Stable oxygen isotope record and Calcium concentrations of sediment core GeoB3910-2
There is increasing evidence that the preceding Holocene climate was as unstable as the last glacial period, although variations occurred at much lower amplitudes. However, low-latitude climate records that confirm this variability are sparse. Here we present a radiocarbon-dated Holocene marine reco...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.735159 2023-05-15T17:25:27+02:00 Stable oxygen isotope record and Calcium concentrations of sediment core GeoB3910-2 Arz, Helge Wolfgang Gerhardt, Sabine Pätzold, Jürgen Röhl, Ursula LATITUDE: -4.245000 * LONGITUDE: -36.345000 * DATE/TIME START: 1996-03-30T00:00:00 * DATE/TIME END: 1996-03-30T00:00:00 2001-03-16 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.735159 https://doi.org/10.1594/PANGAEA.735159 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.735159 https://doi.org/10.1594/PANGAEA.735159 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Arz, Helge Wolfgang; Gerhardt, Sabine; Pätzold, Jürgen; Röhl, Ursula (2001): Millennial-scale changes of surface- and deep-water flow in the western tropical Atlantic linked to Northern Hemisphere high-latitude climate during the Holocene. Geology, 29(3), 239-242, https://doi.org/10.1130/0091-7613(2001)029%3C0239:MSCOSA%3E2.0.CO;2 GeoB GeoB3910-2 Geosciences University of Bremen Gravity corer (Kiel type) M34/4 Meteor (1986) Northeast Brasilian Margin SFB261 SL South Atlantic in Late Quaternary: Reconstruction of Budget and Currents Dataset 2001 ftpangaea https://doi.org/10.1594/PANGAEA.735159 https://doi.org/10.1130/0091-7613(2001)029%3C0239:MSCOSA%3E2.0.CO;2 2023-01-20T07:31:41Z There is increasing evidence that the preceding Holocene climate was as unstable as the last glacial period, although variations occurred at much lower amplitudes. However, low-latitude climate records that confirm this variability are sparse. Here we present a radiocarbon-dated Holocene marine record from the tropical western Atlantic. Aragonite dissolution derived from the degree of preservation of the pteropod Limacina inflata records changes in the corrosiveness of the bottom water at the core site due to the changing influence of northern versus southern water masses. The delta18O difference between the shallow-living planktonic foraminifera Globigerinoides sacculifer and the deep-living Globorotalia tumida is used as proxy for changes in the vertical stratification of the surface water, hence the trade wind strength at this latitude. We compared our data to high-latitude records of the North Atlantic region. A good agreement is found between the aragonite dissolution and the strength in the Island-Scotland Overflow Water, which contributes significantly to the North Atlantic Deep Water. This suggests that large-scale variations in the Atlantic thermohaline circulation occurred throughout the Holocene. Concurrently, the comparison of our Delta delta18O with the GISP2 glaciochemical records points to global Holocene atmospheric reorganizations seen in both the tropics and high northern latitudes. Dataset North Atlantic Deep Water North Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-36.345000,-36.345000,-4.245000,-4.245000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
GeoB GeoB3910-2 Geosciences University of Bremen Gravity corer (Kiel type) M34/4 Meteor (1986) Northeast Brasilian Margin SFB261 SL South Atlantic in Late Quaternary: Reconstruction of Budget and Currents |
spellingShingle |
GeoB GeoB3910-2 Geosciences University of Bremen Gravity corer (Kiel type) M34/4 Meteor (1986) Northeast Brasilian Margin SFB261 SL South Atlantic in Late Quaternary: Reconstruction of Budget and Currents Arz, Helge Wolfgang Gerhardt, Sabine Pätzold, Jürgen Röhl, Ursula Stable oxygen isotope record and Calcium concentrations of sediment core GeoB3910-2 |
topic_facet |
GeoB GeoB3910-2 Geosciences University of Bremen Gravity corer (Kiel type) M34/4 Meteor (1986) Northeast Brasilian Margin SFB261 SL South Atlantic in Late Quaternary: Reconstruction of Budget and Currents |
description |
There is increasing evidence that the preceding Holocene climate was as unstable as the last glacial period, although variations occurred at much lower amplitudes. However, low-latitude climate records that confirm this variability are sparse. Here we present a radiocarbon-dated Holocene marine record from the tropical western Atlantic. Aragonite dissolution derived from the degree of preservation of the pteropod Limacina inflata records changes in the corrosiveness of the bottom water at the core site due to the changing influence of northern versus southern water masses. The delta18O difference between the shallow-living planktonic foraminifera Globigerinoides sacculifer and the deep-living Globorotalia tumida is used as proxy for changes in the vertical stratification of the surface water, hence the trade wind strength at this latitude. We compared our data to high-latitude records of the North Atlantic region. A good agreement is found between the aragonite dissolution and the strength in the Island-Scotland Overflow Water, which contributes significantly to the North Atlantic Deep Water. This suggests that large-scale variations in the Atlantic thermohaline circulation occurred throughout the Holocene. Concurrently, the comparison of our Delta delta18O with the GISP2 glaciochemical records points to global Holocene atmospheric reorganizations seen in both the tropics and high northern latitudes. |
format |
Dataset |
author |
Arz, Helge Wolfgang Gerhardt, Sabine Pätzold, Jürgen Röhl, Ursula |
author_facet |
Arz, Helge Wolfgang Gerhardt, Sabine Pätzold, Jürgen Röhl, Ursula |
author_sort |
Arz, Helge Wolfgang |
title |
Stable oxygen isotope record and Calcium concentrations of sediment core GeoB3910-2 |
title_short |
Stable oxygen isotope record and Calcium concentrations of sediment core GeoB3910-2 |
title_full |
Stable oxygen isotope record and Calcium concentrations of sediment core GeoB3910-2 |
title_fullStr |
Stable oxygen isotope record and Calcium concentrations of sediment core GeoB3910-2 |
title_full_unstemmed |
Stable oxygen isotope record and Calcium concentrations of sediment core GeoB3910-2 |
title_sort |
stable oxygen isotope record and calcium concentrations of sediment core geob3910-2 |
publisher |
PANGAEA |
publishDate |
2001 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.735159 https://doi.org/10.1594/PANGAEA.735159 |
op_coverage |
LATITUDE: -4.245000 * LONGITUDE: -36.345000 * DATE/TIME START: 1996-03-30T00:00:00 * DATE/TIME END: 1996-03-30T00:00:00 |
long_lat |
ENVELOPE(-36.345000,-36.345000,-4.245000,-4.245000) |
genre |
North Atlantic Deep Water North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Deep Water North Atlantic Planktonic foraminifera |
op_source |
Supplement to: Arz, Helge Wolfgang; Gerhardt, Sabine; Pätzold, Jürgen; Röhl, Ursula (2001): Millennial-scale changes of surface- and deep-water flow in the western tropical Atlantic linked to Northern Hemisphere high-latitude climate during the Holocene. Geology, 29(3), 239-242, https://doi.org/10.1130/0091-7613(2001)029%3C0239:MSCOSA%3E2.0.CO;2 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.735159 https://doi.org/10.1594/PANGAEA.735159 |
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.735159 https://doi.org/10.1130/0091-7613(2001)029%3C0239:MSCOSA%3E2.0.CO;2 |
_version_ |
1766116873534963712 |