015iso7h.txt Text Data File; Sieben Hengste Composite Stalagmite 7H2 and 7H3 d18O Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11