(Table S1) N15 isotope ratios, age determination and accumulation rates of sediment core HLY02-02-17
In a piston core from the central Bering Sea, diatom microfossil-bound N isotopes and the concentrations of opal, biogenic barium, calcium carbonate, and organic N are measured over the last glacial/interglacial cycle. Compared to the interglacial sections of the core, the sediments of the last ice...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.833622 2023-05-15T15:43:14+02:00 (Table S1) N15 isotope ratios, age determination and accumulation rates of sediment core HLY02-02-17 Brunelle, Brigitte G Sigman, Daniel M Cook, Mea S Keigwin, Lloyd D Haug, Gerald H Plessen, Birgit Schettler, Georg Jaccard, Samuel L LATITUDE: 53.933000 * LONGITUDE: -178.698800 * DATE/TIME START: 2002-06-23T00:00:00 * DATE/TIME END: 2002-06-23T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.085 m * MAXIMUM DEPTH, sediment/rock: 15.360 m 2014-06-25 text/tab-separated-values, 1891 data points https://doi.pangaea.de/10.1594/PANGAEA.833622 https://doi.org/10.1594/PANGAEA.833622 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.833622 https://doi.org/10.1594/PANGAEA.833622 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Brunelle, Brigitte G; Sigman, Daniel M; Cook, Mea S; Keigwin, Lloyd D; Haug, Gerald H; Plessen, Birgit; Schettler, Georg; Jaccard, Samuel L (2007): Evidence from diatom-bound nitrogen isotopes for subarctic Pacific stratification during the last ice age and a link to North Pacific denitrification changes. Paleoceanography, 22(1), PA1215, https://doi.org/10.1029/2005PA001205 Accumulation rate barium calcium mass opal AGE 14C AMS 14C calibrated dated dated standard deviation Aluminium biogenic Calcium carbonate Calendar age maximum/old minimum/young DEPTH sediment/rock HEA02 Healy HLY0202 HLY02-02-17 JPC Jumbo Piston Core Neogloboquadrina pachyderma sinistral δ18O Nitrogen total Normalized North Pacific biogenic silica Uvigerina sp. δ15N bulk sediment Dataset 2014 ftpangaea https://doi.org/10.1594/PANGAEA.833622 https://doi.org/10.1029/2005PA001205 2023-01-20T09:03:26Z In a piston core from the central Bering Sea, diatom microfossil-bound N isotopes and the concentrations of opal, biogenic barium, calcium carbonate, and organic N are measured over the last glacial/interglacial cycle. Compared to the interglacial sections of the core, the sediments of the last ice age are characterized by 3 per mil higher diatom-bound d15N, 70 wt % lower opal content and 1200 ppm lower biogenic barium. Taken together and with constraints on sediment accumulation rate, these results suggest a reduced supply of nitrate to the surface due to stronger stratification of the upper water column of the Bering Sea during glacial times, with more complete nitrate consumption resulting from continued iron supply through atmospheric deposition. This finding extends the body of evidence for a pervasive link between cold climates and polar ocean stratification. In addition, we hypothesize that more complete nutrient consumption in the glacial age subarctic Pacific contributed to the previously observed ice age reduction in suboxia and denitrification in the eastern tropical North Pacific by lowering the nutrient content of the intermediate-depth water formed in the subpolar North Pacific. In the deglacial interval of the Bering Sea record, two apparent peaks in export productivity are associated with maxima in diatom-bound and bulk sediment d15N. The high d15N in these intervals may have resulted from greater surface nutrient consumption during this period. However, the synchroneity of the deglacial peaks in the Bering Sea with similar bulk sediment d15N changes in the eastern Pacific margin and the presence of sediment lamination within the Bering Sea during the deposition of the productivity peaks raise the possibility that both regional and local denitrification worked to raise the d15N of the nitrate feeding Bering Sea surface waters at these times. Dataset Bering Sea Neogloboquadrina pachyderma Subarctic PANGAEA - Data Publisher for Earth & Environmental Science Bering Sea Pacific ENVELOPE(-178.698800,-178.698800,53.933000,53.933000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Accumulation rate barium calcium mass opal AGE 14C AMS 14C calibrated dated dated standard deviation Aluminium biogenic Calcium carbonate Calendar age maximum/old minimum/young DEPTH sediment/rock HEA02 Healy HLY0202 HLY02-02-17 JPC Jumbo Piston Core Neogloboquadrina pachyderma sinistral δ18O Nitrogen total Normalized North Pacific biogenic silica Uvigerina sp. δ15N bulk sediment |
spellingShingle |
Accumulation rate barium calcium mass opal AGE 14C AMS 14C calibrated dated dated standard deviation Aluminium biogenic Calcium carbonate Calendar age maximum/old minimum/young DEPTH sediment/rock HEA02 Healy HLY0202 HLY02-02-17 JPC Jumbo Piston Core Neogloboquadrina pachyderma sinistral δ18O Nitrogen total Normalized North Pacific biogenic silica Uvigerina sp. δ15N bulk sediment Brunelle, Brigitte G Sigman, Daniel M Cook, Mea S Keigwin, Lloyd D Haug, Gerald H Plessen, Birgit Schettler, Georg Jaccard, Samuel L (Table S1) N15 isotope ratios, age determination and accumulation rates of sediment core HLY02-02-17 |
topic_facet |
Accumulation rate barium calcium mass opal AGE 14C AMS 14C calibrated dated dated standard deviation Aluminium biogenic Calcium carbonate Calendar age maximum/old minimum/young DEPTH sediment/rock HEA02 Healy HLY0202 HLY02-02-17 JPC Jumbo Piston Core Neogloboquadrina pachyderma sinistral δ18O Nitrogen total Normalized North Pacific biogenic silica Uvigerina sp. δ15N bulk sediment |
description |
In a piston core from the central Bering Sea, diatom microfossil-bound N isotopes and the concentrations of opal, biogenic barium, calcium carbonate, and organic N are measured over the last glacial/interglacial cycle. Compared to the interglacial sections of the core, the sediments of the last ice age are characterized by 3 per mil higher diatom-bound d15N, 70 wt % lower opal content and 1200 ppm lower biogenic barium. Taken together and with constraints on sediment accumulation rate, these results suggest a reduced supply of nitrate to the surface due to stronger stratification of the upper water column of the Bering Sea during glacial times, with more complete nitrate consumption resulting from continued iron supply through atmospheric deposition. This finding extends the body of evidence for a pervasive link between cold climates and polar ocean stratification. In addition, we hypothesize that more complete nutrient consumption in the glacial age subarctic Pacific contributed to the previously observed ice age reduction in suboxia and denitrification in the eastern tropical North Pacific by lowering the nutrient content of the intermediate-depth water formed in the subpolar North Pacific. In the deglacial interval of the Bering Sea record, two apparent peaks in export productivity are associated with maxima in diatom-bound and bulk sediment d15N. The high d15N in these intervals may have resulted from greater surface nutrient consumption during this period. However, the synchroneity of the deglacial peaks in the Bering Sea with similar bulk sediment d15N changes in the eastern Pacific margin and the presence of sediment lamination within the Bering Sea during the deposition of the productivity peaks raise the possibility that both regional and local denitrification worked to raise the d15N of the nitrate feeding Bering Sea surface waters at these times. |
format |
Dataset |
author |
Brunelle, Brigitte G Sigman, Daniel M Cook, Mea S Keigwin, Lloyd D Haug, Gerald H Plessen, Birgit Schettler, Georg Jaccard, Samuel L |
author_facet |
Brunelle, Brigitte G Sigman, Daniel M Cook, Mea S Keigwin, Lloyd D Haug, Gerald H Plessen, Birgit Schettler, Georg Jaccard, Samuel L |
author_sort |
Brunelle, Brigitte G |
title |
(Table S1) N15 isotope ratios, age determination and accumulation rates of sediment core HLY02-02-17 |
title_short |
(Table S1) N15 isotope ratios, age determination and accumulation rates of sediment core HLY02-02-17 |
title_full |
(Table S1) N15 isotope ratios, age determination and accumulation rates of sediment core HLY02-02-17 |
title_fullStr |
(Table S1) N15 isotope ratios, age determination and accumulation rates of sediment core HLY02-02-17 |
title_full_unstemmed |
(Table S1) N15 isotope ratios, age determination and accumulation rates of sediment core HLY02-02-17 |
title_sort |
(table s1) n15 isotope ratios, age determination and accumulation rates of sediment core hly02-02-17 |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.833622 https://doi.org/10.1594/PANGAEA.833622 |
op_coverage |
LATITUDE: 53.933000 * LONGITUDE: -178.698800 * DATE/TIME START: 2002-06-23T00:00:00 * DATE/TIME END: 2002-06-23T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.085 m * MAXIMUM DEPTH, sediment/rock: 15.360 m |
long_lat |
ENVELOPE(-178.698800,-178.698800,53.933000,53.933000) |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea Neogloboquadrina pachyderma Subarctic |
genre_facet |
Bering Sea Neogloboquadrina pachyderma Subarctic |
op_source |
Supplement to: Brunelle, Brigitte G; Sigman, Daniel M; Cook, Mea S; Keigwin, Lloyd D; Haug, Gerald H; Plessen, Birgit; Schettler, Georg; Jaccard, Samuel L (2007): Evidence from diatom-bound nitrogen isotopes for subarctic Pacific stratification during the last ice age and a link to North Pacific denitrification changes. Paleoceanography, 22(1), PA1215, https://doi.org/10.1029/2005PA001205 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.833622 https://doi.org/10.1594/PANGAEA.833622 |
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.833622 https://doi.org/10.1029/2005PA001205 |
_version_ |
1766377285958500352 |