Marine and terrestrial biomarkers in the Western Mediterranean during the Early-Middle Pleistocene transition
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2025
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| _version_ | 1867169483525718016 |
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| author | Marino, Maria Rodrigues, Teresa Quivelli, Ornella Girone, Angela Maiorano, Patrizia Bassinot, Franck |
| author_facet | Marino, Maria Rodrigues, Teresa Quivelli, Ornella Girone, Angela Maiorano, Patrizia Bassinot, Franck |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Marine and terrestrial biomarkers analyses have been carried out on sediments from Ocean Drilling Program Site 975 in the Algero-Balearic basin (38°53.8′ N, 4°30.6′ E), through late marine isotope stage (MIS) 20-19 (from 800 to 756 thousand years ago). Marine and terrestrial biomarkers have been processed at the Instituto Português do Mar e da Atmosfera (Portugal). The patterns of C37 alkenone concentration and NAR provided reliable information on past paleoproductivity changes. The Alkanol Preservation Index (API) obtained by the relative proportion of n-hexacosan-1-ol (C26OH) to the sum of C26OH plus n-nonacosane (C29) [API = C26OH/(C26OH + C29)], was used as a proxy of sea bottom ventilation in the basin. Sea surface temperature (SST) was estimated calculating the alkenone Uk'37 index that is based on the di- and tri-unsaturated alkenone ratio [(C37:2)/(C37:2 + C37:3)] and converted into temperature values using the global core top calibration of annual SST [Uk'37 = (0.033*SST) + 0.044], with a methodology uncertainty of ±0.5 ◦C. Tetra-unsaturated compound (C37:4) was considered as an indicator of lower temperature and low salinity waters and linked to polar and subpolar water influx into the Western Mediterranean. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_982551 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Marine and terrestrial biomarkers in the Western Mediterranean during the Early-Middle Pleistocene transition Marino, Maria Rodrigues, Teresa Quivelli, Ornella Girone, Angela Maiorano, Patrizia Bassinot, Franck 161-975; Algero-Balearic basin; Alkanol preservation index; Alkenone, C37:2; Alkenone, C37:2, per unit sediment mass; Alkenone, C37:3; Alkenone, C37:3, per unit sediment mass; Alkenone, C37:4; Alkenone, C37:4, per unit sediment mass; Alkenones; alkenone SST; Biomarkers; Coccolithophores; COMPCORE; Composite Core; Depth, composite; Joides Resolution; Leg161; marine biomarkers; Ocean Drilling Program; ODP; Oxygen isotopes; Sea surface temperature; terrestrial biomarkers; Western Basin Marine and terrestrial biomarkers analyses have been carried out on sediments from Ocean Drilling Program Site 975 in the Algero-Balearic basin (38°53.8′ N, 4°30.6′ E), through late marine isotope stage (MIS) 20-19 (from 800 to 756 thousand years ago). Marine and terrestrial biomarkers have been processed at the Instituto Português do Mar e da Atmosfera (Portugal). The patterns of C37 alkenone concentration and NAR provided reliable information on past paleoproductivity changes. The Alkanol Preservation Index (API) obtained by the relative proportion of n-hexacosan-1-ol (C26OH) to the sum of C26OH plus n-nonacosane (C29) [API = C26OH/(C26OH + C29)], was used as a proxy of sea bottom ventilation in the basin. Sea surface temperature (SST) was estimated calculating the alkenone Uk'37 index that is based on the di- and tri-unsaturated alkenone ratio [(C37:2)/(C37:2 + C37:3)] and converted into temperature values using the global core top calibration of annual SST [Uk'37 = (0.033*SST) + 0.044], with a methodology uncertainty of ±0.5 ◦C. Tetra-unsaturated compound (C37:4) was considered as an indicator of lower temperature and low salinity waters and linked to polar and subpolar water influx into the Western Mediterranean. |
| title | Marine and terrestrial biomarkers in the Western Mediterranean during the Early-Middle Pleistocene transition |
| topic | 161-975; Algero-Balearic basin; Alkanol preservation index; Alkenone, C37:2; Alkenone, C37:2, per unit sediment mass; Alkenone, C37:3; Alkenone, C37:3, per unit sediment mass; Alkenone, C37:4; Alkenone, C37:4, per unit sediment mass; Alkenones; alkenone SST; Biomarkers; Coccolithophores; COMPCORE; Composite Core; Depth, composite; Joides Resolution; Leg161; marine biomarkers; Ocean Drilling Program; ODP; Oxygen isotopes; Sea surface temperature; terrestrial biomarkers; Western Basin |
| url | https://doi.org/10.1594/PANGAEA.982551 |