Persistent Link:
http://hdl.handle.net/10150/262287
Title:
Identifying Low-Frequency Tree-Ring Variation
Author:
Sheppard, Paul R.
Affiliation:
Laboratory of Tree-Ring Research, University of Arizona, Tucson, Arizona
Issue Date:
1991
Rights:
Copyright © Tree-Ring Society. All rights reserved.
Collection Information:
This item is part of the Tree-Ring Research (formerly Tree-Ring Bulletin) archive. It was digitized from a physical copy provided by the Laboratory of Tree-Ring research at The University of Arizona. For more information about this peer-reviewed scholarly journal, please email the Editor of Tree-Ring Research at editor@treeringsociety.org.
Publisher:
Tree-Ring Society
Journal:
Tree-Ring Bulletin
Citation:
Sheppard, P.R. 1991. Identifying low-frequency tree-ring variation. Tree-Ring Bulletin 51:29-38.
Abstract:
I propose an approach to provide 95% confidence intervals for a chronology of low-frequency tree-ring variation so that a level of significance or importance for trends can be inferred. The approach also visually reveals the portions of a chronology in which sample depth is so poor that low-frequency variation is not robustly estimated. A key characteristic of the approach is that it is essentially a reordering of the individual steps commonly used in constructing standard tree-ring chronologies; consequently, it is computationally simple for researchers who already routinely construct standard tree-ring chronologies. The most important ramification of the approach is that each year of the chronology has a distribution of smoothed index values with which to estimate confidence intervals around the chronology of low-frequency variation. It can be argued that the approach constitutes multiple significance testing of means, which causes the α level for the confidence interval to be unknown. Nonetheless, the approach is still useful in that it provides a way to evaluate the probable importance of low-frequency trends expressed in tree-ring chronologies.
Keywords:
Dendrochronology; Tree Rings; Growth Rings; Statistical Analysis
ISSN:
0041-2198
Additional Links:
http://www.treeringsociety.org

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleIdentifying Low-Frequency Tree-Ring Variationen_US
dc.contributor.authorSheppard, Paul R.en_US
dc.contributor.departmentLaboratory of Tree-Ring Research, University of Arizona, Tucson, Arizonaen_US
dc.date.issued1991-
dc.rightsCopyright © Tree-Ring Society. All rights reserved.en_US
dc.description.collectioninformationThis item is part of the Tree-Ring Research (formerly Tree-Ring Bulletin) archive. It was digitized from a physical copy provided by the Laboratory of Tree-Ring research at The University of Arizona. For more information about this peer-reviewed scholarly journal, please email the Editor of Tree-Ring Research at editor@treeringsociety.org.en_US
dc.publisherTree-Ring Societyen_US
dc.identifier.journalTree-Ring Bulletinen_US
dc.identifier.citationSheppard, P.R. 1991. Identifying low-frequency tree-ring variation. Tree-Ring Bulletin 51:29-38.en_US
dc.description.abstractI propose an approach to provide 95% confidence intervals for a chronology of low-frequency tree-ring variation so that a level of significance or importance for trends can be inferred. The approach also visually reveals the portions of a chronology in which sample depth is so poor that low-frequency variation is not robustly estimated. A key characteristic of the approach is that it is essentially a reordering of the individual steps commonly used in constructing standard tree-ring chronologies; consequently, it is computationally simple for researchers who already routinely construct standard tree-ring chronologies. The most important ramification of the approach is that each year of the chronology has a distribution of smoothed index values with which to estimate confidence intervals around the chronology of low-frequency variation. It can be argued that the approach constitutes multiple significance testing of means, which causes the α level for the confidence interval to be unknown. Nonetheless, the approach is still useful in that it provides a way to evaluate the probable importance of low-frequency trends expressed in tree-ring chronologies.en_US
dc.subjectDendrochronologyen_US
dc.subjectTree Ringsen_US
dc.subjectGrowth Ringsen_US
dc.subjectStatistical Analysisen_US
dc.identifier.citationSheppard, P.R. 1991. Identifying low-frequency tree-ring variation. Tree-Ring Bulletin 51:29-38.en_US
dc.identifier.issn0041-2198-
dc.identifier.urihttp://hdl.handle.net/10150/262287-
dc.identifier.journalTree-Ring Bulletinen_US
dc.typeArticleen_US
dc.relation.urlhttp://www.treeringsociety.orgen_US
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