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Diatom percentage abundances for sediment core KH-10-7 COR1GC from the Conrad Rise, Southern Ocean

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Main Authors:	Orme, Lisa C, Crosta, Xavier, Miettinen, Arto, Divine, Dmitry V, Husum, Katrine, Isaksson, Elisabeth, Wacker, Lukas, Mohan, Rahul, Ther, Oliver, Ikehara, Minoru
Format:	Dataset Open Access
Language:	en
Published:	PANGAEA 2020
Subjects:	Actinocyclus actinochilus; AGE; Age, calibrated; Azpeitia tabularis; Chaetoceros sp.; Conrad Rise; Counting, diatoms; Deglaciation; DEPTH, sediment/rock; diatoms; Fragilariopsis curta; Fragilariopsis cylindrus; Fragilariopsis doliolus; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Fragilariopsis ritscheri; Fragilariopsis separanda; Fragilariopsis sublinearis; GC; Gravity corer; Holocene; KH-10-7_COR1GC; Porosira glacialis; Porosira pseudodenticulata; Rhizosolenia antennata forma antennata; Sea surface temperature; Southern Ocean; Thalassionema nitzschioides var. lanceolata; Thalassiosira eccentrica; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oestrupii; Thalassiosira oliverana; Thalassiosira tumida; Thalassiothrix antarctica; Trichotoxon reinboldii
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author	Orme, Lisa C Crosta, Xavier Miettinen, Arto Divine, Dmitry V Husum, Katrine Isaksson, Elisabeth Wacker, Lukas Mohan, Rahul Ther, Oliver Ikehara, Minoru
author_facet	Orme, Lisa C Crosta, Xavier Miettinen, Arto Divine, Dmitry V Husum, Katrine Isaksson, Elisabeth Wacker, Lukas Mohan, Rahul Ther, Oliver Ikehara, Minoru
collection	Datos científicos de ciencias marinas y ambientales
contents	Centennial and millennial scale variability of Southern Ocean temperature is poorly known, due to both short instrumental records and sparsely distributed high-resolution temperature reconstructions, with evidence for past temperature variability instead coming mainly from ice core records. Here we present a high-resolution (~ 60 year) record of diatom abundance from the western Indian sector of the Southern Ocean that spans the interval 14.2 to 1.0 ka BP (calibrated kiloyears before present). The results show the dominant species are Fragilariopsis kerguelensis and Thalassiosira lentiginosa, with accompanying species typical of the Polar Front Zone and Permanent Open Ocean Zone. Species associated with warmer temperatures were most abundant in the period 12-9.5 ka BP, while species associated with lower temperatures were abundant at 14.2-9.5 ka BP.
format	Dataset Open Access
id	pangaea_https___doi_org_10_1594_PANGAEA_913620
institution	PANGAEA
language	en
publishDate	2020
publisher	PANGAEA
record_format	pangaea
spellingShingle	Diatom percentage abundances for sediment core KH-10-7 COR1GC from the Conrad Rise, Southern Ocean Orme, Lisa C Crosta, Xavier Miettinen, Arto Divine, Dmitry V Husum, Katrine Isaksson, Elisabeth Wacker, Lukas Mohan, Rahul Ther, Oliver Ikehara, Minoru Actinocyclus actinochilus; AGE; Age, calibrated; Azpeitia tabularis; Chaetoceros sp.; Conrad Rise; Counting, diatoms; Deglaciation; DEPTH, sediment/rock; diatoms; Fragilariopsis curta; Fragilariopsis cylindrus; Fragilariopsis doliolus; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Fragilariopsis ritscheri; Fragilariopsis separanda; Fragilariopsis sublinearis; GC; Gravity corer; Holocene; KH-10-7_COR1GC; Porosira glacialis; Porosira pseudodenticulata; Rhizosolenia antennata forma antennata; Sea surface temperature; Southern Ocean; Thalassionema nitzschioides var. lanceolata; Thalassiosira eccentrica; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oestrupii; Thalassiosira oliverana; Thalassiosira tumida; Thalassiothrix antarctica; Trichotoxon reinboldii Centennial and millennial scale variability of Southern Ocean temperature is poorly known, due to both short instrumental records and sparsely distributed high-resolution temperature reconstructions, with evidence for past temperature variability instead coming mainly from ice core records. Here we present a high-resolution (~ 60 year) record of diatom abundance from the western Indian sector of the Southern Ocean that spans the interval 14.2 to 1.0 ka BP (calibrated kiloyears before present). The results show the dominant species are Fragilariopsis kerguelensis and Thalassiosira lentiginosa, with accompanying species typical of the Polar Front Zone and Permanent Open Ocean Zone. Species associated with warmer temperatures were most abundant in the period 12-9.5 ka BP, while species associated with lower temperatures were abundant at 14.2-9.5 ka BP.
title	Diatom percentage abundances for sediment core KH-10-7 COR1GC from the Conrad Rise, Southern Ocean
topic	Actinocyclus actinochilus; AGE; Age, calibrated; Azpeitia tabularis; Chaetoceros sp.; Conrad Rise; Counting, diatoms; Deglaciation; DEPTH, sediment/rock; diatoms; Fragilariopsis curta; Fragilariopsis cylindrus; Fragilariopsis doliolus; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Fragilariopsis ritscheri; Fragilariopsis separanda; Fragilariopsis sublinearis; GC; Gravity corer; Holocene; KH-10-7_COR1GC; Porosira glacialis; Porosira pseudodenticulata; Rhizosolenia antennata forma antennata; Sea surface temperature; Southern Ocean; Thalassionema nitzschioides var. lanceolata; Thalassiosira eccentrica; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oestrupii; Thalassiosira oliverana; Thalassiosira tumida; Thalassiothrix antarctica; Trichotoxon reinboldii
url	https://doi.org/10.1594/PANGAEA.913620