Spatial Fingerprint of Younger Dryas Cooling and Warming in Eastern North America
Russell, James M.
Jackson, Stephen T.
Krause, Teresa R.
Marcott, Shaun A.
Williams, John W.
AffiliationDepartment of Geosciences, University of Arizona
MetadataShow full item record
PublisherBlackwell Publishing Ltd
CitationFastovich, D., Russell, J. M., Jackson, S. T., Krause, T. R., Marcott, S. A., & Williams, J. W. (2020). Spatial Fingerprint of Younger Dryas Cooling and Warming in Eastern North America. Geophysical Research Letters, 47(22), e2020GL090031.
JournalGeophysical Research Letters
Rights© 2020. The Authors. This is an open access article under the terms of the Creative Commons Attribution License.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractThe Younger Dryas (YD, 12.9–11.7 ka) is the most recent, near-global interval of abrupt climate change with rates similar to modern global warming. Understanding the causes and biodiversity effects of YD climate changes requires determining the spatial fingerprints of past temperature changes. Here we build pollen-based and branched glycerol dialkyl glycerol tetraether-based temperature reconstructions in eastern North America (ENA) to better understand deglacial temperature evolution. YD cooling was pronounced in the northeastern United States and muted in the north central United States. Florida sites warmed during the YD, while other southeastern sites maintained a relatively stable climate. This fingerprint is consistent with an intensified subtropical high during the YD and demonstrates that interhemispheric responses were more complex spatially in ENA than predicted by the bipolar seesaw model. Reduced-amplitude or antiphased millennial-scale temperature variability in the southeastern United States may support regional hotspots of biodiversity and endemism. © 2020. The Authors.
NoteOpen access journal
VersionFinal published version
SponsorsNational Science Foundation
Except where otherwise noted, this item's license is described as © 2020. The Authors. This is an open access article under the terms of the Creative Commons Attribution License.