Paleoceanography of sediment cores SO202-27-6 and MD01-2416
The glacial-to-Holocene evolution of subarctic Pacific surface water stratification and silicic acid (Si) dynamics is investigated based on new combined diatom oxygen (d18Odiat) and silicon (d30Sidiat) isotope records, along with new biogenic opal, subsurface foraminiferal d18O, alkenone-based sea s...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.834308 2023-05-15T16:40:45+02:00 Paleoceanography of sediment cores SO202-27-6 and MD01-2416 Maier, Edith Méheust, Marie Abelmann, Andrea Gersonde, Rainer Chapligin, Bernhard Ren, Jian Stein, Ruediger Meyer, Hanno Tiedemann, Ralf MEDIAN LATITUDE: 53.654050 * MEDIAN LONGITUDE: -158.696307 * SOUTH-BOUND LATITUDE: 51.268000 * WEST-BOUND LONGITUDE: 167.725000 * NORTH-BOUND LATITUDE: 54.390700 * EAST-BOUND LONGITUDE: -148.921300 * DATE/TIME START: 2001-06-09T20:05:00 * DATE/TIME END: 2009-08-02T08:30:00 2015-07-24 application/zip, 14 datasets https://doi.pangaea.de/10.1594/PANGAEA.834308 https://doi.org/10.1594/PANGAEA.834308 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.834308 https://doi.org/10.1594/PANGAEA.834308 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Maier, Edith; Méheust, Marie; Abelmann, Andrea; Gersonde, Rainer; Chapligin, Bernhard; Ren, Jian; Stein, Ruediger; Meyer, Hanno; Tiedemann, Ralf (2015): Deglacial subarctic Pacific surface water hydrography and nutrient dynamics and links to North Atlantic climate variability and atmospheric CO2. Paleoceanography, 30(7), 949-968, https://doi.org/10.1002/2014PA002763 AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Dataset 2015 ftpangaea https://doi.org/10.1594/PANGAEA.834308 https://doi.org/10.1002/2014PA002763 2023-01-20T07:33:19Z The glacial-to-Holocene evolution of subarctic Pacific surface water stratification and silicic acid (Si) dynamics is investigated based on new combined diatom oxygen (d18Odiat) and silicon (d30Sidiat) isotope records, along with new biogenic opal, subsurface foraminiferal d18O, alkenone-based sea surface temperature, sea ice, diatom, and core logging data from the NE Pacific. Our results suggest that d18Odiat values are primarily influenced by changes in freshwater discharge from the Cordilleran Ice Sheet (CIS), while corresponding d30Sidiat are primarily influenced by changes in Si supply to surface waters. Our data indicate enhanced glacial to mid Heinrich Stadial 1 (HS1) NE Pacific surface water stratification, generally limiting the Si supply to surface waters. However, we suggest that an increase in Si supply during early HS1, when surface waters were still stratified, is linked to increased North Pacific Intermediate Water formation. The coincidence between fresh surface waters during HS1 and enhanced ice-rafted debris sedimentation in the North Atlantic indicates a close link between CIS and Laurentide Ice Sheet dynamics and a dominant atmospheric control on CIS deglaciation. The Bølling/Allerød (B/A) is characterized by destratification in the subarctic Pacific and an increased supply of saline, Si-rich waters to surface waters. This change toward increased convection occurred prior to the Bølling warming and is likely triggered by a switch to sea ice-free conditions during late HS1. Our results furthermore indicate a decreased efficiency of the biological pump during late HS1 and the B/A (possibly also the Younger Dryas), suggesting that the subarctic Pacific has then been a source region of atmospheric CO2. Dataset Ice Sheet North Atlantic Sea ice Subarctic PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(167.725000,-148.921300,54.390700,51.268000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
spellingShingle |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Maier, Edith Méheust, Marie Abelmann, Andrea Gersonde, Rainer Chapligin, Bernhard Ren, Jian Stein, Ruediger Meyer, Hanno Tiedemann, Ralf Paleoceanography of sediment cores SO202-27-6 and MD01-2416 |
topic_facet |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
description |
The glacial-to-Holocene evolution of subarctic Pacific surface water stratification and silicic acid (Si) dynamics is investigated based on new combined diatom oxygen (d18Odiat) and silicon (d30Sidiat) isotope records, along with new biogenic opal, subsurface foraminiferal d18O, alkenone-based sea surface temperature, sea ice, diatom, and core logging data from the NE Pacific. Our results suggest that d18Odiat values are primarily influenced by changes in freshwater discharge from the Cordilleran Ice Sheet (CIS), while corresponding d30Sidiat are primarily influenced by changes in Si supply to surface waters. Our data indicate enhanced glacial to mid Heinrich Stadial 1 (HS1) NE Pacific surface water stratification, generally limiting the Si supply to surface waters. However, we suggest that an increase in Si supply during early HS1, when surface waters were still stratified, is linked to increased North Pacific Intermediate Water formation. The coincidence between fresh surface waters during HS1 and enhanced ice-rafted debris sedimentation in the North Atlantic indicates a close link between CIS and Laurentide Ice Sheet dynamics and a dominant atmospheric control on CIS deglaciation. The Bølling/Allerød (B/A) is characterized by destratification in the subarctic Pacific and an increased supply of saline, Si-rich waters to surface waters. This change toward increased convection occurred prior to the Bølling warming and is likely triggered by a switch to sea ice-free conditions during late HS1. Our results furthermore indicate a decreased efficiency of the biological pump during late HS1 and the B/A (possibly also the Younger Dryas), suggesting that the subarctic Pacific has then been a source region of atmospheric CO2. |
format |
Dataset |
author |
Maier, Edith Méheust, Marie Abelmann, Andrea Gersonde, Rainer Chapligin, Bernhard Ren, Jian Stein, Ruediger Meyer, Hanno Tiedemann, Ralf |
author_facet |
Maier, Edith Méheust, Marie Abelmann, Andrea Gersonde, Rainer Chapligin, Bernhard Ren, Jian Stein, Ruediger Meyer, Hanno Tiedemann, Ralf |
author_sort |
Maier, Edith |
title |
Paleoceanography of sediment cores SO202-27-6 and MD01-2416 |
title_short |
Paleoceanography of sediment cores SO202-27-6 and MD01-2416 |
title_full |
Paleoceanography of sediment cores SO202-27-6 and MD01-2416 |
title_fullStr |
Paleoceanography of sediment cores SO202-27-6 and MD01-2416 |
title_full_unstemmed |
Paleoceanography of sediment cores SO202-27-6 and MD01-2416 |
title_sort |
paleoceanography of sediment cores so202-27-6 and md01-2416 |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.834308 https://doi.org/10.1594/PANGAEA.834308 |
op_coverage |
MEDIAN LATITUDE: 53.654050 * MEDIAN LONGITUDE: -158.696307 * SOUTH-BOUND LATITUDE: 51.268000 * WEST-BOUND LONGITUDE: 167.725000 * NORTH-BOUND LATITUDE: 54.390700 * EAST-BOUND LONGITUDE: -148.921300 * DATE/TIME START: 2001-06-09T20:05:00 * DATE/TIME END: 2009-08-02T08:30:00 |
long_lat |
ENVELOPE(167.725000,-148.921300,54.390700,51.268000) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ice Sheet North Atlantic Sea ice Subarctic |
genre_facet |
Ice Sheet North Atlantic Sea ice Subarctic |
op_source |
Supplement to: Maier, Edith; Méheust, Marie; Abelmann, Andrea; Gersonde, Rainer; Chapligin, Bernhard; Ren, Jian; Stein, Ruediger; Meyer, Hanno; Tiedemann, Ralf (2015): Deglacial subarctic Pacific surface water hydrography and nutrient dynamics and links to North Atlantic climate variability and atmospheric CO2. Paleoceanography, 30(7), 949-968, https://doi.org/10.1002/2014PA002763 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.834308 https://doi.org/10.1594/PANGAEA.834308 |
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.834308 https://doi.org/10.1002/2014PA002763 |
_version_ |
1766031172998004736 |