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Teleconnected ocean forcing of Western North American droughts and pluvials during the last millennium ArchiMer
Routson, Cody C.; Woodhouse, Connie A.; Overpeck, Jonathan T.; Betancourt, Julio L.; Mckay, Nicholas P..
Western North America (WNA) is rich in hydroclimate reconstructions, yet questions remain about the causes of decadal-to-multidecadal hydroclimate variability. Teleconnection patterns preserved in annually-resolved tree-ring reconstructed drought maps, and anomalies in a global network of proxy sea surface temperature (SST) reconstructions, were used to reassess the evidence linking ocean forcing to WNA hydroclimate variability over the past millennium. Potential forcing mechanisms of the Medieval Climate Anomaly (MCA) and individual drought and pluvial events including two multidecadal-length MCA pluvials were evaluated. We show strong teleconnection patterns occurred during the driest (wettest) years within persistent droughts (pluvials), implicating...
Tipo: Text Palavras-chave: Western North America; Drought; Pluvial; Synthesis; Climate change; Multi-proxy.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00496/60719/65283.pdf
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