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Reduced-dimension reconstruction of the equatorial Pacific SST and zonal wind fields over the past 10,000years using Mg/Ca and alkenone records ArchiMer
Gill, Emily C.; Rajagopalan, Balaji; Molnar, Peter; Marchitto, Thomas M..
We develop a multiproxy, reduced-dimension methodology to blend magnesium-calcium (Mg/Ca) and alkenone (U 37k) paleo sea surface temperature (SST) records from the eastern and western equatorial Pacific, to recreate snapshots of full field SSTs and zonal winds from 10 to 2ka B.P. in 2000year increments. Single-proxy reconstructions (Mg/Ca only versus U 37K only) reveal differences in the timing and duration of maximum cooling across the east-central equatorial Pacific. The largest zonal temperature differences (average west Pacific SST minus average east Pacific SST) occur at 6ka B.P. for the Mg/Ca-only reconstruction (0.61 degrees C) and at 10 and 4ka for the U 37K-only reconstruction (0.55 degrees C and 0.47 degrees C, respectively). Disagreements...
Tipo: Text Palavras-chave: Sea surface temperatures; ENSO; Holocene; Multiproxy field reconstruction; Equatorial Pacific; Reduced-dimension.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00421/53232/54785.pdf
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Plate tectonic and palaeomagnetic implications for the age of the Deccan Traps and the magnetic anomaly time scale ArchiMer
Molnar, Peter; Francheteau, Jean.
IF reconstructions of plate tectonic movement based on magnetic anomaly data are found to be inconsistent with reconstructions based on palaeomagnetic data (see refs 1-3) it may indicate that one or more of the basic assumptions of the plate tectonic model is erroneous : the age or identification of a particular anomaly may be incorrect, the pole positions or sample ages may be unreliable or there may be an error in assessing plate rigidity. We present an example of inconsistency between the two types of data and explore its implications for the chronology of magnetic reversals during the late Cretaceous and early Tertiary and for the age of the Deccan Traps. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1975 URL: http://archimer.ifremer.fr/doc/1975/publication-4985.pdf
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The Relative Motion of 'Hot Spots' in the Atlantic and Indian Oceans During the Cenozoic ArchiMer
Molnar, Peter; Francheteau, Jean.
Reconstructions of the Greenland, Eurasia, North America, Africa, South America and India plates to their relative position at the times of anomalies 13 (38 My) and 24 (60 My) imply relative motion of about 10-20 mm/yr among the principal ' hot-spots ' in the Atlantic and Indian Oceans during the Cenozoic. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1975 URL: http://archimer.ifremer.fr/doc/1975/publication-5082.pdf
Registros recuperados: 3
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