Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano
Tropical South America is one of the three main centres of the global, zonal overturning circulation of the equatorial atmosphere (generally termed the 'Walker' circulation1). Although this area plays a key role in global climate cycles, little is known about South American climate history...
Published in: | Nature |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Nature Publishing Group
2001
|
Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/35467/ https://oceanrep.geomar.de/id/eprint/35467/1/Baker.pdf https://doi.org/10.1038/35055524 |
id |
ftoceanrep:oai:oceanrep.geomar.de:35467 |
---|---|
record_format |
openpolar |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:35467 2023-05-15T17:29:55+02:00 Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano Baker, P. A. Rigsby, C. A. Seltzer, G. O. Fritz, S. C. Lowenstein, T. K. Bacher, N. P. Veliz, C. 2001 text https://oceanrep.geomar.de/id/eprint/35467/ https://oceanrep.geomar.de/id/eprint/35467/1/Baker.pdf https://doi.org/10.1038/35055524 en eng Nature Publishing Group https://oceanrep.geomar.de/id/eprint/35467/1/Baker.pdf Baker, P. A., Rigsby, C. A., Seltzer, G. O., Fritz, S. C., Lowenstein, T. K., Bacher, N. P. and Veliz, C. (2001) Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano. Nature, 409 (6821). pp. 698-701. DOI 10.1038/35055524 <https://doi.org/10.1038/35055524>. doi:10.1038/35055524 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2001 ftoceanrep https://doi.org/10.1038/35055524 2023-04-07T15:30:09Z Tropical South America is one of the three main centres of the global, zonal overturning circulation of the equatorial atmosphere (generally termed the 'Walker' circulation1). Although this area plays a key role in global climate cycles, little is known about South American climate history. Here we describe sediment cores and down-hole logging results of deep drilling in the Salar de Uyuni, on the Bolivian Altiplano, located in the tropical Andes. We demonstrate that during the past 50,000 years the Altiplano underwent important changes in effective moisture at both orbital (20,000-year) and millennial timescales. Long-duration wet periods, such as the Last Glacial Maximum—marked in the drill core by continuous deposition of lacustrine sediments—appear to have occurred in phase with summer insolation maxima produced by the Earth's precessional cycle. Short-duration, millennial events correlate well with North Atlantic cold events, including Heinrich events 1 and 2, as well as the Younger Dryas episode. At both millennial and orbital timescales, cold sea surface temperatures in the high-latitude North Atlantic were coeval with wet conditions in tropical South America, suggesting a common forcing. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) The Altiplano ENVELOPE(163.917,163.917,-78.133,-78.133) Nature 409 6821 698 701 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Tropical South America is one of the three main centres of the global, zonal overturning circulation of the equatorial atmosphere (generally termed the 'Walker' circulation1). Although this area plays a key role in global climate cycles, little is known about South American climate history. Here we describe sediment cores and down-hole logging results of deep drilling in the Salar de Uyuni, on the Bolivian Altiplano, located in the tropical Andes. We demonstrate that during the past 50,000 years the Altiplano underwent important changes in effective moisture at both orbital (20,000-year) and millennial timescales. Long-duration wet periods, such as the Last Glacial Maximum—marked in the drill core by continuous deposition of lacustrine sediments—appear to have occurred in phase with summer insolation maxima produced by the Earth's precessional cycle. Short-duration, millennial events correlate well with North Atlantic cold events, including Heinrich events 1 and 2, as well as the Younger Dryas episode. At both millennial and orbital timescales, cold sea surface temperatures in the high-latitude North Atlantic were coeval with wet conditions in tropical South America, suggesting a common forcing. |
format |
Article in Journal/Newspaper |
author |
Baker, P. A. Rigsby, C. A. Seltzer, G. O. Fritz, S. C. Lowenstein, T. K. Bacher, N. P. Veliz, C. |
spellingShingle |
Baker, P. A. Rigsby, C. A. Seltzer, G. O. Fritz, S. C. Lowenstein, T. K. Bacher, N. P. Veliz, C. Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano |
author_facet |
Baker, P. A. Rigsby, C. A. Seltzer, G. O. Fritz, S. C. Lowenstein, T. K. Bacher, N. P. Veliz, C. |
author_sort |
Baker, P. A. |
title |
Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano |
title_short |
Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano |
title_full |
Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano |
title_fullStr |
Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano |
title_full_unstemmed |
Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano |
title_sort |
tropical climate changes at millennial and orbital timescales on the bolivian altiplano |
publisher |
Nature Publishing Group |
publishDate |
2001 |
url |
https://oceanrep.geomar.de/id/eprint/35467/ https://oceanrep.geomar.de/id/eprint/35467/1/Baker.pdf https://doi.org/10.1038/35055524 |
long_lat |
ENVELOPE(163.917,163.917,-78.133,-78.133) |
geographic |
The Altiplano |
geographic_facet |
The Altiplano |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/35467/1/Baker.pdf Baker, P. A., Rigsby, C. A., Seltzer, G. O., Fritz, S. C., Lowenstein, T. K., Bacher, N. P. and Veliz, C. (2001) Tropical climate changes at millennial and orbital timescales on the Bolivian Altiplano. Nature, 409 (6821). pp. 698-701. DOI 10.1038/35055524 <https://doi.org/10.1038/35055524>. doi:10.1038/35055524 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1038/35055524 |
container_title |
Nature |
container_volume |
409 |
container_issue |
6821 |
container_start_page |
698 |
op_container_end_page |
701 |
_version_ |
1766125154300067840 |