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Persistent millennial scale climate variability in the Eastern Tropical North Pacific over the last two glacial cycles 5
Arellano-torres, Elsa; Ganeshram, Raja S.; Pichevin, Laetitia E.; Salas-de-leon, David Alberto.
High-resolution sediment records from the eastern tropical North Pacific (ETNP) spanning the last ~240 ka B.P. were studied to document the nature of millennial-scale climatic events in the tropical Pacific and to investigate teleconnection mechanisms. We present organic carbon (%OC) and diffuse spectral reflectivity records as indicative of upwelling and productivity changes off NW Mexico over the middle to late Pleistocene. The new productivity records document the persistence of abrupt millennial-scale changes over the last two glacial cycles. Detailed spectral and wavelet time series analyses show the predominance of longer climatic cycles (2–6 ka) during the last and the penultimate glacial periods. The persistence of millennial variability during the...
Tipo: Text Palavras-chave: Millennial scale; Last glacial; Penultimate glacial; Time series analyses; Eastern tropical North Pacific.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00270/38153/36272.pdf
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