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A new way of looking at dendroprovenancing: Spatial field correlations of residuals

Bridge, MC; Fowler, AM; (2019) A new way of looking at dendroprovenancing: Spatial field correlations of residuals. Dendrochronologia , 57 , Article 125627. 10.1016/j.dendro.2019.125627. Green open access

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Abstract

A graphical method is used to demonstrate the results of new analytical steps introduced as an aid to provenancing oak within the British Isles. The current method for determining the likely area of origin of a tree-ring series is to map the distribution of t-values obtained when the subject chronology is compared with each of the available reference chronologies. Although useful, this falls into the trap that the t-value itself is subject to variation in length of the series being compared. The first step to overcome this is to instead use the R-value, a common way of characterising inter-site tree-ring relationships. It can be seen however that with dated sites, the geographical spread of well-matching sites is often quite large (the very reason why one can have confidence in the dating). This new method introduces two new steps. The first is to subtract the regional growth signal before comparing the sites. It is then possible to focus on the often more minor local scale variations in growth, the weak relationships previously overwhelmed by the regional signal sometimes becoming apparent using the paired inter-site correlations (residuals). The second step is then introduced, exploiting the information available in these maps. Objectively quantifying the agreement between the spatial correlation fields for a single site is achieved by scoring and mapping the agreement between the inter-site correlation maps for each other site, here termed the ‘field correlation’. It is shown that this sometimes gives an improved indication of the likely area of growth, and can be used in conjunction with any other information available to suggest likely geographical origins with more confidence.

Type: Article
Title: A new way of looking at dendroprovenancing: Spatial field correlations of residuals
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.dendro.2019.125627
Publisher version: https://doi.org/10.1016/j.dendro.2019.125627
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Dendroprovenancing, oak dendrochronology, British Isles
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Institute of Archaeology
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Institute of Archaeology > Institute of Archaeology Gordon Square
URI: https://discovery.ucl.ac.uk/id/eprint/10079950
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