Paleoclimatic Analyses of Tree-Ring Reconstructed Summer Drought in the United States, 1700-1978

Persistent Link:
http://hdl.handle.net/10150/262556
Title:
Paleoclimatic Analyses of Tree-Ring Reconstructed Summer Drought in the United States, 1700-1978
Author:
Fye, Falko K.; Cleaveland, Malcolm K.
Affiliation:
Department of Geosciences, University of Arkansas at Fayetteville, Fayetteville, AR
Issue Date:
2001
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 Research
Citation:
Fye, F.K., Cleaveland, M.K. 2001. Paleoclimatic analyses of tree-ring reconstructed summer drought in the United States, 1700-1978. Tree-Ring Research 57(1):31-44.
Abstract:
A 155-point US grid of tree-ring reconstructed summer (JJA; Cook et al. 1996) averaged Palmer Drought Severity Index (PDSI) was used to document the history and investigate the external forcing of growingseason climate anomalies for the period 1700 to 1978. Statistical analysis software was used to composite years temporally by computing averages for the years of known dates of major potential climate-forcing events. A geographic information system (GIS) was used to display the composites as well as individual years. The forcing factors investigated were the 22-year Hale solar magnetic cycle, major El Niño (warm) and La Niña (cold) events based on the Southern Oscillation Index (SOI), and large magnitude low latitude volcanic eruptions. Positive and negative moisture anomalies appear around Iowa in the alternate 11-year sunspot cycles that make up the Hale solar magnetic cycle. Experimentation with the grouping of years in the Hale cycle composites led to unexplained spatial shifts of the moisture anomalies in the same region. The El Niño episodes usually show positive (wet) PDSI anomalies in the Southwest from California to Texas, while La Niña events usually have drought in the same area, with some inconsistent signals in the north central Plains and the Northwest. The eastern and northern US were unaffected by the Southern Oscillation, although the summer season reconstructed PDSI may have missed the SOI variation, which is primarily a winter signal. The three largest tropical volcanic eruptions since 1800 failed to follow a consistent pattern, but the 1815 eruption of Tambora in Indonesia was followed by a very strong positive growth anomaly in the Southwest in 1816 and 1817. Important regional studies with the winter-spring season could be done with this network of tree-ring chronologies and observed monthly PDSI data.
Keywords:
Dendrochronology; Tree Rings
ISSN:
2162-4585; 1536-1098
Additional Links:
http://www.treeringsociety.org

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titlePaleoclimatic Analyses of Tree-Ring Reconstructed Summer Drought in the United States, 1700-1978en_US
dc.contributor.authorFye, Falko K.en_US
dc.contributor.authorCleaveland, Malcolm K.en_US
dc.contributor.departmentDepartment of Geosciences, University of Arkansas at Fayetteville, Fayetteville, ARen_US
dc.date.issued2001-
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 Researchen_US
dc.identifier.citationFye, F.K., Cleaveland, M.K. 2001. Paleoclimatic analyses of tree-ring reconstructed summer drought in the United States, 1700-1978. Tree-Ring Research 57(1):31-44.en_US
dc.description.abstractA 155-point US grid of tree-ring reconstructed summer (JJA; Cook et al. 1996) averaged Palmer Drought Severity Index (PDSI) was used to document the history and investigate the external forcing of growingseason climate anomalies for the period 1700 to 1978. Statistical analysis software was used to composite years temporally by computing averages for the years of known dates of major potential climate-forcing events. A geographic information system (GIS) was used to display the composites as well as individual years. The forcing factors investigated were the 22-year Hale solar magnetic cycle, major El Niño (warm) and La Niña (cold) events based on the Southern Oscillation Index (SOI), and large magnitude low latitude volcanic eruptions. Positive and negative moisture anomalies appear around Iowa in the alternate 11-year sunspot cycles that make up the Hale solar magnetic cycle. Experimentation with the grouping of years in the Hale cycle composites led to unexplained spatial shifts of the moisture anomalies in the same region. The El Niño episodes usually show positive (wet) PDSI anomalies in the Southwest from California to Texas, while La Niña events usually have drought in the same area, with some inconsistent signals in the north central Plains and the Northwest. The eastern and northern US were unaffected by the Southern Oscillation, although the summer season reconstructed PDSI may have missed the SOI variation, which is primarily a winter signal. The three largest tropical volcanic eruptions since 1800 failed to follow a consistent pattern, but the 1815 eruption of Tambora in Indonesia was followed by a very strong positive growth anomaly in the Southwest in 1816 and 1817. Important regional studies with the winter-spring season could be done with this network of tree-ring chronologies and observed monthly PDSI data.en_US
dc.subjectDendrochronologyen_US
dc.subjectTree Ringsen_US
dc.identifier.citationFye, F.K., Cleaveland, M.K. 2001. Paleoclimatic analyses of tree-ring reconstructed summer drought in the United States, 1700-1978. Tree-Ring Research 57(1):31-44.en_US
dc.identifier.issn2162-4585-
dc.identifier.issn1536-1098-
dc.identifier.urihttp://hdl.handle.net/10150/262556-
dc.identifier.journalTree-Ring Researchen_US
dc.typeArticleen_US
dc.relation.urlhttp://www.treeringsociety.orgen_US
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