Concentrations of export production indicators and corrected and non-corrected accumulation rates of indicators of opal, Carbonates, Fe, TOC and Barium excess from core PS97/093-2 over the past 1.4 Ma
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2025
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| _version_ | 1867169160866299904 |
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| author | Toyos, Maria H Lamy, Frank Lange, Carina Beatriz Abell, Jordan T Lembke-Jene, Lester Arz, Helge Wolfgang Winckler, Gisela |
| author_facet | Toyos, Maria H Lamy, Frank Lange, Carina Beatriz Abell, Jordan T Lembke-Jene, Lester Arz, Helge Wolfgang Winckler, Gisela |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Studying oceanic particle fluxes from sediment records is an important component of paleoceanography. Traditionally, we calculate these fluxes using a combination of linear sedimentation rates derived from age models and sediment density, known as age model-derived bulk mass accumulation rates (BMAR). However, BMAR and the resulting paleoceanographic interpretations may suffer from substantial errors if lateral redistribution of sediments is not considered. In fact, this is expected to be a common phenomenon in the Southern Ocean due to the strong bottom water circulation induced by the Antarctic Circumpolar Current. In the study associated to this dataset, we assess export production and its drivers over the past ~1.4 Myr near the Drake Passage entrance using BMAR of biogenic Barium, organic carbon, biogenic opal, calcium carbonate, and iron from sediment core PS97/093-2, all of which are corrected for lateral sediment redistribution (corr-BMAR). To quantify this correction, we explore the relationship between sortable silt as a bottom current strength proxy and 230Th-derived focusing factors as indicators of lateral redistribution of sediments, respectively. Therefore, this dataset includes the following data: Concentrations of export production indicators (opal, Carbonates, Fe, total organic carbon, and excess of Barium), dry bulk density, sortable silt (averaged between tie points), calculated focusing factors, and corrected and non-corrected accumulation rates of export production indicators of core PS97/093-2 over the past 1.4 million years. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_968898 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Concentrations of export production indicators and corrected and non-corrected accumulation rates of indicators of opal, Carbonates, Fe, TOC and Barium excess from core PS97/093-2 over the past 1.4 Ma Toyos, Maria H Lamy, Frank Lange, Carina Beatriz Abell, Jordan T Lembke-Jene, Lester Arz, Helge Wolfgang Winckler, Gisela Accumulation rate; Accumulation rate, bulk mass; Accumulation rate, bulk mass, barium, excess; Accumulation rate, bulk mass, barium, excess, standard error; Accumulation rate, bulk mass, calcium carbonate; Accumulation rate, bulk mass, calcium carbonate, standard error; Accumulation rate, bulk mass, carbon, organic, total; Accumulation rate, bulk mass, carbon, organic, total, standard error; Accumulation rate, bulk mass, iron; Accumulation rate, bulk mass, iron, standard error; Accumulation rate, bulk mass, opal; Accumulation rate, bulk mass, opal, standard error; Accumulation rate, bulk mass, standard error; AGE; ANT-XXXI/3; Barium excess; Calcium carbonate; Calculated; Carbon, organic, total; Changing Earth – Sustaining our Future; Corrected; Density, dry bulk; DEPTH, sediment/rock; Export Production; focusing factor; Focusing factor; Helmholtz_ChangingEarth; Iron; Opal, biogenic silica; Paleoceanography; paleoproductivity.; PC; Piston corer; Polarstern; PS97; PS97/093-2; Sortable-silt mean; Southern Ocean; South Pacific Ocean; Subantarctic zone Studying oceanic particle fluxes from sediment records is an important component of paleoceanography. Traditionally, we calculate these fluxes using a combination of linear sedimentation rates derived from age models and sediment density, known as age model-derived bulk mass accumulation rates (BMAR). However, BMAR and the resulting paleoceanographic interpretations may suffer from substantial errors if lateral redistribution of sediments is not considered. In fact, this is expected to be a common phenomenon in the Southern Ocean due to the strong bottom water circulation induced by the Antarctic Circumpolar Current. In the study associated to this dataset, we assess export production and its drivers over the past ~1.4 Myr near the Drake Passage entrance using BMAR of biogenic Barium, organic carbon, biogenic opal, calcium carbonate, and iron from sediment core PS97/093-2, all of which are corrected for lateral sediment redistribution (corr-BMAR). To quantify this correction, we explore the relationship between sortable silt as a bottom current strength proxy and 230Th-derived focusing factors as indicators of lateral redistribution of sediments, respectively. Therefore, this dataset includes the following data: Concentrations of export production indicators (opal, Carbonates, Fe, total organic carbon, and excess of Barium), dry bulk density, sortable silt (averaged between tie points), calculated focusing factors, and corrected and non-corrected accumulation rates of export production indicators of core PS97/093-2 over the past 1.4 million years. |
| title | Concentrations of export production indicators and corrected and non-corrected accumulation rates of indicators of opal, Carbonates, Fe, TOC and Barium excess from core PS97/093-2 over the past 1.4 Ma |
| topic | Accumulation rate; Accumulation rate, bulk mass; Accumulation rate, bulk mass, barium, excess; Accumulation rate, bulk mass, barium, excess, standard error; Accumulation rate, bulk mass, calcium carbonate; Accumulation rate, bulk mass, calcium carbonate, standard error; Accumulation rate, bulk mass, carbon, organic, total; Accumulation rate, bulk mass, carbon, organic, total, standard error; Accumulation rate, bulk mass, iron; Accumulation rate, bulk mass, iron, standard error; Accumulation rate, bulk mass, opal; Accumulation rate, bulk mass, opal, standard error; Accumulation rate, bulk mass, standard error; AGE; ANT-XXXI/3; Barium excess; Calcium carbonate; Calculated; Carbon, organic, total; Changing Earth – Sustaining our Future; Corrected; Density, dry bulk; DEPTH, sediment/rock; Export Production; focusing factor; Focusing factor; Helmholtz_ChangingEarth; Iron; Opal, biogenic silica; Paleoceanography; paleoproductivity.; PC; Piston corer; Polarstern; PS97; PS97/093-2; Sortable-silt mean; Southern Ocean; South Pacific Ocean; Subantarctic zone |
| url | https://doi.org/10.1594/PANGAEA.968898 |