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Revising midlatitude summer temperatures back to A.D. 600 based on a wood density network
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2015 (engelsk)Inngår i: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 42, nr 11, s. 4556-4562Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
2015. Vol. 42, nr 11, s. 4556-4562
Emneord [en]
Paleoclimatology, Climate change and variability, Dendrochronology, Continental climate records, Volcano/climate interactions, maximum latewood density, tree rings, millennial reconstruction, volcanic cooling, Little Ice Age, beta value
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Identifikatorer
URN: urn:nbn:se:polar:diva-4024DOI: 10.1002/2015GL063956OAI: oai:DiVA.org:polar-4024DiVA, id: diva2:1169161
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2015GL063956

Tilgjengelig fra: 2017-12-22 Laget: 2017-12-22 Sist oppdatert: 2017-12-22

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Forlagets fullteksthttp://dx.doi.org/10.1002/2015GL063956
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