Age and stable isotopic record of high and lower latitude of the Pacific, supplement to: Rippert, Nadine; Max, Lars; Mackensen, Andreas; Cacho, Isabel; Povea, Patricia; Tiedemann, Ralf (2017): Alternating influence of northern versus southern-sourced water masses on the equatorial Pacific subthermocline during the past 240 ka. Paleoceanography, 32(11), 1256-1274
The Eastern Equatorial Pacific (EEP) is a key area to understand past oceanic processes that control atmospheric CO2 concentrations. Many studies argue for higher nutrient concentrations by enhanced nutrient transfer via Southern Ocean Intermediate Water (SOIW) to the low-latitude Pacific during gla...
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ftdatacite:10.1594/pangaea.882520 2023-05-15T18:01:06+02:00 Age and stable isotopic record of high and lower latitude of the Pacific, supplement to: Rippert, Nadine; Max, Lars; Mackensen, Andreas; Cacho, Isabel; Povea, Patricia; Tiedemann, Ralf (2017): Alternating influence of northern versus southern-sourced water masses on the equatorial Pacific subthermocline during the past 240 ka. Paleoceanography, 32(11), 1256-1274 Rippert, Nadine Max, Lars Mackensen, Andreas Cacho, Isabel Povea, Patricia Tiedemann, Ralf 2017 application/zip https://dx.doi.org/10.1594/pangaea.882520 https://doi.pangaea.de/10.1594/PANGAEA.882520 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1002/2017pa003133 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Collection article Supplementary Collection of Datasets 2017 ftdatacite https://doi.org/10.1594/pangaea.882520 https://doi.org/10.1002/2017pa003133 2021-11-05T12:55:41Z The Eastern Equatorial Pacific (EEP) is a key area to understand past oceanic processes that control atmospheric CO2 concentrations. Many studies argue for higher nutrient concentrations by enhanced nutrient transfer via Southern Ocean Intermediate Water (SOIW) to the low-latitude Pacific during glacials. Recent studies, however, argue against SOIW as the primary nutrient source, at least during early Marine Isotope Stage 2 (MIS 2), as proxy-data indicate that nutrients are better utilized in the Southern Ocean under glacial conditions. New results from the subarctic Pacific suggest that enhanced convection of nutrient-rich Glacial North Pacific Intermediate Water (GNPIW) contributes to changes in nutrient concentrations in equatorial sub-thermocline water masses during MIS 2. However, the interplay between SOIW versus GNPIW and its influence on the nutrient distribution in the EEP spanning more than one glacial cycle are still not understood. We present a carbon isotope (d13C) record of sub-thermocline waters derived from deep-dwelling planktonic foraminifera Globorotaloides hexagonus in the EEP, which is compared with published d13C records around the Pacific. Results indicate enhanced influence of GNPIW during MIS 6 and MIS 2 compared to today with largest contributions of northern-sourced intermediate waters during glacial maxima. These observations suggest a mechanistic link between relative contributions of northern and southern intermediate waters and past EEP nutrient concentrations. A switch from increased GNPIW (decreased SOIW) to diminished GNPIW (enhanced SOIW) influence on equatorial sub-thermocline waters is recognized during glacial terminations and marks changes to modern-like conditions in nutrient concentrations and biological productivity in the EEP. Article in Journal/Newspaper Planktonic foraminifera Southern Ocean Subarctic DataCite Metadata Store (German National Library of Science and Technology) Andreas ENVELOPE(-60.729,-60.729,-64.008,-64.008) Pacific Southern Ocean |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
spellingShingle |
Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Rippert, Nadine Max, Lars Mackensen, Andreas Cacho, Isabel Povea, Patricia Tiedemann, Ralf Age and stable isotopic record of high and lower latitude of the Pacific, supplement to: Rippert, Nadine; Max, Lars; Mackensen, Andreas; Cacho, Isabel; Povea, Patricia; Tiedemann, Ralf (2017): Alternating influence of northern versus southern-sourced water masses on the equatorial Pacific subthermocline during the past 240 ka. Paleoceanography, 32(11), 1256-1274 |
topic_facet |
Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
description |
The Eastern Equatorial Pacific (EEP) is a key area to understand past oceanic processes that control atmospheric CO2 concentrations. Many studies argue for higher nutrient concentrations by enhanced nutrient transfer via Southern Ocean Intermediate Water (SOIW) to the low-latitude Pacific during glacials. Recent studies, however, argue against SOIW as the primary nutrient source, at least during early Marine Isotope Stage 2 (MIS 2), as proxy-data indicate that nutrients are better utilized in the Southern Ocean under glacial conditions. New results from the subarctic Pacific suggest that enhanced convection of nutrient-rich Glacial North Pacific Intermediate Water (GNPIW) contributes to changes in nutrient concentrations in equatorial sub-thermocline water masses during MIS 2. However, the interplay between SOIW versus GNPIW and its influence on the nutrient distribution in the EEP spanning more than one glacial cycle are still not understood. We present a carbon isotope (d13C) record of sub-thermocline waters derived from deep-dwelling planktonic foraminifera Globorotaloides hexagonus in the EEP, which is compared with published d13C records around the Pacific. Results indicate enhanced influence of GNPIW during MIS 6 and MIS 2 compared to today with largest contributions of northern-sourced intermediate waters during glacial maxima. These observations suggest a mechanistic link between relative contributions of northern and southern intermediate waters and past EEP nutrient concentrations. A switch from increased GNPIW (decreased SOIW) to diminished GNPIW (enhanced SOIW) influence on equatorial sub-thermocline waters is recognized during glacial terminations and marks changes to modern-like conditions in nutrient concentrations and biological productivity in the EEP. |
format |
Article in Journal/Newspaper |
author |
Rippert, Nadine Max, Lars Mackensen, Andreas Cacho, Isabel Povea, Patricia Tiedemann, Ralf |
author_facet |
Rippert, Nadine Max, Lars Mackensen, Andreas Cacho, Isabel Povea, Patricia Tiedemann, Ralf |
author_sort |
Rippert, Nadine |
title |
Age and stable isotopic record of high and lower latitude of the Pacific, supplement to: Rippert, Nadine; Max, Lars; Mackensen, Andreas; Cacho, Isabel; Povea, Patricia; Tiedemann, Ralf (2017): Alternating influence of northern versus southern-sourced water masses on the equatorial Pacific subthermocline during the past 240 ka. Paleoceanography, 32(11), 1256-1274 |
title_short |
Age and stable isotopic record of high and lower latitude of the Pacific, supplement to: Rippert, Nadine; Max, Lars; Mackensen, Andreas; Cacho, Isabel; Povea, Patricia; Tiedemann, Ralf (2017): Alternating influence of northern versus southern-sourced water masses on the equatorial Pacific subthermocline during the past 240 ka. Paleoceanography, 32(11), 1256-1274 |
title_full |
Age and stable isotopic record of high and lower latitude of the Pacific, supplement to: Rippert, Nadine; Max, Lars; Mackensen, Andreas; Cacho, Isabel; Povea, Patricia; Tiedemann, Ralf (2017): Alternating influence of northern versus southern-sourced water masses on the equatorial Pacific subthermocline during the past 240 ka. Paleoceanography, 32(11), 1256-1274 |
title_fullStr |
Age and stable isotopic record of high and lower latitude of the Pacific, supplement to: Rippert, Nadine; Max, Lars; Mackensen, Andreas; Cacho, Isabel; Povea, Patricia; Tiedemann, Ralf (2017): Alternating influence of northern versus southern-sourced water masses on the equatorial Pacific subthermocline during the past 240 ka. Paleoceanography, 32(11), 1256-1274 |
title_full_unstemmed |
Age and stable isotopic record of high and lower latitude of the Pacific, supplement to: Rippert, Nadine; Max, Lars; Mackensen, Andreas; Cacho, Isabel; Povea, Patricia; Tiedemann, Ralf (2017): Alternating influence of northern versus southern-sourced water masses on the equatorial Pacific subthermocline during the past 240 ka. Paleoceanography, 32(11), 1256-1274 |
title_sort |
age and stable isotopic record of high and lower latitude of the pacific, supplement to: rippert, nadine; max, lars; mackensen, andreas; cacho, isabel; povea, patricia; tiedemann, ralf (2017): alternating influence of northern versus southern-sourced water masses on the equatorial pacific subthermocline during the past 240 ka. paleoceanography, 32(11), 1256-1274 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2017 |
url |
https://dx.doi.org/10.1594/pangaea.882520 https://doi.pangaea.de/10.1594/PANGAEA.882520 |
long_lat |
ENVELOPE(-60.729,-60.729,-64.008,-64.008) |
geographic |
Andreas Pacific Southern Ocean |
geographic_facet |
Andreas Pacific Southern Ocean |
genre |
Planktonic foraminifera Southern Ocean Subarctic |
genre_facet |
Planktonic foraminifera Southern Ocean Subarctic |
op_relation |
https://dx.doi.org/10.1002/2017pa003133 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.882520 https://doi.org/10.1002/2017pa003133 |
_version_ |
1766170449380638720 |