noaa-cave-12279 Northern Alps 120-60 KYrBP Speleothem d18O Data Boch, R.; Cheng, H.; Spötl, C.; Edwards, R.L.; Wang, X.; Häuselmann, P. Northern Alps 120-60 KYrBP Speleothem d18O Data 2011-11-25 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/12279 Investigator R. Boch Investigator H. Cheng Investigator C. Spötl Investigator R.L. Edwards Investigator X. Wang Investigator P. Häuselmann 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 oxygen isotopes geoscientificInformation Dansgaard-Oeschger cycles 118315 cal yr BP 63719 cal yr BP Complete 46.6333 47.4333 7.8167 9.8667 780 1964 Continent Europe Western Europe Austria Baschg Cave>LATITUDE 47.4>LONGITUDE 9.7 Continent Europe Western Europe Austria Klaus-Cramer Cave>LATITUDE 47.4333>LONGITUDE 9.8667 Continent Europe Western Europe Switzerland Beatus Cave>LATITUDE 46.6333>LONGITUDE 7.8167 Continent Europe Western Europe Austria Schneckenloch Cave>LATITUDE 47.4333>LONGITUDE 9.8667 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 Boch, R., H. Cheng, C. Spötl, R.L. Edwards, X. Wang, and Ph. Häuselmann. 2011. NALPS: a precisely dated European climate record 120-60 ka. Climate of the Past, Vol. 7, pp. 1247-1259. www.clim-past.net/7/1247/2011/ doi: 10.5194/cp-7-1247-2011

Accurate and precise chronologies are essential in understanding the rapid and recurrent climate variations of the Last Glacial - known as Dansgaard-Oeschger (D-O) events - found in the Greenland ice cores and other climate archives. The existing chronological uncertainties during the Last Glacial, however, are still large. Radiometric age data and stable isotopic signals from speleothems are promising to improve the absolute chronology. We present a record of several precisely dated stalagmites from caves located at the northern rim of the Alps (NALPS), a region that favours comparison with the climate in Greenland. The record covers most of the interval from 120 to 60 ka at an average temporal resolution of 2 to 22 yr and 2sigma-age uncertainties of ca. 200 to 500 yr. The rapid and large oxygen isotope shifts of 1 to 4.5‰ occurred within decades to centuries and strongly mimic the Greenland D-O pattern. Compared to the updated Greenland ice-core timescale (GICC05modelext) the NALPS record confirms the timing of rapid warming and cooling transitions between 118 and 106 ka, but suggests younger ages for D-O events between 106 and 60 ka. As an exception, the timing of the rapid transitions into and out of the stadial following GI 22 is earlier in NALPS than in the Greenland ice-core timescale. In addition, there is a discrepancy in the duration of this stadial between the icecore and the stalagmite chronology (ca. 2900 vs. 3650 yr). The short-lived D-O events 18 and 18.1 are not recorded in NALPS, provoking questions with regard to the nature and the regional expression of these events. NALPS resolves recurrent short-lived climate changes within the cold Greenland stadial and warm interstadial successions, i.e. abrupt warming events preceding GI 21 and 23 (precursor-type events) and at the end of GI 21 and 25 (rebound-type events), as well as intermittent cooling events during GI 22 and 24. Such superimposed events have not yet been documented outside Greenland. STUDY NOTES: A climate record consisting of several precisely dated stalagmites from four carefully selected cave sites located at the northern rim of the European Alps (NALPS) is presented. The region is exposed to a strong Atlantic influence via northwesterly winds favouring a comparison with climate in Greenland. The NALPS stable Oxygen isotope curves consist of 8200 individual analyses (average temporal resolution of 2 to 22 yr) and show rapid and large isotope shifts (recurrent Dansgaard-Oeschger (D-O) events and sub-D-O events) of up to 4.5 ‰, underscoring the high sensitivity of the cave sites. The record from seven stalagmites covers most of the interval from 120 to 60 ka and is temporally constrained by 154 U-Th ages (20-30 per stalagmite) with typical 2sigma-age uncertainties of 200 to 500 yr.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/nalps2011.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/nalps2011.xls USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11