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| Main Authors: | , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
1998
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.859273 |
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| _version_ | 1867169513167912960 |
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| author | Rea, David K Snoeckx, Hilde Joseph, Leah H |
| author_facet | Rea, David K Snoeckx, Hilde Joseph, Leah H |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_859273 |
| institution | PANGAEA |
| language | en |
| publishDate | 1998 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Late Cenozoic eaolian deposits in the North Pacific Rea, David K Snoeckx, Hilde Joseph, Leah H Ocean Drilling Program; ODP 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. |
| title | Late Cenozoic eaolian deposits in the North Pacific |
| topic | Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.859273 |