noaa-recon-22692 Fennoscandia 900 Year Summer Temperature Reconstruction Linderholm, H.W.; Björklund, J.; Seftigen, K.; Gunnarson, B.E.; Fuentes, M. Fennoscandia 900 Year Summer Temperature Reconstruction 2017-09-26 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22692 Investigator H.W. Linderholm Investigator J. Björklund Investigator K. Seftigen Investigator B.E. Gunnarson Investigator M. Fuentes earth science paleoclimate climate reconstructions|tree ring age,null,null,year Common Era,null,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|tree ring temperature,ring density,one root mean square error lower bound,degree Celsius,Jun-Aug,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|tree ring temperature,ring density,null,degree Celsius,Jun-Aug,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|tree ring temperature,ring density,one root mean square error upper bound,degree Celsius,Jun-Aug,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate reconstructions air temperature geoscientificInformation Air Temperature Reconstruction 1100 AD 2006 AD 850 cal yr BP -56 cal yr BP Complete 66.42 70.83 14.05 35.32 Continent Europe Northern Europe Scandanavia Fennoscandia>LATITUDE >LONGITUDE 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 Hans W. Linderholm, Jesper Björklund, Kristina Seftigen, Björn E. Gunnarson, Mauricio Fuentes 2015 Climate Dynamics 45 3-4 933-947 10.1007/s00382-014-2328-9

Despite the spatially homogenous summer temperature pattern in Fennoscandia, there are large spreads among the many existing reconstructions, resulting in an uncertainty in the timing and amplitude of past changes. Also, there has been a general bias towards northernmost Fennoscandia. In an attempt to provide a more spatially coherent view of summer (June-August, JJA) temperature variability within the last millennium, we utilized seven density and three blue intensity Scots pine (Pinus sylvestris L.) chronologies collected from the altitudinal (Scandinavian Mountains) and latitudinal (northernmost part) treeline. To attain a JJA temperature signal as strong as possible, as well as preserving multicentury-scale variability, we used a new tree-ring parameter, where the earlywood information is removed from the maximum density and blue intensity, and a modified signal-free standardization method. Two skilful reconstructions for the period 1100-2006 CE were made, one regional reconstruction based on an average of the chronologies, and one field (gridded) reconstruction. The new reconstructions were shown to have much improved spatial representations compared to those based on data from only northern sites, thus making it more valid for the whole region. An examination of some of the forcings of JJA mean temperatures in the region shows an association with sea-surface temperature over the eastern North Atlantic, but also the subpolar and subtropical gyres. Moreover, using Superposed Epoch Analysis, a significant cooling in the year following a volcanic eruption was noted, and for the largest explosive eruptions, the effect could remain for up to 4 years. This new improved reconstruction provides a mean to reinforce our understanding of forcings on summer temperatures in the North European sector. STUDY NOTES: Reconstruction of Fennoscandian Summer (JJA) temperature based on 10 tree-ring density and blue intensity records

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/europe/fennoscandia2015temp.txt Formatted Text Data File; Fennoscandia Summer Temperature Reconstruction USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11