Korallgrottan, Sweden 4000 Year Stalagmite Stable Isotope Data Sundqvist, H.; Holmgren, K.; Moberg, A.; Spötl, C.; Mangini, A. Sundqvist, H. Holmgren, K. Moberg, A. Spötl, C. Mangini, A. decadal resolution 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,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 earth science/paleoclimate/speleothems (Korallgrottan Stalagmite>LATITUDE 64.89>LONGITUDE 14.16) This study of a 4000-year-old stalagmite from Korallgrottan in northwestern Sweden highlights the potentials and challenges when using stable isotopes in stalagmites as climate proxies, as well as the fact that the relationship between climate and proxy may change through time. Both the oxygen and the carbon isotopes display an overall trend of enrichment together with decreasing growth rates over the time period covered by the stalagmite, which is considered a generally cooling period according to current palaeoclimate understanding. The stable isotope records show enriched isotopic values during the, for Scandinavia, comparatively cold period AD 1300-1700 and depleted values during the warmer period AD 800-1000. The indication of a negative relationship between measured d18O and surface temperature concurs with earlier reported stalagmite records from regions with a seasonal snow cover and is further supported by the fact that the stalagmite d18O record shows general similarities with both regional and hemispheric temperature reconstructions available for the past 500 and 2000 years, respectively. Compared with a stable isotope record of lacustrine carbonates from northern Sweden, however, shifting correlations over time between the two records indicate that a local hydrological change may have taken place at Korallgrottan, or at the lake, compared with around 1000 years ago. The earlier part of the stalagmite d18O might thus be influenced, to some extent, by another process than the later part, which means that a negative relationship between d18O and surface temperature might not hold for the entire 4000-year-old record. STUDY NOTES: Stable oxygen and carbon isotope data from Korallgrottan, northwestern Sweden. Korallgrottan is located in the Caledonian mountain range about 100 km off the North Atlantic coast in the county of Jämtland. Stalagmite K11 is 47mm long, with a basal diameter of about 50 mm. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Sundqvist, H. Investigator : Holmgren, K. Investigator : Moberg, A. Investigator : Spötl, C. Investigator : Mangini, A. 2010-10-06 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/9745 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/sweden/korallgrottan2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/sweden/korallgrottan2010.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/sweden/korallgrottan2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/sweden/korallgrottan2010.xls English https://www.ncdc.noaa.gov/paleo/study/9745 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/sweden/korallgrottan2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/sweden/korallgrottan2010.xls Sundqvist, H.S., K. Holmgren, A. Moberg, C. Spötl, and A. Mangini. 2010. Stable isotopes in a stalagmite from NW Sweden document environmental changes over the past 4000 years. Boreas, Vol. 39, pp. 77-86, January 2010. DOI: 10.1111/j.1502-3885.2009.00099.x START YEAR: -1842 AD * END YEAR: 2005 AD 14.16 64.89 14.16 64.89