(Table A1) Diatom isotope measurements from ODP Hole 145-882A
In comparison to other sectors of the marine system, the palaeoceanography of the subarctic North Pacific Ocean is poorly constrained. New diatom isotope records of d13C, d18O, d30Si (d13Cdiatom, d18Odiatom, and d30Sidiatom) are presented alongside existing geochemical and isotope records to documen...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.856071 2024-09-15T18:38:07+00:00 (Table A1) Diatom isotope measurements from ODP Hole 145-882A Swann, George E A Snelling, Andrea M LATITUDE: 50.363300 * LONGITUDE: 167.600000 * DATE/TIME START: 1992-07-08T10:30:00 * DATE/TIME END: 1992-08-05T17:45:00 * MINIMUM DEPTH, sediment/rock: 3.035 m * MAXIMUM DEPTH, sediment/rock: 7.305 m 2015 text/tab-separated-values, 347 data points https://doi.pangaea.de/10.1594/PANGAEA.856071 https://doi.org/10.1594/PANGAEA.856071 en eng PANGAEA Swann, George E A; Leng, Melanie J; Sloane, Hilary J; Maslin, Mark (2008): Isotope offsets in marine diatom d18O over the last 200 ka. Journal of Quaternary Science, 23(4), 389-400, https://doi.org/10.1002/jqs.1185 https://doi.pangaea.de/10.1594/PANGAEA.856071 https://doi.org/10.1594/PANGAEA.856071 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Swann, George E A; Snelling, Andrea M (2015): Photic zone changes in the north-west Pacific Ocean from MIS 4–5e. Climate of the Past, 11(1), 15-25, https://doi.org/10.5194/cp-11-15-2015 145-882A AGE Carbon Coscinodiscus marginatus Coscinodiscus radiatus DEPTH sediment/rock Diatoms other δ18O δ30Si DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Element analyser CHN Costech and Optima mass spectrometer Joides Resolution Leg145 Mass spectrometer Finnigan MAT 253 North Pacific Ocean Ocean Drilling Program ODP Reference/source Sample code/label δ13C diatom-bound organic matter dataset 2015 ftpangaea https://doi.org/10.1594/PANGAEA.85607110.5194/cp-11-15-201510.1002/jqs.1185 2024-07-24T02:31:33Z In comparison to other sectors of the marine system, the palaeoceanography of the subarctic North Pacific Ocean is poorly constrained. New diatom isotope records of d13C, d18O, d30Si (d13Cdiatom, d18Odiatom, and d30Sidiatom) are presented alongside existing geochemical and isotope records to document changes in photic zone conditions, including nutrient supply and the efficiency of the soft-tissue biological pump, between Marine Isotope Stage (MIS) 4 and MIS 5e. Peaks in opal productivity in MIS 5b/c and MIS 5e are both associated with the breakdown of the regional halocline stratification and increased nutrient supply to the photic zone. Whereas the MIS 5e peak is associated with low rates of nutrient utilisation, the MIS 5b/c peak is associated with significantly higher rates of nutrient utilisation. Both peaks, together with other smaller increases in productivity in MIS 4 and 5a, culminate with a significant increase in freshwater input which strengthens/re-establishes the halocline and limits further upwelling of sub-surface waters to the photic zone. Whilst d30Sidiatom and previously published records of diatom d15N (d15Ndiatom) (Brunelle et al., 2007, 2010) show similar trends until the latter half of MIS 5a, the records become anti-correlated after this juncture and into MIS 4, suggesting a possible change in photic zone state such as may occur with a shift to iron or silicon limitation. Dataset Subarctic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(167.600000,167.600000,50.363300,50.363300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
145-882A AGE Carbon Coscinodiscus marginatus Coscinodiscus radiatus DEPTH sediment/rock Diatoms other δ18O δ30Si DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Element analyser CHN Costech and Optima mass spectrometer Joides Resolution Leg145 Mass spectrometer Finnigan MAT 253 North Pacific Ocean Ocean Drilling Program ODP Reference/source Sample code/label δ13C diatom-bound organic matter |
spellingShingle |
145-882A AGE Carbon Coscinodiscus marginatus Coscinodiscus radiatus DEPTH sediment/rock Diatoms other δ18O δ30Si DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Element analyser CHN Costech and Optima mass spectrometer Joides Resolution Leg145 Mass spectrometer Finnigan MAT 253 North Pacific Ocean Ocean Drilling Program ODP Reference/source Sample code/label δ13C diatom-bound organic matter Swann, George E A Snelling, Andrea M (Table A1) Diatom isotope measurements from ODP Hole 145-882A |
topic_facet |
145-882A AGE Carbon Coscinodiscus marginatus Coscinodiscus radiatus DEPTH sediment/rock Diatoms other δ18O δ30Si DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Element analyser CHN Costech and Optima mass spectrometer Joides Resolution Leg145 Mass spectrometer Finnigan MAT 253 North Pacific Ocean Ocean Drilling Program ODP Reference/source Sample code/label δ13C diatom-bound organic matter |
description |
In comparison to other sectors of the marine system, the palaeoceanography of the subarctic North Pacific Ocean is poorly constrained. New diatom isotope records of d13C, d18O, d30Si (d13Cdiatom, d18Odiatom, and d30Sidiatom) are presented alongside existing geochemical and isotope records to document changes in photic zone conditions, including nutrient supply and the efficiency of the soft-tissue biological pump, between Marine Isotope Stage (MIS) 4 and MIS 5e. Peaks in opal productivity in MIS 5b/c and MIS 5e are both associated with the breakdown of the regional halocline stratification and increased nutrient supply to the photic zone. Whereas the MIS 5e peak is associated with low rates of nutrient utilisation, the MIS 5b/c peak is associated with significantly higher rates of nutrient utilisation. Both peaks, together with other smaller increases in productivity in MIS 4 and 5a, culminate with a significant increase in freshwater input which strengthens/re-establishes the halocline and limits further upwelling of sub-surface waters to the photic zone. Whilst d30Sidiatom and previously published records of diatom d15N (d15Ndiatom) (Brunelle et al., 2007, 2010) show similar trends until the latter half of MIS 5a, the records become anti-correlated after this juncture and into MIS 4, suggesting a possible change in photic zone state such as may occur with a shift to iron or silicon limitation. |
format |
Dataset |
author |
Swann, George E A Snelling, Andrea M |
author_facet |
Swann, George E A Snelling, Andrea M |
author_sort |
Swann, George E A |
title |
(Table A1) Diatom isotope measurements from ODP Hole 145-882A |
title_short |
(Table A1) Diatom isotope measurements from ODP Hole 145-882A |
title_full |
(Table A1) Diatom isotope measurements from ODP Hole 145-882A |
title_fullStr |
(Table A1) Diatom isotope measurements from ODP Hole 145-882A |
title_full_unstemmed |
(Table A1) Diatom isotope measurements from ODP Hole 145-882A |
title_sort |
(table a1) diatom isotope measurements from odp hole 145-882a |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.856071 https://doi.org/10.1594/PANGAEA.856071 |
op_coverage |
LATITUDE: 50.363300 * LONGITUDE: 167.600000 * DATE/TIME START: 1992-07-08T10:30:00 * DATE/TIME END: 1992-08-05T17:45:00 * MINIMUM DEPTH, sediment/rock: 3.035 m * MAXIMUM DEPTH, sediment/rock: 7.305 m |
long_lat |
ENVELOPE(167.600000,167.600000,50.363300,50.363300) |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Supplement to: Swann, George E A; Snelling, Andrea M (2015): Photic zone changes in the north-west Pacific Ocean from MIS 4–5e. Climate of the Past, 11(1), 15-25, https://doi.org/10.5194/cp-11-15-2015 |
op_relation |
Swann, George E A; Leng, Melanie J; Sloane, Hilary J; Maslin, Mark (2008): Isotope offsets in marine diatom d18O over the last 200 ka. Journal of Quaternary Science, 23(4), 389-400, https://doi.org/10.1002/jqs.1185 https://doi.pangaea.de/10.1594/PANGAEA.856071 https://doi.org/10.1594/PANGAEA.856071 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.85607110.5194/cp-11-15-201510.1002/jqs.1185 |
_version_ |
1810482441134014464 |