A new estimate of the Holocene lowstand level of Lake Titicaca, central Andes, and implications for tropical palaeohydrology
New evidence from piston cores and high-resolution seismic reflection data shows that water levels in Lake Titicaca were as much as 100 m below the present level during the early to mid-Holocene (between .6 and 3.8 14 C kyr BP). Climatological and modelling studies indicate that Lake Titicaca rainfa...
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Language: | English |
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Online Access: | http://dx.doi.org/10.1191/095968300671452546 http://journals.sagepub.com/doi/pdf/10.1191/095968300671452546 |
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crsagepubl:10.1191/095968300671452546 2024-09-09T19:43:19+00:00 A new estimate of the Holocene lowstand level of Lake Titicaca, central Andes, and implications for tropical palaeohydrology Cross, Scott L. Baker, Paul A. Seltzer, Geoffrey O. Fritz, Sherilyn C. Dunbar, Robert B. 2000 http://dx.doi.org/10.1191/095968300671452546 http://journals.sagepub.com/doi/pdf/10.1191/095968300671452546 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 10, issue 1, page 21-32 ISSN 0959-6836 1477-0911 journal-article 2000 crsagepubl https://doi.org/10.1191/095968300671452546 2024-08-27T04:22:54Z New evidence from piston cores and high-resolution seismic reflection data shows that water levels in Lake Titicaca were as much as 100 m below the present level during the early to mid-Holocene (between .6 and 3.8 14 C kyr BP). Climatological and modelling studies indicate that Lake Titicaca rainfall depends on convective activity in upwind Amazonia; the lake-level data therefore suggest a drier Amazon Basin during this time. This view is bolstered by an excellent match between the Titicaca lake-level curve and decreased methane concentrations in Greenland ice, previously ascribed to drying of low-latitude wetlands (Blunier et al., 1995). The postglacial history of Lake Titicaca fits a global pattern of lake-level change in the tropics, characterized by opposite phasing between the Southern and Northern Hemispheres. This pattern is most likely the result of orbital controls over the intensity of summer insolation. Article in Journal/Newspaper Greenland SAGE Publications Greenland The Holocene 10 1 21 32 |
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Open Polar |
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SAGE Publications |
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crsagepubl |
language |
English |
description |
New evidence from piston cores and high-resolution seismic reflection data shows that water levels in Lake Titicaca were as much as 100 m below the present level during the early to mid-Holocene (between .6 and 3.8 14 C kyr BP). Climatological and modelling studies indicate that Lake Titicaca rainfall depends on convective activity in upwind Amazonia; the lake-level data therefore suggest a drier Amazon Basin during this time. This view is bolstered by an excellent match between the Titicaca lake-level curve and decreased methane concentrations in Greenland ice, previously ascribed to drying of low-latitude wetlands (Blunier et al., 1995). The postglacial history of Lake Titicaca fits a global pattern of lake-level change in the tropics, characterized by opposite phasing between the Southern and Northern Hemispheres. This pattern is most likely the result of orbital controls over the intensity of summer insolation. |
format |
Article in Journal/Newspaper |
author |
Cross, Scott L. Baker, Paul A. Seltzer, Geoffrey O. Fritz, Sherilyn C. Dunbar, Robert B. |
spellingShingle |
Cross, Scott L. Baker, Paul A. Seltzer, Geoffrey O. Fritz, Sherilyn C. Dunbar, Robert B. A new estimate of the Holocene lowstand level of Lake Titicaca, central Andes, and implications for tropical palaeohydrology |
author_facet |
Cross, Scott L. Baker, Paul A. Seltzer, Geoffrey O. Fritz, Sherilyn C. Dunbar, Robert B. |
author_sort |
Cross, Scott L. |
title |
A new estimate of the Holocene lowstand level of Lake Titicaca, central Andes, and implications for tropical palaeohydrology |
title_short |
A new estimate of the Holocene lowstand level of Lake Titicaca, central Andes, and implications for tropical palaeohydrology |
title_full |
A new estimate of the Holocene lowstand level of Lake Titicaca, central Andes, and implications for tropical palaeohydrology |
title_fullStr |
A new estimate of the Holocene lowstand level of Lake Titicaca, central Andes, and implications for tropical palaeohydrology |
title_full_unstemmed |
A new estimate of the Holocene lowstand level of Lake Titicaca, central Andes, and implications for tropical palaeohydrology |
title_sort |
new estimate of the holocene lowstand level of lake titicaca, central andes, and implications for tropical palaeohydrology |
publisher |
SAGE Publications |
publishDate |
2000 |
url |
http://dx.doi.org/10.1191/095968300671452546 http://journals.sagepub.com/doi/pdf/10.1191/095968300671452546 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
The Holocene volume 10, issue 1, page 21-32 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1191/095968300671452546 |
container_title |
The Holocene |
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10 |
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1 |
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21 |
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32 |
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1809912644320100352 |