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Assessing non-linearity in European temperature-sensitive tree-ring data
Stockholms universitet, Historiska institutionen.
Stockholms universitet, Institutionen för naturgeografi.
Vise andre og tillknytning
2020 (engelsk)Inngår i: Dendrochronologia, ISSN 1125-7865, E-ISSN 1612-0051, Vol. 59, artikkel-id 125652Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We test the application of parametric, non-parametric, and semi-parametric calibration models for reconstructing summer (June-August) temperature from a set of tree-ring width and density data on the same dendro samples from 40 sites across Europe. By comparing the performance of the three calibration models on pairs of tree-ring width (TRW) and maximum density (MXD) or maximum blue intensity (MXBI), we test whether a non-linear temperature response is more prevalent in TRW or MXD (MXBI) data, and whether it is associated with the temperature sensitivity and/or autocorrelation structure of the dendro parameters. We note that MXD (MXBI) data have a significantly stronger temperature response than TRW data as well as a lower autocorrelation that is more similar to that of the instrumental temperature data, whereas TRW exhibits a redder variability continuum. This study shows that the use of non-parametric calibration models is more suitable for TRW data, while parametric calibration is sufficient for both MXD and MXBI data - that is, we show that TRW is by far the more non-linear proxy.

sted, utgiver, år, opplag, sider
2020. Vol. 59, artikkel-id 125652
Emneord [en]
Dendroclimatology, Calibration methods, Non-linearities, Tree-ring width, Tree-ring maximum density, Tree-ring maximum blue intensity
HSV kategori
Identifikatorer
URN: urn:nbn:se:polar:diva-8624DOI: 10.1016/j.dendro.2019.125652ISI: 000510466700002OAI: oai:DiVA.org:polar-8624DiVA, id: diva2:1519358
Tilgjengelig fra: 2020-03-25 Laget: 2021-01-18bibliografisk kontrollert

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