A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina
Climatic changes are reflected in variations of different parameters. Sequences of lake sediments are good sources of this information because they provide continuous and detailed records of palaeoclimatic changes. In order to determine the changes in climate in SE Pampas plain,in this paper we pres...
Published in: | Geofísica Internacional |
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Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
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Online Access: | http://hdl.handle.net/11336/7633 |
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ftconicet:oai:ri.conicet.gov.ar:11336/7633 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
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English |
topic |
PALEOCLIMATIC CHANGES ROCK MAGNETISM SEDIMENT CORES SOUTH AMERICA LAKE LEVEL DRY EVENTS Geografía Física Ciencias de la Tierra y relacionadas con el Medio Ambiente CIENCIAS NATURALES Y EXACTAS |
spellingShingle |
PALEOCLIMATIC CHANGES ROCK MAGNETISM SEDIMENT CORES SOUTH AMERICA LAKE LEVEL DRY EVENTS Geografía Física Ciencias de la Tierra y relacionadas con el Medio Ambiente CIENCIAS NATURALES Y EXACTAS Irurzun, Maria Alicia Gogorza, Claudia Susana Sinito, Ana Maria Chaparro, Marcos Adrián Eduardo Prieto, Aldo Raul Laprida, Cecilia Lirio, Juan M. Navas, Ana M. Nuñez, Héctor A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina |
topic_facet |
PALEOCLIMATIC CHANGES ROCK MAGNETISM SEDIMENT CORES SOUTH AMERICA LAKE LEVEL DRY EVENTS Geografía Física Ciencias de la Tierra y relacionadas con el Medio Ambiente CIENCIAS NATURALES Y EXACTAS |
description |
Climatic changes are reflected in variations of different parameters. Sequences of lake sediments are good sources of this information because they provide continuous and detailed records of palaeoclimatic changes. In order to determine the changes in climate in SE Pampas plain,in this paper we present a series of rock magnetic studies performed on a bottom core collected from Lake La Brava (Argentina). In order to establish lake level variations, we also measure total sulphur, organic and inorganic carbon (TS, TOC and TIC) content,alkaline elements, light and heavy metals and changes in vegetation communities. Five radiocarbon age determinations were made from samples of organic-rich clay and calibrated ages were calculated. The averaged sediment accumulation rate is 1.3 mm/yr and the sequence represents a temporal extent of about 4800 calibrated years before the present (cal. BP). The main aim was to reconstruct the hydrological balance of the lake, the changes in erosional strength and sediment supply within the catchment area since the Middle Holocene, and to explore the extent to which these may be linked to changes in climate and/or human activities.The results of this work and previous studies suggest periodic changes from cooler to warmer and humid conditions. Relationships between submerged and emergent plants are consistent with the behaviour of magnetic susceptibility.TOC changes suggest wet environment during magnetic enhancement. Floods and lower lake level events were identified in detail. Changes in sediment contribution and depositional processes for the last 50 cal. BP are caused by human impact, particularly by the use of natural resources. Fil: Irurzun, Maria Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina Fil: Gogorza, Claudia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones En Física E Ingeniería del Centro de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina Fil: Sinito, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina Fil: Chaparro, Marcos Adrián Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina Fil: Prieto, Aldo Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Laprida, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Lirio, Juan M. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina Fil: Navas, Ana M. Consejo Superior de Investigaciones Cientificas; España Fil: Nuñez, Héctor. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina |
format |
Article in Journal/Newspaper |
author |
Irurzun, Maria Alicia Gogorza, Claudia Susana Sinito, Ana Maria Chaparro, Marcos Adrián Eduardo Prieto, Aldo Raul Laprida, Cecilia Lirio, Juan M. Navas, Ana M. Nuñez, Héctor |
author_facet |
Irurzun, Maria Alicia Gogorza, Claudia Susana Sinito, Ana Maria Chaparro, Marcos Adrián Eduardo Prieto, Aldo Raul Laprida, Cecilia Lirio, Juan M. Navas, Ana M. Nuñez, Héctor |
author_sort |
Irurzun, Maria Alicia |
title |
A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina |
title_short |
A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina |
title_full |
A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina |
title_fullStr |
A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina |
title_full_unstemmed |
A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina |
title_sort |
high resolution paleoclimate record for the last 4800 cal. years b.p. on lake la brava se pampa plains, argentina |
publisher |
Elsevier |
url |
http://hdl.handle.net/11336/7633 |
long_lat |
ENVELOPE(-63.483,-63.483,-64.833,-64.833) ENVELOPE(-63.067,-63.067,-64.900,-64.900) ENVELOPE(-129.290,-129.290,53.428,53.428) ENVELOPE(-61.833,-61.833,-64.500,-64.500) ENVELOPE(-57.216,-57.216,-63.883,-63.883) ENVELOPE(-62.000,-62.000,-64.683,-64.683) |
geographic |
Alicia Argentina Argentino Laprida Lower Lake Marcos Pampa Prieto |
geographic_facet |
Alicia Argentina Argentino Laprida Lower Lake Marcos Pampa Prieto |
genre |
Dirección Nacional del Antártico Instituto Antártico Argentino |
genre_facet |
Dirección Nacional del Antártico Instituto Antártico Argentino |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0016716914700728 info:eu-repo/semantics/altIdentifier/doi/10.1016/S0016-7169(14)70072-8 Irurzun, Maria Alicia; Gogorza, Claudia Susana; Sinito, Ana Maria; Chaparro, Marcos Adrián Eduardo; Prieto, Aldo Raul; et al.; A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina; Elsevier; Geofísica Internacional; 53; 4; 11-2014; 365-383 0016-7169 http://hdl.handle.net/11336/7633 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.1016/S0016-7169(14)70072-8 |
container_title |
Geofísica Internacional |
container_volume |
53 |
container_issue |
4 |
container_start_page |
365 |
op_container_end_page |
383 |
_version_ |
1766397013289598976 |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/7633 2023-05-15T16:01:01+02:00 A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina Irurzun, Maria Alicia Gogorza, Claudia Susana Sinito, Ana Maria Chaparro, Marcos Adrián Eduardo Prieto, Aldo Raul Laprida, Cecilia Lirio, Juan M. Navas, Ana M. Nuñez, Héctor application/pdf http://hdl.handle.net/11336/7633 eng eng Elsevier info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0016716914700728 info:eu-repo/semantics/altIdentifier/doi/10.1016/S0016-7169(14)70072-8 Irurzun, Maria Alicia; Gogorza, Claudia Susana; Sinito, Ana Maria; Chaparro, Marcos Adrián Eduardo; Prieto, Aldo Raul; et al.; A high resolution paleoclimate record for the last 4800 cal. years B.P. on Lake La Brava SE Pampa plains, Argentina; Elsevier; Geofísica Internacional; 53; 4; 11-2014; 365-383 0016-7169 http://hdl.handle.net/11336/7633 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ CC-BY-NC-SA PALEOCLIMATIC CHANGES ROCK MAGNETISM SEDIMENT CORES SOUTH AMERICA LAKE LEVEL DRY EVENTS Geografía Física Ciencias de la Tierra y relacionadas con el Medio Ambiente CIENCIAS NATURALES Y EXACTAS info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/S0016-7169(14)70072-8 2019-08-31T16:12:48Z Climatic changes are reflected in variations of different parameters. Sequences of lake sediments are good sources of this information because they provide continuous and detailed records of palaeoclimatic changes. In order to determine the changes in climate in SE Pampas plain,in this paper we present a series of rock magnetic studies performed on a bottom core collected from Lake La Brava (Argentina). In order to establish lake level variations, we also measure total sulphur, organic and inorganic carbon (TS, TOC and TIC) content,alkaline elements, light and heavy metals and changes in vegetation communities. Five radiocarbon age determinations were made from samples of organic-rich clay and calibrated ages were calculated. The averaged sediment accumulation rate is 1.3 mm/yr and the sequence represents a temporal extent of about 4800 calibrated years before the present (cal. BP). The main aim was to reconstruct the hydrological balance of the lake, the changes in erosional strength and sediment supply within the catchment area since the Middle Holocene, and to explore the extent to which these may be linked to changes in climate and/or human activities.The results of this work and previous studies suggest periodic changes from cooler to warmer and humid conditions. Relationships between submerged and emergent plants are consistent with the behaviour of magnetic susceptibility.TOC changes suggest wet environment during magnetic enhancement. Floods and lower lake level events were identified in detail. Changes in sediment contribution and depositional processes for the last 50 cal. BP are caused by human impact, particularly by the use of natural resources. Fil: Irurzun, Maria Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina Fil: Gogorza, Claudia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones En Física E Ingeniería del Centro de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina Fil: Sinito, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina Fil: Chaparro, Marcos Adrián Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina Fil: Prieto, Aldo Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Laprida, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Lirio, Juan M. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina Fil: Navas, Ana M. Consejo Superior de Investigaciones Cientificas; España Fil: Nuñez, Héctor. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina Article in Journal/Newspaper Dirección Nacional del Antártico Instituto Antártico Argentino CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Alicia ENVELOPE(-63.483,-63.483,-64.833,-64.833) Argentina Argentino Laprida ENVELOPE(-63.067,-63.067,-64.900,-64.900) Lower Lake ENVELOPE(-129.290,-129.290,53.428,53.428) Marcos ENVELOPE(-61.833,-61.833,-64.500,-64.500) Pampa ENVELOPE(-57.216,-57.216,-63.883,-63.883) Prieto ENVELOPE(-62.000,-62.000,-64.683,-64.683) Geofísica Internacional 53 4 365 383 |