title: Paired oxygen isotope records reveal modern North American atmospheric dynamics during the Holocene.
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.
authors.affiliation: 1] Tianjin Key Laboratory of Water Resource and Environment, Tianjin Normal University, Tianjin 300387, China [2] Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8568, Japan.
authors.forename: Zhongfang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8568, Japan.
authors.forename: Kei
authors.initials: K
authors.lastname: Yoshimura
authors.affiliation: Department of Geology and Geophysics and Global Change and Sustainability Center, University of Utah, Salt Lake City, Utah 84112, USA.
authors.forename: Gabriel J
authors.initials: GJ
authors.lastname: Bowen
authors.affiliation: Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA.
authors.forename: Nikolaus H
authors.initials: NH
authors.lastname: Buenning
authors.affiliation: Laboratoire de Météorologie Dynamique, Institut Pierre Simon LaPlace, Centre National de la Recherche Scientifique, 75252 Paris, France.
authors.forename: Camille
authors.initials: C
authors.lastname: Risi
authors.affiliation: Department of Biological Sciences, University of Alaska Anchorage, Anchorage, Alaska 99508, USA.
authors.forename: Jeffrey M
authors.initials: JM
authors.lastname: Welker
authors.affiliation: Department of Biological, Geological, and Environmental Sciences, Cleveland State University, 2121 Euclid Ave, Cleveland, Ohio 44115, USA.
authors.forename: Fasong
authors.initials: F
authors.lastname: Yuan
mesh_terms: D001272:Atmosphere / Q000737:chemistry*; D049690:History, Ancient; D008962:Models, Theoretical; D009656:North America; D010103:Oxygen Isotopes / Q000032:analysis*; D011891:Rain; D019445:Solar Activity
chemical_list: D010103:Oxygen Isotopes