An 85-ka record of climate change in lowland Central America
Drill cores obtained from Lake Petén Itzá, Petén, Guatemala, contain a not, vert, similar85-kyr record of terrestrial climate from lowland Central America that was used to reconstruct hydrologic changes in the northern Neotropics during the last glaciation. Sediments are composed of alternating clay...
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:383 2023-05-15T16:30:25+02:00 An 85-ka record of climate change in lowland Central America Hodell, D. A. Anselmetti, F. S. Ariztegui, D. Brenner, M. Curtis, J. H. Gilli, A. Grzesik, D. A. Guilderson, T. J. Muller, A. D. Bush, M. B. Correa-Metrio, A. Escobar, J. Kutterolf, S. 2008 application/pdf http://eprints.esc.cam.ac.uk/383/ http://eprints.esc.cam.ac.uk/383/1/Hodell_Quat_Sci_Rev_27_2008.pdf https://doi.org/10.1016/j.quascirev.2008.02.008 en eng http://eprints.esc.cam.ac.uk/383/1/Hodell_Quat_Sci_Rev_27_2008.pdf Hodell, D. A. and Anselmetti, F. S. and Ariztegui, D. and Brenner, M. and Curtis, J. H. and Gilli, A. and Grzesik, D. A. and Guilderson, T. J. and Muller, A. D. and Bush, M. B. and Correa-Metrio, A. and Escobar, J. and Kutterolf, S. (2008) An 85-ka record of climate change in lowland Central America. Quaternary Science Reviews, 27 (11-12). pp. 1152-1165. ISSN 0277-3791 DOI https://doi.org/10.1016/j.quascirev.2008.02.008 <https://doi.org/10.1016/j.quascirev.2008.02.008> 01 - Climate Change and Earth-Ocean Atmosphere Systems Article PeerReviewed 2008 ftucambridgeesc https://doi.org/10.1016/j.quascirev.2008.02.008 2020-08-27T18:08:30Z Drill cores obtained from Lake Petén Itzá, Petén, Guatemala, contain a not, vert, similar85-kyr record of terrestrial climate from lowland Central America that was used to reconstruct hydrologic changes in the northern Neotropics during the last glaciation. Sediments are composed of alternating clay and gypsum reflecting relatively wet and dry climate conditions, respectively. From not, vert, similar85 to 48 ka, sediments were dominated by carbonate clay indicating moist conditions during Marine Isotope Stages (MIS) 5a, 4, and early 3. The first gypsum layer was deposited at not, vert, similar48 ka, signifying a shift toward drier hydrologic conditions and the onset of wet–dry oscillations. During the latter part of MIS 3, Petén climate varied between wetter conditions during interstadials and drier states during stadials. The pattern of clay–gypsum (wet–dry) oscillations during the latter part of MIS 3 (not, vert, similar48–23 ka) closely resembles the temperature records from Greenland ice cores and North Atlantic marine sediment cores and precipitation proxies from the Cariaco Basin. The most arid periods coincided with Heinrich Events when cold sea surface temperatures prevailed in the North Atlantic, meridional overturning circulation was reduced, and the Intertropical Convergence Zone (ITCZ) was displaced southward. A thick clay unit was deposited from 23 to 18 ka suggesting deposition in a deep lake, and pollen accumulated during the same period indicates vegetation consisted of a temperate pine-oak forest. This finding contradicts previous inferences that climate was arid during the Last Glacial Maximum (LGM) chronozone (21±2 ka). At not, vert, similar18 ka, Petén climate switched from moist to arid conditions and remained dry from 18 to 14.7 ka during the early deglaciation. Moister conditions prevailed during the warmer Bolling–Allerod (14.7–12.8 ka) with the exception of a brief return to dry conditions at not, vert, similar13.8 ka that coincides with the Older Dryas and meltwater pulse 1A. The onset of the Younger Dryas at 12.8 ka marked the return of gypsum and hence dry conditions. The lake continued to precipitate gypsum until not, vert, similar10.3 ka when rainfall increased markedly in the early Holocene. Article in Journal/Newspaper Greenland Greenland ice cores North Atlantic University of Cambridge, Department of Earth Sciences: ESC Publications Greenland Quaternary Science Reviews 27 11-12 1152 1165 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems Hodell, D. A. Anselmetti, F. S. Ariztegui, D. Brenner, M. Curtis, J. H. Gilli, A. Grzesik, D. A. Guilderson, T. J. Muller, A. D. Bush, M. B. Correa-Metrio, A. Escobar, J. Kutterolf, S. An 85-ka record of climate change in lowland Central America |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
description |
Drill cores obtained from Lake Petén Itzá, Petén, Guatemala, contain a not, vert, similar85-kyr record of terrestrial climate from lowland Central America that was used to reconstruct hydrologic changes in the northern Neotropics during the last glaciation. Sediments are composed of alternating clay and gypsum reflecting relatively wet and dry climate conditions, respectively. From not, vert, similar85 to 48 ka, sediments were dominated by carbonate clay indicating moist conditions during Marine Isotope Stages (MIS) 5a, 4, and early 3. The first gypsum layer was deposited at not, vert, similar48 ka, signifying a shift toward drier hydrologic conditions and the onset of wet–dry oscillations. During the latter part of MIS 3, Petén climate varied between wetter conditions during interstadials and drier states during stadials. The pattern of clay–gypsum (wet–dry) oscillations during the latter part of MIS 3 (not, vert, similar48–23 ka) closely resembles the temperature records from Greenland ice cores and North Atlantic marine sediment cores and precipitation proxies from the Cariaco Basin. The most arid periods coincided with Heinrich Events when cold sea surface temperatures prevailed in the North Atlantic, meridional overturning circulation was reduced, and the Intertropical Convergence Zone (ITCZ) was displaced southward. A thick clay unit was deposited from 23 to 18 ka suggesting deposition in a deep lake, and pollen accumulated during the same period indicates vegetation consisted of a temperate pine-oak forest. This finding contradicts previous inferences that climate was arid during the Last Glacial Maximum (LGM) chronozone (21±2 ka). At not, vert, similar18 ka, Petén climate switched from moist to arid conditions and remained dry from 18 to 14.7 ka during the early deglaciation. Moister conditions prevailed during the warmer Bolling–Allerod (14.7–12.8 ka) with the exception of a brief return to dry conditions at not, vert, similar13.8 ka that coincides with the Older Dryas and meltwater pulse 1A. The onset of the Younger Dryas at 12.8 ka marked the return of gypsum and hence dry conditions. The lake continued to precipitate gypsum until not, vert, similar10.3 ka when rainfall increased markedly in the early Holocene. |
format |
Article in Journal/Newspaper |
author |
Hodell, D. A. Anselmetti, F. S. Ariztegui, D. Brenner, M. Curtis, J. H. Gilli, A. Grzesik, D. A. Guilderson, T. J. Muller, A. D. Bush, M. B. Correa-Metrio, A. Escobar, J. Kutterolf, S. |
author_facet |
Hodell, D. A. Anselmetti, F. S. Ariztegui, D. Brenner, M. Curtis, J. H. Gilli, A. Grzesik, D. A. Guilderson, T. J. Muller, A. D. Bush, M. B. Correa-Metrio, A. Escobar, J. Kutterolf, S. |
author_sort |
Hodell, D. A. |
title |
An 85-ka record of climate change in lowland Central America |
title_short |
An 85-ka record of climate change in lowland Central America |
title_full |
An 85-ka record of climate change in lowland Central America |
title_fullStr |
An 85-ka record of climate change in lowland Central America |
title_full_unstemmed |
An 85-ka record of climate change in lowland Central America |
title_sort |
85-ka record of climate change in lowland central america |
publishDate |
2008 |
url |
http://eprints.esc.cam.ac.uk/383/ http://eprints.esc.cam.ac.uk/383/1/Hodell_Quat_Sci_Rev_27_2008.pdf https://doi.org/10.1016/j.quascirev.2008.02.008 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores North Atlantic |
genre_facet |
Greenland Greenland ice cores North Atlantic |
op_relation |
http://eprints.esc.cam.ac.uk/383/1/Hodell_Quat_Sci_Rev_27_2008.pdf Hodell, D. A. and Anselmetti, F. S. and Ariztegui, D. and Brenner, M. and Curtis, J. H. and Gilli, A. and Grzesik, D. A. and Guilderson, T. J. and Muller, A. D. and Bush, M. B. and Correa-Metrio, A. and Escobar, J. and Kutterolf, S. (2008) An 85-ka record of climate change in lowland Central America. Quaternary Science Reviews, 27 (11-12). pp. 1152-1165. ISSN 0277-3791 DOI https://doi.org/10.1016/j.quascirev.2008.02.008 <https://doi.org/10.1016/j.quascirev.2008.02.008> |
op_doi |
https://doi.org/10.1016/j.quascirev.2008.02.008 |
container_title |
Quaternary Science Reviews |
container_volume |
27 |
container_issue |
11-12 |
container_start_page |
1152 |
op_container_end_page |
1165 |
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1766020149841756160 |