Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years
Diatom, geochemical and isotopic data provide a record of environmental change in Laguna La Gaiba, lowland Bolivia, over the last ca. 25 000 years. High-resolution diatom analysis around the last glacial–interglacial transition provides new insights into this period of change. The full and late glac...
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ftunottingham:oai:eprints.nottingham.ac.uk:28235 2023-09-05T13:21:33+02:00 Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years Metcalfe, S.E. Whitney, B.S. Fitzpatrick, K.A. Mayle, F.E. Loader, N.J. Street-Perrott, F.A. Mann, D.E. 2014 http://eprints.nottingham.ac.uk/28235/ http://onlinelibrary.wiley.com/doi/10.1002/jqs.2702/abstract https://doi.org/10.1002/jqs.2702 unknown Wiley-Blackwell Metcalfe, S.E. and Whitney, B.S. and Fitzpatrick, K.A. and Mayle, F.E. and Loader, N.J. and Street-Perrott, F.A. and Mann, D.E. (2014) Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years. Journal of Quaternary Science, 29 (3). pp. 289-300. ISSN 0267-8179 doi:10.1002/jqs.2702 Article NonPeerReviewed 2014 ftunottingham https://doi.org/10.1002/jqs.2702 2023-08-14T17:33:02Z Diatom, geochemical and isotopic data provide a record of environmental change in Laguna La Gaiba, lowland Bolivia, over the last ca. 25 000 years. High-resolution diatom analysis around the last glacial–interglacial transition provides new insights into this period of change. The full and late glacial lake was generally quite shallow, but with evidence of periodic flooding. At about 13,100 cal a BP, just before the start of the Younger Dryas chronozone, the diatoms indicate shallower water conditions, but there is a marked change at about 12,200 cal a BP indicating the onset of a period of high variability, with rising water levels punctuated by periodic drying. From ca. 11,800 to 10,000 cal a BP stable, deeper water conditions persisted. There is evidence for drying in the early to middle Holocene, but not as pronounced as that reported from elsewhere in the southern hemisphere tropics of South America. This was followed by the onset of wetter conditions in the late Holocene consistent with insolation forcing. Conditions very similar to present were established about 2,100 cal a BP. A complex response to both insolation forcing and millennial scale events originating in the North Atlantic is noted. Article in Journal/Newspaper North Atlantic The University of Nottingham: Nottingham ePrints Gaiba ENVELOPE(24.717,24.717,69.022,69.022) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Journal of Quaternary Science 29 3 289 300 |
institution |
Open Polar |
collection |
The University of Nottingham: Nottingham ePrints |
op_collection_id |
ftunottingham |
language |
unknown |
description |
Diatom, geochemical and isotopic data provide a record of environmental change in Laguna La Gaiba, lowland Bolivia, over the last ca. 25 000 years. High-resolution diatom analysis around the last glacial–interglacial transition provides new insights into this period of change. The full and late glacial lake was generally quite shallow, but with evidence of periodic flooding. At about 13,100 cal a BP, just before the start of the Younger Dryas chronozone, the diatoms indicate shallower water conditions, but there is a marked change at about 12,200 cal a BP indicating the onset of a period of high variability, with rising water levels punctuated by periodic drying. From ca. 11,800 to 10,000 cal a BP stable, deeper water conditions persisted. There is evidence for drying in the early to middle Holocene, but not as pronounced as that reported from elsewhere in the southern hemisphere tropics of South America. This was followed by the onset of wetter conditions in the late Holocene consistent with insolation forcing. Conditions very similar to present were established about 2,100 cal a BP. A complex response to both insolation forcing and millennial scale events originating in the North Atlantic is noted. |
format |
Article in Journal/Newspaper |
author |
Metcalfe, S.E. Whitney, B.S. Fitzpatrick, K.A. Mayle, F.E. Loader, N.J. Street-Perrott, F.A. Mann, D.E. |
spellingShingle |
Metcalfe, S.E. Whitney, B.S. Fitzpatrick, K.A. Mayle, F.E. Loader, N.J. Street-Perrott, F.A. Mann, D.E. Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years |
author_facet |
Metcalfe, S.E. Whitney, B.S. Fitzpatrick, K.A. Mayle, F.E. Loader, N.J. Street-Perrott, F.A. Mann, D.E. |
author_sort |
Metcalfe, S.E. |
title |
Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years |
title_short |
Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years |
title_full |
Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years |
title_fullStr |
Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years |
title_full_unstemmed |
Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years |
title_sort |
hydrology and climatology at laguna la gaiba, lowland bolivia: complex responses to climatic forcings over the last 25,000 years |
publisher |
Wiley-Blackwell |
publishDate |
2014 |
url |
http://eprints.nottingham.ac.uk/28235/ http://onlinelibrary.wiley.com/doi/10.1002/jqs.2702/abstract https://doi.org/10.1002/jqs.2702 |
long_lat |
ENVELOPE(24.717,24.717,69.022,69.022) ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Gaiba Glacial Lake |
geographic_facet |
Gaiba Glacial Lake |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Metcalfe, S.E. and Whitney, B.S. and Fitzpatrick, K.A. and Mayle, F.E. and Loader, N.J. and Street-Perrott, F.A. and Mann, D.E. (2014) Hydrology and climatology at Laguna La Gaiba, lowland Bolivia: complex responses to climatic forcings over the last 25,000 years. Journal of Quaternary Science, 29 (3). pp. 289-300. ISSN 0267-8179 doi:10.1002/jqs.2702 |
op_doi |
https://doi.org/10.1002/jqs.2702 |
container_title |
Journal of Quaternary Science |
container_volume |
29 |
container_issue |
3 |
container_start_page |
289 |
op_container_end_page |
300 |
_version_ |
1776202149388091392 |