Svalbard Ice Cores 600 Year Annual d18O Data Isaksson, E.; Divine, E.; Kohler, J.; Martma, T.; Pohjola, V.; Motoyama, H.; Watanabe, O. Isaksson, E. Divine, E. Kohler, J. Martma, T. Pohjola, V. Motoyama, H. Watanabe, O. Arctic Oscillation (AO) earth science/paleoclimate/ice cores (ice age,null,null,year Common Era,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 18O,bulk ice,null,unspecified unit,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core (Lomonosovfonna>LATITUDE 78.73>LONGITUDE 17.57) (Austfonna>LATITUDE 79.85>LONGITUDE 24.13) We apply two different time series analytical tools to d18O records from two Svalbard ice cores. One ice core is from Lomonosovfonna at 1250 m a.s.l. and the other from Austfonna at 750 m a.s.l. These cores are estimated to cover at least the past 800 years and have been dated using a combinationof known reference horizons and glacial modelling. Wavelet analysis reveals low frequency oscillations on the 60-120-year scale on the lower elevation site Austfonna while the higher altitude site on Lomonosovfonna does not reveal such variability throughout the record. The second method, Significant Zero Crossing of Derivates (SiZer) does not resolve the low-frequency periodicity seen in the wavelet analysis. The low-frequency variability resolved by the wavelet analysis is similar to what has been found in various climate records including instrumental temperatures and tree-rings, and has been proposed as the most important oscillation for the observed trends in Arctic air temperatures. STUDY NOTES: Annual oxygen isotope (d18O) data from the Lomonosovfonna and Austfonna ice cores, Svalbard, for the past 600 years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Isaksson, E. Investigator : Divine, E. Investigator : Kohler, J. Investigator : Martma, T. Investigator : Pohjola, V. Investigator : Motoyama, H. Investigator : Watanabe, O. 2011-05-20 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11173 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/polar/svalbard/svalbard2005d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/polar/svalbard/svalbard2005d18o.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/polar/svalbard/svalbard2005d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/polar/svalbard/svalbard2005d18o.xls English https://www.ncdc.noaa.gov/paleo/study/11173 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/polar/svalbard/svalbard2005d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/polar/svalbard/svalbard2005d18o.xls Isaksson, E., D. Divine, J. Kohler, T. Martma, V. Pohjola, H. Motoyama, and O. Watanabe. 2005. Climate oscillations as recorded in Svalbard ice core d18O records between 1200-1997 AD. Geografiska Annaler: Series A, Physical Geography, Vol. 87, Issue 1, pp. 203-214, March 2005. DOI: 10.1111/j.0435-3676.2005.00253.x START YEAR: 1400 AD * END YEAR: 1998 AD 17.57 78.73 24.13 79.85