Lomonosovfonna, Svalbard 1,200 Year Ice Core d18O and Temperature Reconstruction Divine, D.V.; Isaksson, E.; Martma, T.; Meijer, H.A.J.; Moore, J.C.; Pohjola, V.; van de Wal, R.S.W.; Godtliebsen, F. Divine, D.V. Isaksson, E. Martma, T. Meijer, H.A.J. Moore, J.C. Pohjola, V. van de Wal, R.S.W. Godtliebsen, F. earth science/paleoclimate/climate reconstructions|ice cores (age,null,null,year Common Era,null,climate reconstructions|ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 18O,bulk ice,null,per mil SMOW,null,ice cores,interpolated,isotope ratio mass spectrometry,N,missing annual d18O in the lower part of the core interpolated using piecewise cubic interpolation) earth science/paleoclimate/climate reconstructions|ice cores (surface air temperature,delta 18O,null,degree Celsius,Dec-Feb,climate reconstructions|ice cores,null,null,N,calibration using scaling against mean Dec-Feb Longyerbyen temperature for 1912-1996 AD) earth science/paleoclimate/ice core earth science/paleoclimate/ice core (Lomonosovfonna>LATITUDE 78.73>LONGITUDE 17.57) Two isotopic ice core records from western Svalbard are calibrated to reconstruct more than 1000 years of past winter surface air temperature variations in Longyearbyen, Svalbard, and Vardø, northern Norway. Analysis of the derived reconstructions suggests that the climate evolution of the last millennium in these study areas comprises three major sub-periods. The cooling stage in Svalbard (ca. 800-1800) is characterized by a progressive winter cooling of approximately 0.9C century-1 (0.3C century-1 for Vardø) and a lack of distinct signs of abrupt climate transitions. This makes it difficult to associate the onset of the Little Ice Age in Svalbard with any particular time period. During the 1800s, which according to our results was the coldest century in Svalbard, the winter cooling associated with the Little Ice Age was on the order of 4C (1.3C for Vardø) compared to the 1900s. The rapid warming that commenced at the beginning of the 20th century was accompanied by a parallel decline in sea-ice extent in the study area. However, both the reconstructed winter temperatures as well as indirect indicators of summer temperatures suggest the Medieval period before the 1200s was at least as warm as at the end of the 1990s in Svalbard. STUDY NOTES: Ice core oxygen isotope (d18O) data and temperature reconstruction for the past 1,200 years from Lomonosovfonna, Svalbard. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Divine, D.V. Investigator : Isaksson, E. Investigator : Martma, T. Investigator : Meijer, H.A.J. Investigator : Moore, J.C. Investigator : Pohjola, V. Investigator : van de Wal, R.S.W. Investigator : Godtliebsen, F. 2017-05-19 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22541 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/polar/svalbard/lomonosovfonna2011temp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/polar/svalbard/lomonosovfonna2011temp.txt English https://www.ncdc.noaa.gov/paleo/study/22541 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/polar/svalbard/lomonosovfonna2011temp.txt Dmitry Divine, Elisabeth Isaksson, Tonu Martma, Harro A.J. Meijer, John Moore, Veijo Pohjola, Roderik S.W. van de Wal, and Fred Godtliebsen2011Thousand years of winter surface air temperature variations in Svalbard and northern Norway reconstructed from ice-core dataPolar Research737930173-7910.3402/polar.v30i0.7379http://www.tandfonline.com/doi/full/10.3402/polar.v30i0.7379 START YEAR: 769 AD * END YEAR: 1997 AD 17.57 78.73 17.57 78.73