Late Cenozoic eaolian deposits in the North Pacific, supplement to: Rea, David K; Snoeckx, Hilde; Joseph, Leah H (1998): Late Cenozoic Eolian deposition in the North Pacific: Asian drying, Tibetan uplift, and cooling of the northern hemisphere. Paleoceanography, 13(3), 215-224

DOI

A newly constructed record of eolian dust accumulation from the central North Pacific shows that dust deposition increased by an order of magnitude quite rapidly at 3.6 Ma. We associate this sudden drying with the uplift of at least the northern portion of the Tibetan Plateau, shutting off the Indian Ocean moisture source to central and western China. This ten-fold increase in atmospheric dust loading appears to be associated with the 1-m.y.-long shift toward heavy d18O values that occurred at 3.6-2.6 Ma. The dust grain-size record of wind intensity begins its late Cenozoic coarsening a million years before the drying event, at ~4.5 Ma. The northern hemisphere cooling that results in intensification of the subpolar westerly winds may have as its ultimate cause the drawdown of atmospheric CO2 in the latest Miocene and the early Pliocene closing of the Panamanian Seaway.

Identifier
DOI http://dx.doi.org/doi:10.1594/PANGAEA.859273
Metadata Access http://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite3&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.859273
Provenance
Creator Rea, David K;Snoeckx, Hilde;Joseph, Leah H
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 1998
Rights Creative Commons Attribution 3.0 Unported (CC-BY)
Representation
Language English
Resource Type Supplementary Collection of Datasets
Format application/zip
Coverage
Discipline Earth System Research
Spatial Coverage (45N-45N,168E-168W)
Temporal Point 1992-04-09T11:59:59Z