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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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