Southeast Sweden 1,000 Year Tree-Ring Isotopes and Climate Reconstructions Edwards, T.W.D.; Hammarlund, D.; Newton, B.W.; Sjolte, J.; Linderson, H.; Sturm, C.; St. Amour, N.A.; Bailey, J.N.-L.; Nilsson, A.L. Edwards, T.W.D. Hammarlund, D. Newton, B.W. Sjolte, J. Linderson, H. Sturm, C. St. Amour, N.A. Bailey, J.N.-L. Nilsson, A.L. earth science/paleoclimate/tree ring (age at sample end,null,null,year Common Era,null,tree ring,null,null,N,null) earth science/paleoclimate/tree ring (delta 18O,cellulose,null,per mil VSMOW,null,tree ring,null,null,N,null) earth science/paleoclimate/climate reconstructions|tree ring (relative humidity,delta 13C|delta 18O,null,standard deviation unit,Jun,climate reconstructions|tree ring,normalized,null,N,null) earth science/paleoclimate/tree ring (delta 13C,cellulose,null,per mil VPDB,null,tree ring,null,null,N,null) earth science/paleoclimate/tree ring (delta 13C,cellulose,null,per mil VPDB,null,tree ring,corrected,null,N,corrected for changing d13C of atmospheric CO2 post-1850) earth science/paleoclimate/tree ring (age at sample start,null,null,year Common Era,null,tree ring,null,null,N,null) earth science/paleoclimate/climate reconstructions|tree ring (surface temperature,delta 13C|delta 18O,null,standard deviation unit,Feb,climate reconstructions|tree ring,normalized,null,N,null) earth science/paleoclimate/tree-ring earth science/paleoclimate/tree-ring (Southeast Sweden>LATITUDE >LONGITUDE ) Here we report new reconstructions of winter temperature and summer moisture during the past millennium in southeastern Sweden, based on stable-isotope data from a composite tree-ring sequence, that further enhances our knowledge and understanding of seasonal climate variability in the Northern Hemisphere over the past millennium. Key features of these new climate proxy records include evidence for distinctive fluctuations in winter temperature in SE Sweden, superimposed upon the general pattern of cooling between the so-called Medieval Climate Anomaly (MCA) of the early millennium and the Little Ice Age (LIA) of the late millennium, as well as evidence for sustained summer wetness during the MCA, followed by drier and less variable conditions during the LIA. We also explore these new records within a circumpolar spatial context by employing self-organizing map analysis of meteorological reanalysis data to identify potential modern analogues of mid-tropospheric synoptic circulation types in the Northern Hemisphere extratropics that can reconcile varying seasonal climate states during the MCA and LIA in SE Sweden with less variable conditions in southwestern Canada, as portrayed by paleoclimate records developed in the same manner in an earlier study. STUDY NOTES: Pinus sylvestris tree-ring stable isotope (d13C and d18O) data from southeastern Sweden for the past 1,000 years, plus reconstructed winter temperature and summer relative humidity. IITRDB18 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Edwards, T.W.D. Investigator : Hammarlund, D. Investigator : Newton, B.W. Investigator : Sjolte, J. Investigator : Linderson, H. Investigator : Sturm, C. Investigator : St. Amour, N.A. Investigator : Bailey, J.N.-L. Investigator : Nilsson, A.L. 2017-05-24 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22121 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/europe/sweden/se-sweden2017iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/europe/sweden/se-sweden2017iso.txt English https://www.ncdc.noaa.gov/paleo/study/22121 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/europe/sweden/se-sweden2017iso.txt Thomas W.D. Edwards, Dan Hammarlund, Brandi W. Newton, Jesper Sjolte, Hans Linderson, Christophe Sturm, Natalie A. St. Amour, Joscelyn N.-L. Bailey, Anders L. Nilsson2017Seasonal variability in Northern Hemisphere atmospheric circulation during the Medieval Climate Anomaly and the Little Ice AgeQuaternary Science Reviews165102-11010.1016/j.quascirev.2017.04.018http://www.sciencedirect.com/science/article/pii/S0277379117303475 START YEAR: 950 AD * END YEAR: 2005 AD 14 57 16 59