The Use and Limitations of Dendrochronology in Studying Effects of Air Pollution on Forests

Persistent Link:
http://hdl.handle.net/10150/303131
Title:
The Use and Limitations of Dendrochronology in Studying Effects of Air Pollution on Forests
Author:
Cook, Edward R.
Affiliation:
Tree-Ring Laboratory, Lamont-Doherty Geological Observatory of Columbia University
Publisher:
Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ)
Issue Date:
May-1985
Description:
Proceedings of Nato Advanced Research Workshop: Effects of Acidic Deposition on Forests, Wetlands, and Agricultural Ecosystems, 12-17 May 1985, Toronto, Canada
URI:
http://hdl.handle.net/10150/303131
Abstract:
The annual ringwidths of trees can be used to search for hypothesized air pollution effects on forests. This search is extremely complicated by the inherent statistical properties of ringwidth data and the high level of uncertainty regarding the sources of variance observed in the ringwidths. A linear aggregate model for ringwidths is described which highlights the general classes of variance which may be found in a tree-ring series. Dendrochronological principles and techniques are described which can be used to create a tree-ring chronology that is suitable for rigorous statistical analysis and hypothesis testing. The need to model climatic influences on tree growth prior to the search for pollution effects is necessary and a method for achieving this is described. Only after the variance due to age trends, stand dynamics effects and climatic influences has been accounted for can any confidence be placed on inferred pollution effects. An analysis of a red spruce tree -ring chronology indicates that a decline in ringwidths since 1968 cannot be explained by a linear temperature response model using monthly climatic variables. However, threshold responses to climate that could be responsible for the decline need to be considered before the anomalous decline can be attributed to non-climatic influences such as pollution.
Language:
en_US

Full metadata record

DC FieldValue Language
dc.contributor.authorCook, Edward R.en_US
dc.date.accessioned2013-10-09T23:48:02Z-
dc.date.available2013-10-09T23:48:02Z-
dc.date.issued1985-05-
dc.identifier.urihttp://hdl.handle.net/10150/303131-
dc.descriptionProceedings of Nato Advanced Research Workshop: Effects of Acidic Deposition on Forests, Wetlands, and Agricultural Ecosystems, 12-17 May 1985, Toronto, Canadaen_US
dc.description.abstractThe annual ringwidths of trees can be used to search for hypothesized air pollution effects on forests. This search is extremely complicated by the inherent statistical properties of ringwidth data and the high level of uncertainty regarding the sources of variance observed in the ringwidths. A linear aggregate model for ringwidths is described which highlights the general classes of variance which may be found in a tree-ring series. Dendrochronological principles and techniques are described which can be used to create a tree-ring chronology that is suitable for rigorous statistical analysis and hypothesis testing. The need to model climatic influences on tree growth prior to the search for pollution effects is necessary and a method for achieving this is described. Only after the variance due to age trends, stand dynamics effects and climatic influences has been accounted for can any confidence be placed on inferred pollution effects. An analysis of a red spruce tree -ring chronology indicates that a decline in ringwidths since 1968 cannot be explained by a linear temperature response model using monthly climatic variables. However, threshold responses to climate that could be responsible for the decline need to be considered before the anomalous decline can be attributed to non-climatic influences such as pollution.en_US
dc.language.isoen_USen_US
dc.publisherLaboratory of Tree-Ring Research, University of Arizona (Tucson, AZ)en_US
dc.rightsCopyright © Arizona Board of Regents. The University of Arizona.en_US
dc.sourceLaboratory of Tree-Ring Research Archives. The University of Arizona.en_US
dc.titleThe Use and Limitations of Dendrochronology in Studying Effects of Air Pollution on Forestsen_US
dc.contributor.departmentTree-Ring Laboratory, Lamont-Doherty Geological Observatory of Columbia Universityen_US
dc.description.collectioninformationThis item is part of the Natural History Reports collection. It was digitized from a physical copy provided by the Laboratory of Tree-Ring Research at The University of Arizona. For more information about items in this collection, please contact the Lab's Curator, (520) 621-1608 or see http://ltrr.arizona.edu/collection.en_US
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