The Meteorological Significance Of False Rings In Eastern Redcedar (Juniperus Virginiana L.) From The Southern Great Plains, U.S.A.
AuthorEdmondson, Jesse R.
AffiliationTree-Ring Laboratory, University of Arkansas, Department of Geosciences
Southern Great Plains
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Collection InformationThis item is part of the Tree-Ring Research (formerly Tree-Ring Bulletin) archive. For more information about this peer-reviewed scholarly journal, please email the Editor of Tree-Ring Research at firstname.lastname@example.org.
CitationEdmondson, J.R., 2010. The meteorological significance of false rings in eastern redcedar (Juniperus virginiana L.) from the Southern Great Plains. Tree-Ring Research 66(1):19-33.
AbstractThe growth rings of eastern redcedar (Juniperus virginiana L.) often contain a high frequency of false intra-annual growth bands, which complicates the dendrochronology of this species. However, exactly dated false rings replicated among many trees can reflect major weather changes during the growing season. Sixty-one trees from two sites (Oklahoma and Kansas) were dated and used to compile replicated chronologies of false rings at both locations extending from AD 1700–2000. False-ring events during the modern instrumental era were compared with the daily weather data from nearby stations. Significant false-ring events occurred at both locations during years that experienced a dramatic late-growing season weather reversal, when an extended period of high temperatures and drought was followed by prolonged cool and wet conditions. Synoptic weather maps for these events indicate that all ten replicated false-ring events in the instrumental era occurred during the highly unseasonable penetration of a cold front into the region. However, none of the significant false-ring events occurred in the same year at both sites. These separate false-ring chronologies indicate that there may be phenological differences in the timing of radial growth in redcedar between Kansas and Oklahoma, and that the weather conditions responsible for false-ring formation often occur at the mesoscale and do not often impact central Kansas and northcentral Oklahoma simultaneously.