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- W2891016557 abstract "Research Article| September 07, 2018 Centennial-scale dynamics of the Southern Hemisphere Westerly Winds across the Drake Passage over the past two millennia Zhengyu Xia; Zhengyu Xia 1Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA Search for other works by this author on: GSW Google Scholar Zicheng Yu; Zicheng Yu 1Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA2School of Geographical Sciences, Northeast Normal University, Changchun 130024, China Search for other works by this author on: GSW Google Scholar Julie Loisel Julie Loisel 3Department of Geography, Texas A&M University, College Station, Texas 77843, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Zhengyu Xia 1Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA Zicheng Yu 1Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA2School of Geographical Sciences, Northeast Normal University, Changchun 130024, China Julie Loisel 3Department of Geography, Texas A&M University, College Station, Texas 77843, USA Publisher: Geological Society of America Received: 21 Feb 2018 Revision Received: 30 Jul 2018 Accepted: 08 Aug 2018 First Online: 07 Sep 2018 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2018 Geological Society of America Geology (2018) 46 (10): 855–858. https://doi.org/10.1130/G40187.1 Article history Received: 21 Feb 2018 Revision Received: 30 Jul 2018 Accepted: 08 Aug 2018 First Online: 07 Sep 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Zhengyu Xia, Zicheng Yu, Julie Loisel; Centennial-scale dynamics of the Southern Hemisphere Westerly Winds across the Drake Passage over the past two millennia. Geology 2018;; 46 (10): 855–858. doi: https://doi.org/10.1130/G40187.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Southern Hemisphere Westerly Winds (SHWW) exert important controls on regional and global climate. Instrumental and reanalysis records indicate strengthening and poleward contraction of the SHWW belt since the late twentieth century. Such changes also have implications for Southern Ocean upwelling and CO2 degassing. Therefore, a better understanding of the long-term SHWW behaviors and dynamics beyond recent decades is critical for projecting future changes. Here, we applied isotope analysis of Sphagnum moss cellulose from a peat bog in southernmost Patagonia (∼54°S) to reconstruct changes in oxygen isotope composition of precipitation (δ18Op) that could elucidate past shifts in moisture sources and trajectories. We interpreted the positive shifts in δ18Op to indicate weaker SHWW and, importantly, more frequent easterly flows that enhance moisture supply sourced from the Atlantic Ocean. In contrast, negative shifts in δ18Op indicate stronger SHWW and intensification of the Andean rain shadow. Our data, along with other evidence from southernmost Patagonia and the Antarctic Peninsula, suggest a coherent pattern of centennial-scale variability in SHWW strength on either side of the Drake Passage over the past two millennia, probably as a teleconnection response to El Niño–Southern Oscillation–like variability. Our study implies that investigations of past changes in the SHWW and associated teleconnection mechanisms should consider synoptic-scale atmospheric circulation patterns, rather than seeing SHWW as a simplistic west-to-east (zonal) wind-flow pattern, particularly on the time scales over which the SHWW express zonal asymmetry among different sectors of the Southern Ocean. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2891016557 title "Centennial-scale dynamics of the Southern Hemisphere Westerly Winds across the Drake Passage over the past two millennia" @default.
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