Lipids as indicators of paleoclimatic changes, II: terrestrial biomarkers
Variations in the abundance of specific lipid biomarker compounds derived from terrestrial sources are shown to be closely related to past climatic changes. Despite biodegradation processes, which take place mostly at the water column and sediment water interface, these compounds are found well pres...
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ftdoajarticles:oai:doaj.org/article:ef096b265d844464a0f08a1a7717902d 2023-05-15T17:31:39+02:00 Lipids as indicators of paleoclimatic changes, II: terrestrial biomarkers Luiz A. S. Madureira Alexandre Piccinini 1999-01-01T00:00:00Z https://doi.org/10.1590/S1679-87591999000200001 https://doaj.org/article/ef096b265d844464a0f08a1a7717902d EN eng Universidade de São Paulo http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87591999000200001 https://doaj.org/toc/1679-8759 https://doaj.org/toc/1982-436X doi:10.1590/S1679-87591999000200001 1679-8759 1982-436X https://doaj.org/article/ef096b265d844464a0f08a1a7717902d Brazilian Journal of Oceanography, Vol 47, Iss 2, Pp 115-125 (1999) Biomarcadores Sedimento marinho Cromatografia Atlântico Norte Biomarkers Marine sediment Chromatography North Atlantic Oceanography GC1-1581 article 1999 ftdoajarticles https://doi.org/10.1590/S1679-87591999000200001 2022-12-31T01:10:38Z Variations in the abundance of specific lipid biomarker compounds derived from terrestrial sources are shown to be closely related to past climatic changes. Despite biodegradation processes, which take place mostly at the water column and sediment water interface, these compounds are found well preserved in oceanic sediments. Here, their relative distribution is employed as a tool to assess changes in terrestrial fluxes to the seabed accompanying climatic variations during glacial and interglacial intervals. These changes in biomarker distribution were estimated in two sediment cores taken ttom the eastern North Atlantic, covering the past 210,000 years. Comparisons with other paleoclimate proxies showed good agreement and suggest that some specific groups of biomarkers are important indicators of changes in terrestrial inputs to the sea. A variação na abundância de alguns biomarcadores lipídicos derivados de aportes terrestres pode estar relacionada com mudanças climáticas no passado. Apesar dos processos de biodegradação que, na grande maioria, ocorrem na coluna aquática e na interface sedimento-água, esses compostos são encontrados bem preservados em sedimentos oceânicos. Nesse trabalho, a distribuição relativa desses compostos é empregada como uma ferramenta para avaliar mudanças no transporte de material terrestre para o mar em paralelo às variações climáticas durante os intervalos glaciais e interglaciais. As mudanças na distribuição dos biomarcadores foram estimadas em dois testemunhos coletados ao leste do Atlântico Norte e que correspondem aos últimos 210 mil anos. Os resultados mostraram uma boa correlação entre a distribuição dos biomarcadores e outros parâmetros paleoclimáticos previamente avaliados nos perfis, sugerindo que alguns grupos específicos de compostos orgânicos são importantes indicadores de aporte terrestre para ornar. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Boa ENVELOPE(15.532,15.532,66.822,66.822) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Biomarcadores Sedimento marinho Cromatografia Atlântico Norte Biomarkers Marine sediment Chromatography North Atlantic Oceanography GC1-1581 |
spellingShingle |
Biomarcadores Sedimento marinho Cromatografia Atlântico Norte Biomarkers Marine sediment Chromatography North Atlantic Oceanography GC1-1581 Luiz A. S. Madureira Alexandre Piccinini Lipids as indicators of paleoclimatic changes, II: terrestrial biomarkers |
topic_facet |
Biomarcadores Sedimento marinho Cromatografia Atlântico Norte Biomarkers Marine sediment Chromatography North Atlantic Oceanography GC1-1581 |
description |
Variations in the abundance of specific lipid biomarker compounds derived from terrestrial sources are shown to be closely related to past climatic changes. Despite biodegradation processes, which take place mostly at the water column and sediment water interface, these compounds are found well preserved in oceanic sediments. Here, their relative distribution is employed as a tool to assess changes in terrestrial fluxes to the seabed accompanying climatic variations during glacial and interglacial intervals. These changes in biomarker distribution were estimated in two sediment cores taken ttom the eastern North Atlantic, covering the past 210,000 years. Comparisons with other paleoclimate proxies showed good agreement and suggest that some specific groups of biomarkers are important indicators of changes in terrestrial inputs to the sea. A variação na abundância de alguns biomarcadores lipídicos derivados de aportes terrestres pode estar relacionada com mudanças climáticas no passado. Apesar dos processos de biodegradação que, na grande maioria, ocorrem na coluna aquática e na interface sedimento-água, esses compostos são encontrados bem preservados em sedimentos oceânicos. Nesse trabalho, a distribuição relativa desses compostos é empregada como uma ferramenta para avaliar mudanças no transporte de material terrestre para o mar em paralelo às variações climáticas durante os intervalos glaciais e interglaciais. As mudanças na distribuição dos biomarcadores foram estimadas em dois testemunhos coletados ao leste do Atlântico Norte e que correspondem aos últimos 210 mil anos. Os resultados mostraram uma boa correlação entre a distribuição dos biomarcadores e outros parâmetros paleoclimáticos previamente avaliados nos perfis, sugerindo que alguns grupos específicos de compostos orgânicos são importantes indicadores de aporte terrestre para ornar. |
format |
Article in Journal/Newspaper |
author |
Luiz A. S. Madureira Alexandre Piccinini |
author_facet |
Luiz A. S. Madureira Alexandre Piccinini |
author_sort |
Luiz A. S. Madureira |
title |
Lipids as indicators of paleoclimatic changes, II: terrestrial biomarkers |
title_short |
Lipids as indicators of paleoclimatic changes, II: terrestrial biomarkers |
title_full |
Lipids as indicators of paleoclimatic changes, II: terrestrial biomarkers |
title_fullStr |
Lipids as indicators of paleoclimatic changes, II: terrestrial biomarkers |
title_full_unstemmed |
Lipids as indicators of paleoclimatic changes, II: terrestrial biomarkers |
title_sort |
lipids as indicators of paleoclimatic changes, ii: terrestrial biomarkers |
publisher |
Universidade de São Paulo |
publishDate |
1999 |
url |
https://doi.org/10.1590/S1679-87591999000200001 https://doaj.org/article/ef096b265d844464a0f08a1a7717902d |
long_lat |
ENVELOPE(15.532,15.532,66.822,66.822) |
geographic |
Boa |
geographic_facet |
Boa |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Brazilian Journal of Oceanography, Vol 47, Iss 2, Pp 115-125 (1999) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87591999000200001 https://doaj.org/toc/1679-8759 https://doaj.org/toc/1982-436X doi:10.1590/S1679-87591999000200001 1679-8759 1982-436X https://doaj.org/article/ef096b265d844464a0f08a1a7717902d |
op_doi |
https://doi.org/10.1590/S1679-87591999000200001 |
_version_ |
1766129336768790528 |