Paired oxygen isotope records reveal modern North American atmospheric dynamics during the Holocene

Zhongfang Liu, Kei Yoshimura, Gabriel J. Bowen (), Nikolaus H. Buenning, Camille Risi, Jeffrey M. Welker and Fasong Yuan
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Zhongfang Liu: Tianjin Key Laboratory of Water Resource and Environment, Tianjin Normal University
Kei Yoshimura: Atmosphere and Ocean Research Institute, University of Tokyo
Gabriel J. Bowen: University of Utah
Nikolaus H. Buenning: University of Southern California
Camille Risi: Laboratoire de Météorologie Dynamique, Institut Pierre Simon LaPlace, Centre National de la Recherche Scientifique
Jeffrey M. Welker: University of Alaska Anchorage
Fasong Yuan: Geological, and Environmental Sciences, Cleveland State University

Nature Communications, 2014, vol. 5, issue 1, 1-7

Abstract: Abstract The Pacific North American (PNA) teleconnection has a strong influence on North American climate. Instrumental records and century-scale reconstructions indicate an accelerating tendency towards the positive PNA state since the mid-1850s, but much less is known about long-term PNA variability. Here we reconstruct PNA-like climate variability during the mid- and late Holocene using paired oxygen isotope records from two regions in North America with robust, anticorrelated isotopic response to the modern PNA. We identify mean states of more negative and positive PNA-like climate during the mid- and late Holocene, respectively. Superimposed on the secular change between states is a robust, quasi-200-year oscillation, which we associate with the de Vries solar cycle. These findings suggest the persistence of PNA-like climate variability throughout the mid- and late Holocene, provide evidence for modulation of PNA over multiple timescales and may help researchers de-convolve PNA pattern variation from other factors reflected in palaeorecords.

Date: 2014
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DOI: 10.1038/ncomms4701

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