A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe

Wiles, G. C.;DArrigo, R. D.;Barclay, D.;Wilson, R. S.;Jarvis, S. K.;Vargo, L.;Frank, D.

Surface air temperature variability reconstructed with tree rings for the Gulf of Alaska over the past 1200 years

Hughes, M.K.;Touchan, R.;Funkhouser, G.;Vaganov, E.A.;Shiyatov, S.

Twentieth-century summer warmth in northern Yakutia in a 600-year context

No low frequency;updated detrending in DArrigo et al. (2006) but data not available. Likely divergence issues but the only existing record from northeastern Siberia so it must be used to increase coverage.(FCL)

individually detrended, exponential or linear

; climateInterpretation_seasonality changed - was originally 6/7/2016; climateInterpretation_seasonality changed - was originally 6/7/2016

Zhang, P., Linderholm, H., Gunnarson, B., Björklund, J., Chen, D.,

1200 years of warm-season temperature variability in central Fennoscandia inferred from tree-ring

Zhang, Peng;Linderholm, Hans W.;Gunnarson, Björn E.;Björklund, Jesper;Chen, Deliang

1200 years of warm-season temperature variability in central Scandinavia inferred from tree-ring density

Improvement and extension of Gunnarson2011 (Arc_13)

; paleoData_units changed - was originally MXD Z-scores

Björklund, Jesper A.;Gunnarson, Björn E.;Krusic, Paul J.;Grudd, Håkan;Josefsson, Torbjörn;Östlund, Lars;Linderholm, Hans W.

Advances towards improved low-frequency tree-ring reconstructions, using an updated Pinus sylvestris L. MXD network from the Scandinavian Mountains

Δdensity = MXD - minimum density, more focused summer temp. signal than MXD (Björklund et al., 2014, CP, doi:10.5194/cp-10-877-2014)

; climateInterpretation_seasonality changed - was originally 7/8/2009; climateInterpretation_seasonality changed - was originally 7/8/2009

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.