Persistent Link:
http://hdl.handle.net/10150/302462
Title:
Tree-Ring Evidence for Long-Term Climatic Change: Yosemite National Park
Author:
Graumlich, Lisa J.
Affiliation:
Laboratory of Tree-Ring Research, University of Arizona
Issue Date:
15-Dec-1990
Description:
Final Report Submitted to Yosemite Association
URI:
http://hdl.handle.net/10150/302462
Abstract:
Tree -ring data were collected from two sites within Yosemite National Park: a western juniper stand near Juniper Ridge and a lodgepole pine stand near Gaylor Lakes. Analyses of standardized and prewhitened tree-ring indices from the two sites indicate that at both sites winter (January through March) precipitation is the factor most limiting to tree growth. Using regression analysis a model predicting winter precipitation as a function of tree growth was developed and tested. The model explains 32% of the variance of the precipitation data. While the model is statistically significant, the explanatory (and hence predictive) power of the model could be enhanced by further core collection. When the model is applied to the early portion of the tree -ring record, a reconstruction of precipitation extending back to AD 1620 is obtained. Extended droughts are common in the record and include the following periods: 1650 -1648, 1700 -1720, 1749 -1758, 1807 -1824, 1842- 1851, 1885 -1893, and 1911 -1934. Further funding is being sought to expand the tree-ring data base allowing for more accurate climatic reconstruction and a longer temporal extent of the reconstruction.
Type:
text
Language:
en_US

Full metadata record

DC FieldValue Language
dc.contributor.authorGraumlich, Lisa J.en_US
dc.date.accessioned2013-09-28T00:42:36Z-
dc.date.available2013-09-28T00:42:36Z-
dc.date.issued1990-12-15-
dc.identifier.urihttp://hdl.handle.net/10150/302462-
dc.descriptionFinal Report Submitted to Yosemite Associationen_US
dc.description.abstractTree -ring data were collected from two sites within Yosemite National Park: a western juniper stand near Juniper Ridge and a lodgepole pine stand near Gaylor Lakes. Analyses of standardized and prewhitened tree-ring indices from the two sites indicate that at both sites winter (January through March) precipitation is the factor most limiting to tree growth. Using regression analysis a model predicting winter precipitation as a function of tree growth was developed and tested. The model explains 32% of the variance of the precipitation data. While the model is statistically significant, the explanatory (and hence predictive) power of the model could be enhanced by further core collection. When the model is applied to the early portion of the tree -ring record, a reconstruction of precipitation extending back to AD 1620 is obtained. Extended droughts are common in the record and include the following periods: 1650 -1648, 1700 -1720, 1749 -1758, 1807 -1824, 1842- 1851, 1885 -1893, and 1911 -1934. Further funding is being sought to expand the tree-ring data base allowing for more accurate climatic reconstruction and a longer temporal extent of the reconstruction.en_US
dc.language.isoen_USen_US
dc.rightsCopyright © Arizona Board of Regents. The University of Arizona.en_US
dc.titleTree-Ring Evidence for Long-Term Climatic Change: Yosemite National Parken_US
dc.typetexten_US
dc.contributor.departmentLaboratory of Tree-Ring Research, University of Arizonaen_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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