View Item 
      •   Home
      • 2. Research Centres and Institutes
      • Earth Observatory of Singapore (EOS)
      • EOS Journal Articles
      • View Item
      •   Home
      • 2. Research Centres and Institutes
      • Earth Observatory of Singapore (EOS)
      • EOS Journal Articles
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.
      Subject Lookup

      Browse

      All of DR-NTUCommunities & CollectionsTitlesAuthorsBy DateSubjectsThis CollectionTitlesAuthorsBy DateSubjects

      My Account

      Login

      Statistics

      Most Popular ItemsStatistics by CountryMost Popular Authors

      About DR-NTU

      Abrupt variations in South American monsoon rainfall during the Holocene based on a speleothem record from central-eastern Brazil

      Thumbnail
      Author
      Stríkis, Nicolás M.
      Cruz, Francisco W.
      Cheng, Hai
      Karmann, Ivo
      Edwards, R. Lawrence
      Vuille, Mathias
      Wang, Xianfeng
      de Paula, Marcos S.
      Novello, Valdir F.
      Auler, Augusto S.
      Date of Issue
      2011
      Abstract
      Well-dated high-resolution oxygen isotope records of speleothems in central-eastern Brazil spanning from 1.3 to 10.2 kyr B.P. reveal that the occurrence of abrupt variations in monsoon precipitation is not random. They show a striking match with Bond events and a significant pacing at ∼800 yr, a dominant periodicity present in sea surface temperature records from both the North Atlantic and equatorial Pacific Oceans that is possibly related to periods of low solar activity (high 14C based on the atmospheric Δ14C record). The precipitation variations over central-eastern Brazil are broadly antiphased with the Asian and Indian Monsoons during Bond events and show marked differences in duration and structure between the early and late Holocene. Our results suggest that these abrupt multicentennial precipitation events are primarily linked to changes in the North Atlantic meridional overturning circulation (AMOC). Anomalous cross-equatorial flow induced by negative AMOC phases may have modulated not only the monsoon in South America but also affected El Niño−like conditions in the tropical Pacific during the Holocene.
      Subject
      DRNTU::Science::Geology
      Type
      Journal Article
      Series/Journal Title
      Geology
      Rights
      © 2011 Geological Society of America.
      Collections
      • EOS Journal Articles
      http://dx.doi.org/10.1130/G32098.1
      Get published version (via Digital Object Identifier)

      Show full item record


      NTU Library, Nanyang Avenue, Singapore 639798 © 2011 Nanyang Technological University. All rights reserved.
      DSpace software copyright © 2002-2015  DuraSpace
      Contact Us | Send Feedback
      Share |    
      Theme by 
      Atmire NV
       

       


      NTU Library, Nanyang Avenue, Singapore 639798 © 2011 Nanyang Technological University. All rights reserved.
      DSpace software copyright © 2002-2015  DuraSpace
      Contact Us | Send Feedback
      Share |    
      Theme by 
      Atmire NV
       

       

      DCSIMG