Persistent Link:
http://hdl.handle.net/10150/191292
Title:
Reconstructing the flow of the Sacramento River since 1560.
Author:
Earle, Christopher J.
Issue Date:
1986
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Tree-ring width time series have been shown to be useful in conjunction with regression techniques for extending instrumental records of climate variables such as precipitation, drought severity and annual streamflow. This study uses tree-ring data derived from 17 sites in northern California and eastern Oregon to develop reconstructions of annual Sacramento River streamflow for the period 1560-1980. Reconstruction methods using principal components analysis (PCA) and autoregressive (AR) modeling are tested and compared. Reconstructions based on both PCA-transformed and untransformed tree-ring data may be superior to reconstructions using only one of these two forms of data. Also, reconstructions using AR modeling of the tree-ring data are found to more accurately reproduce the time series structure of the instrumental streamflow record, but to explain less variance in the data set, than reconstructions which do not use AR modeling. The reconstructed streamflow series shows that the historical period includes the wettest (1854-1916) and driest (1928-1937) periods of the last 400 years, but that many other periods of sustained drought or high flows have also occurred. This reconstruction correlates well with a previous reconstruction of precipitation in California, and shows varying levels of agreement with tree-ring based reconstructions of climate done elsewhere in the western U.S.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Tree-rings.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Geosciences; Graduate College
Degree Grantor:
University of Arizona

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleReconstructing the flow of the Sacramento River since 1560.en_US
dc.creatorEarle, Christopher J.en_US
dc.contributor.authorEarle, Christopher J.en_US
dc.date.issued1986en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractTree-ring width time series have been shown to be useful in conjunction with regression techniques for extending instrumental records of climate variables such as precipitation, drought severity and annual streamflow. This study uses tree-ring data derived from 17 sites in northern California and eastern Oregon to develop reconstructions of annual Sacramento River streamflow for the period 1560-1980. Reconstruction methods using principal components analysis (PCA) and autoregressive (AR) modeling are tested and compared. Reconstructions based on both PCA-transformed and untransformed tree-ring data may be superior to reconstructions using only one of these two forms of data. Also, reconstructions using AR modeling of the tree-ring data are found to more accurately reproduce the time series structure of the instrumental streamflow record, but to explain less variance in the data set, than reconstructions which do not use AR modeling. The reconstructed streamflow series shows that the historical period includes the wettest (1854-1916) and driest (1928-1937) periods of the last 400 years, but that many other periods of sustained drought or high flows have also occurred. This reconstruction correlates well with a previous reconstruction of precipitation in California, and shows varying levels of agreement with tree-ring based reconstructions of climate done elsewhere in the western U.S.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshTree-rings.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGeosciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.identifier.oclc214119377en_US
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