noaa-recon-18875 Northern Hemisphere Extratropics 1400 Year MXD Summer Temperature Reconstruction Schneider, L.; Smerdon, J.E.; Büntgen, U.; Wilson, R.J.S.; Myglan, V.S.; Kirdyanov, A.; Esper, J. Northern Hemisphere Extratropics 1400 Year MXD Summer Temperature Reconstruction 2015-06-12 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/18875 Investigator L. Schneider Investigator J.E. Smerdon Investigator U. Büntgen Investigator R.J.S. Wilson Investigator V.S. Myglan Investigator A. Kirdyanov Investigator J. Esper 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 tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Alaska earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Mangazeja earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Torneträsk earth science paleoclimate instrumental surface temperature,null,null,degree Celsius,Jun-Aug,instrumental,anomalized,null,N,CRUTEM4vadj earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Pyrenees earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Zhaschiviersk earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Nscan earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Tyrol earth science paleoclimate climate reconstructions|tree ring surface temperature,ring density,95% confidence interval upper bound,degree Celsius,Jun-Aug,climate reconstructions|tree ring,anomalized,composite plus scale,N,based on latewood density; 1961-1990 AD reference period earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Athabasca earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Lauenen earth science paleoclimate climate reconstructions|tree ring surface temperature,ring density,null,degree Celsius,Jun-Aug,climate reconstructions|tree ring,anomalized,composite plus scale,N,based on latewood density; 1961-1990 AD reference period earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Lötschental earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Polarural earth science paleoclimate tree ring age,null,null,year Common Era,null,tree ring,null,null,N,null earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Altai earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Camphill earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Jämtland earth science paleoclimate climate reconstructions|tree ring surface temperature,ring density,95% confidence interval lower bound,degree Celsius,Jun-Aug,climate reconstructions|tree ring,anomalized,composite plus scale,N,based on latewood density; 1961-1990 AD reference period earth science paleoclimate tree ring tree ring standardized growth index,null,null,null,null,tree ring,composited,null,N,MXD-chronology Quebec earth science paleoclimate reconstructions air temperature geoscientificInformation Air Temperature Reconstruction 600 AD 2002 AD 1350 cal yr BP -52 cal yr BP Complete 30 90 -180 180 Geographic Region Northern Hemisphere Northern Hemisphere Extratropics>LATITUDE >LONGITUDE None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. 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Boulder CO 80305-3328 USA online ASCII Lea Schneider, Jason E. Smerdon, Ulf Buntgen, Rob J.S. Wilson, Vladimir S. Myglan, Alexander V. Kirdyanov, and Jan Esper 2015 Geophysical Research Letters 10.1002/2015GL063956 http://onlinelibrary.wiley.com/wol1/doi/10.1002/2015GL063956/full

Annually resolved and millennium-long reconstructions of large-scale temperature variability are primarily composed of tree ring width (TRW) chronologies. Changes in ring width, however, have recently been shown to bias the ratio between low- and high-frequency signals. To overcome limitations in capturing the full spectrum of past temperature variability, we present a network of 15 maximum latewood density (MXD) chronologies distributed across the Northern Hemisphere extratropics. Independent subsets of continental-scale records consistently reveal high MXD before 1580 and after 1910, with below average values between these periods. Reconstructed extratropical summer temperatures reflect not only these long-term trends but also distinct cooling pulses after large volcanic eruptions. In contrast to TRW-dominated reconstructions, this MXD-based record indicates a delayed onset of the Little Ice Age by almost two centuries. The reduced memory inherent in MXD is likely responsible for the rapid recovery from volcanic-induced cooling in the fourteenth century and the continuation of warmer temperatures until ~1600. STUDY NOTES: Annually resolved summer temperature reconstruction for the northern hemisphere midlatitudes. The 15 proxy records are maximum-latewood-density chronologies with a minimum length of 600 years and a significant local summer temperature signal. The proxy composite is scaled against June-August temperatures from the CRUTEM4v network (30-90N).

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/schneider2015temp.txt Data File; Northern Hemisphere Extratropics Summer Temperature Reconstruction GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/schneider2015mxd.txt Data File; Regional Maximum Density Tree-Ring Chronologies USA/NOAA DIF Version 9.8.4 2019-03-01 2019-03-01