Foraminifera and stable isotope record of ODP Leg 105 sites
Faunal and stable isotopic data in Sites 646 and 647 provide a ~0.9-Ma paleoclimatic and paleoceanographic record for the Labrador Sea, that is supported by a floral record for the past ~0.3 Ma. At both sites, most glacial stages generally are dominated by polar fauna and flora with low species dive...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.744839 2023-05-15T16:41:19+02:00 Foraminifera and stable isotope record of ODP Leg 105 sites Aksu, Ali E de Vernal, Anne Mudie, Peta J MEDIAN LATITUDE: 55.770300 * MEDIAN LONGITUDE: -46.815550 * SOUTH-BOUND LATITUDE: 53.331300 * WEST-BOUND LONGITUDE: -48.369100 * NORTH-BOUND LATITUDE: 58.209300 * EAST-BOUND LONGITUDE: -45.262000 * DATE/TIME START: 1985-10-03T00:00:00 * DATE/TIME END: 1985-10-25T06:15:00 1989-08-31 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.744839 https://doi.org/10.1594/PANGAEA.744839 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.744839 https://doi.org/10.1594/PANGAEA.744839 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Aksu, Ali E; de Vernal, Anne; Mudie, Peta J (1989): High-resolution foraminifer, palynologic, and stable isotopic records of Upper Pleistocene sediments from the Labrador Sea: paleoclimatic and paleoceanographic trends. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 617-652, https://doi.org/10.2973/odp.proc.sr.105.140.1989 105-646 105-647B COMPCORE Composite Core DRILL Drilling/drill rig Joides Resolution Labrador Sea Leg105 North Atlantic Ocean Ocean Drilling Program ODP Dataset 1989 ftpangaea https://doi.org/10.1594/PANGAEA.744839 https://doi.org/10.2973/odp.proc.sr.105.140.1989 2023-01-20T07:31:53Z Faunal and stable isotopic data in Sites 646 and 647 provide a ~0.9-Ma paleoclimatic and paleoceanographic record for the Labrador Sea, that is supported by a floral record for the past ~0.3 Ma. At both sites, most glacial stages generally are dominated by polar fauna and flora with low species diversity. Although minor occurrences of subpolar species also were observed in lowermost parts of several glacial stages in Site 646, the faunal classification of Ruddiman and Mclntyre (1976) suggested the presence of polar ecological water masses in the area during most of the glacial periods. In several glacial stages at Site 647, both the faunal and floral data indicate that early periods were marked by subpolar and transitional ecological water masses. The interglacials are characterized by a polar fauna at Site 646 and by polar and transitional faunas and floras at Site 647. However, several interglacial stages in Site 646 include a subpolar flora, in contrast to a planktonic foraminifer fauna similar to that found in the glacial stages. The occurrence of subpolar water masses in several glacial isotopic stages indicates significant northward advection of warmer waters into the Labrador Sea during the early glacial periods, which provided a corridor of oceanic warmth extending from mid- to high latitudes and contributed an additional source of moisture for continental ice-sheet growth. Similar conditions also were documented in the northwest Labrador Sea, Grand Banks, and the North Atlantic. Dataset Ice Sheet Labrador Sea North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-48.369100,-45.262000,58.209300,53.331300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
105-646 105-647B COMPCORE Composite Core DRILL Drilling/drill rig Joides Resolution Labrador Sea Leg105 North Atlantic Ocean Ocean Drilling Program ODP |
spellingShingle |
105-646 105-647B COMPCORE Composite Core DRILL Drilling/drill rig Joides Resolution Labrador Sea Leg105 North Atlantic Ocean Ocean Drilling Program ODP Aksu, Ali E de Vernal, Anne Mudie, Peta J Foraminifera and stable isotope record of ODP Leg 105 sites |
topic_facet |
105-646 105-647B COMPCORE Composite Core DRILL Drilling/drill rig Joides Resolution Labrador Sea Leg105 North Atlantic Ocean Ocean Drilling Program ODP |
description |
Faunal and stable isotopic data in Sites 646 and 647 provide a ~0.9-Ma paleoclimatic and paleoceanographic record for the Labrador Sea, that is supported by a floral record for the past ~0.3 Ma. At both sites, most glacial stages generally are dominated by polar fauna and flora with low species diversity. Although minor occurrences of subpolar species also were observed in lowermost parts of several glacial stages in Site 646, the faunal classification of Ruddiman and Mclntyre (1976) suggested the presence of polar ecological water masses in the area during most of the glacial periods. In several glacial stages at Site 647, both the faunal and floral data indicate that early periods were marked by subpolar and transitional ecological water masses. The interglacials are characterized by a polar fauna at Site 646 and by polar and transitional faunas and floras at Site 647. However, several interglacial stages in Site 646 include a subpolar flora, in contrast to a planktonic foraminifer fauna similar to that found in the glacial stages. The occurrence of subpolar water masses in several glacial isotopic stages indicates significant northward advection of warmer waters into the Labrador Sea during the early glacial periods, which provided a corridor of oceanic warmth extending from mid- to high latitudes and contributed an additional source of moisture for continental ice-sheet growth. Similar conditions also were documented in the northwest Labrador Sea, Grand Banks, and the North Atlantic. |
format |
Dataset |
author |
Aksu, Ali E de Vernal, Anne Mudie, Peta J |
author_facet |
Aksu, Ali E de Vernal, Anne Mudie, Peta J |
author_sort |
Aksu, Ali E |
title |
Foraminifera and stable isotope record of ODP Leg 105 sites |
title_short |
Foraminifera and stable isotope record of ODP Leg 105 sites |
title_full |
Foraminifera and stable isotope record of ODP Leg 105 sites |
title_fullStr |
Foraminifera and stable isotope record of ODP Leg 105 sites |
title_full_unstemmed |
Foraminifera and stable isotope record of ODP Leg 105 sites |
title_sort |
foraminifera and stable isotope record of odp leg 105 sites |
publisher |
PANGAEA |
publishDate |
1989 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.744839 https://doi.org/10.1594/PANGAEA.744839 |
op_coverage |
MEDIAN LATITUDE: 55.770300 * MEDIAN LONGITUDE: -46.815550 * SOUTH-BOUND LATITUDE: 53.331300 * WEST-BOUND LONGITUDE: -48.369100 * NORTH-BOUND LATITUDE: 58.209300 * EAST-BOUND LONGITUDE: -45.262000 * DATE/TIME START: 1985-10-03T00:00:00 * DATE/TIME END: 1985-10-25T06:15:00 |
long_lat |
ENVELOPE(-48.369100,-45.262000,58.209300,53.331300) |
genre |
Ice Sheet Labrador Sea North Atlantic |
genre_facet |
Ice Sheet Labrador Sea North Atlantic |
op_source |
Supplement to: Aksu, Ali E; de Vernal, Anne; Mudie, Peta J (1989): High-resolution foraminifer, palynologic, and stable isotopic records of Upper Pleistocene sediments from the Labrador Sea: paleoclimatic and paleoceanographic trends. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 617-652, https://doi.org/10.2973/odp.proc.sr.105.140.1989 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.744839 https://doi.org/10.1594/PANGAEA.744839 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.744839 https://doi.org/10.2973/odp.proc.sr.105.140.1989 |
_version_ |
1766031751941980160 |