Current and productivity patterns in the equatorial Pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients

Radiolarians were studied in 11 box-cores retrieved in the western (160°E), central (135°W) and eastern (90°W) equatorial Pacific. The western and central cores span the last ca. 40 000 yrs, while the eatern core is estimated to reach approx. 12 000-17 000 yrs. Time-average data show very sharp asse...

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Detalles Bibliográficos
Autor principal:	Boltovskoy, Demetrio
Publicado:	1992
Materias:	currents downcore faunal gradients faunal gradient Last Glacial Maximum palaeoceanography productivity productivity pattern radiolaria radiolarian (Equatorial) Pacific Radiolaria (protozoans)
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00262803_v38_n4_p397_Boltovskoy http://hdl.handle.net/20.500.12110/paper_00262803_v38_n4_p397_Boltovskoy
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00262803_v38_n4_p397_Boltovskoy
record_format	dspace
spelling	paper:paper_00262803_v38_n4_p397_Boltovskoy2023-06-08T14:53:50Z Current and productivity patterns in the equatorial Pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients Boltovskoy, Demetrio currents downcore faunal gradients faunal gradient Last Glacial Maximum palaeoceanography productivity productivity pattern radiolaria radiolarian (Equatorial) Pacific Radiolaria (protozoans) Radiolarians were studied in 11 box-cores retrieved in the western (160°E), central (135°W) and eastern (90°W) equatorial Pacific. The western and central cores span the last ca. 40 000 yrs, while the eatern core is estimated to reach approx. 12 000-17 000 yrs. Time-average data show very sharp assemblage composition difference between the three locales. Species dominant at the western most sites are indicative of warm, oligotrophic conditions; than atocoenoses from 135°W suggest strong input of California Current radiolarians; while the easternmost core hosts assemblages which point to a significant influence of the Peru Current. In the central and eastern parts of the equatorial Pacific belt, radiolarian distributional patterns in the sediments and their shifts during the last millennia respond chiefly to environmental conditions at depths in excess of 50 m (rather than to sea surface temperature), and to subsurface and deep lateral advection of shells from eastern boundary current areas. -from Author Fil:Boltovskoy, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1992 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00262803_v38_n4_p397_Boltovskoy http://hdl.handle.net/20.500.12110/paper_00262803_v38_n4_p397_Boltovskoy
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	currents downcore faunal gradients faunal gradient Last Glacial Maximum palaeoceanography productivity productivity pattern radiolaria radiolarian (Equatorial) Pacific Radiolaria (protozoans)
spellingShingle	currents downcore faunal gradients faunal gradient Last Glacial Maximum palaeoceanography productivity productivity pattern radiolaria radiolarian (Equatorial) Pacific Radiolaria (protozoans) Boltovskoy, Demetrio Current and productivity patterns in the equatorial Pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients
topic_facet	currents downcore faunal gradients faunal gradient Last Glacial Maximum palaeoceanography productivity productivity pattern radiolaria radiolarian (Equatorial) Pacific Radiolaria (protozoans)
description	Radiolarians were studied in 11 box-cores retrieved in the western (160°E), central (135°W) and eastern (90°W) equatorial Pacific. The western and central cores span the last ca. 40 000 yrs, while the eatern core is estimated to reach approx. 12 000-17 000 yrs. Time-average data show very sharp assemblage composition difference between the three locales. Species dominant at the western most sites are indicative of warm, oligotrophic conditions; than atocoenoses from 135°W suggest strong input of California Current radiolarians; while the easternmost core hosts assemblages which point to a significant influence of the Peru Current. In the central and eastern parts of the equatorial Pacific belt, radiolarian distributional patterns in the sediments and their shifts during the last millennia respond chiefly to environmental conditions at depths in excess of 50 m (rather than to sea surface temperature), and to subsurface and deep lateral advection of shells from eastern boundary current areas. -from Author
author	Boltovskoy, Demetrio
author_facet	Boltovskoy, Demetrio
author_sort	Boltovskoy, Demetrio
title	Current and productivity patterns in the equatorial Pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients
title_short	Current and productivity patterns in the equatorial Pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients
title_full	Current and productivity patterns in the equatorial Pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients
title_fullStr	Current and productivity patterns in the equatorial Pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients
title_full_unstemmed	Current and productivity patterns in the equatorial Pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients
title_sort	current and productivity patterns in the equatorial pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients
publishDate	1992
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00262803_v38_n4_p397_Boltovskoy http://hdl.handle.net/20.500.12110/paper_00262803_v38_n4_p397_Boltovskoy
work_keys_str_mv	AT boltovskoydemetrio currentandproductivitypatternsintheequatorialpacificacrossthelastglacialmaxiumbasedonradiolarianeastwestanddowncorefaunalgradients
_version_	1768544719499952128

Current and productivity patterns in the equatorial Pacific across the last glacial maxium based on radiolarian east-west and downcore faunal gradients

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