ENSO history recorded in Agathis australis (kauri) tree rings. Part B: 423 years of ENSO robustness

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dc.contributor.author Fowler, Anthony en
dc.date.accessioned 2012-03-08T22:47:12Z en
dc.date.issued 2008 en
dc.identifier.citation International Journal of Climatology 28(1):21-35 2008 en
dc.identifier.issn 0899-8418 en
dc.identifier.uri http://hdl.handle.net/2292/13565 en
dc.description.abstract Part A of this study identified the potential of kauri tree rings for reconstructing the history of past ENSO activity. Plausible indices of multidecadal to centennial-scale ENSO activity (phase dominance and robustness) that could be derived from kauri regional master chronologies are hypothesized here, and they are tested against the instrumental SOI record, using partitioning and graphical analyses. The subset of the indices passing this first screening are then tested for sensitivity to the complex evolving sample depth and site-composition mix that characterizes regional tree-ring chronologies. Corrections for evolving sample depth are developed where possible. The two indices of ENSO activity remaining after these two screening phases (evolving chronology time-series variance and decadal-scale spectral signature) are used to infer 423 years of ENSO robustness and the results are compared to two multiproxy ENSO reconstructions. Results suggest that ENSO robustness (1) peaked in the 20th century, (2) is characterized by persistent 55–80 year cyclicity, (3) was low in the mid-20th century only relative to robust ENSO activity at the beginning and end of that century, (4) reached a pre-20th century peak in the mid-18th century, and (5) was weakest near the beginning of the 19th century. en
dc.publisher Wiley InterScience en
dc.relation.ispartofseries International Journal of Climatology en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0899-8418/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title ENSO history recorded in Agathis australis (kauri) tree rings. Part B: 423 years of ENSO robustness en
dc.type Journal Article en
dc.identifier.doi 10.1002/joc.1479 en
pubs.issue 1 en
pubs.begin-page 21 en
pubs.volume 28 en
dc.rights.holder Copyright: Royal Meteorological Society en
pubs.end-page 35 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 76648 en
pubs.org-id Science en
pubs.org-id School of Environment en
pubs.record-created-at-source-date 2010-09-01 en

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