Publicación:
Climate-driven changes in sedimentation rate influence phosphorus burial along continental margins of the northwestern Mediterranean
Climate-driven changes in sedimentation rate influence phosphorus burial along continental margins of the northwestern Mediterranean
| dc.contributor.author | Cortina, Aleix | es_PE |
| dc.contributor.author | Filippelli, Gabriel | es_PE |
| dc.contributor.author | Ochoa, Diana | es_PE |
| dc.contributor.author | Sierro, Francisco Javier | es_PE |
| dc.contributor.author | Flores, José-Abel | es_PE |
| dc.contributor.author | Grimalt, Joan O. | es_PE |
| dc.date.accessioned | 2024-05-30T23:13:38Z | |
| dc.date.available | 2024-05-30T23:13:38Z | |
| dc.date.issued | 2018-07 | |
| dc.description.abstract | The burial of phosphorus (P) in continental margin sediments is a critical component of the marine reactive P budget, and thus an important factor in marine biological productivity. We determined downcore records of P from a site drilled on the upper slope of the Gulf of Lions (PRGL 1), northwestern Mediterranean Sea. Changes in total P content were monitored from Marine Isotope Stage (MIS) 6 to MIS 11. In addition, in two selected intervals (248–277 ka and 306–342 ka) the total P record was expanded by adding detailed geochemical analyses of the various P fractions, including oxyhydroxide-associated P, authigenic P, detrital P and organic P. Increased sedimentation rates during glacials owing to seaward migration of the Rhone's mouth, enhanced the burial of reactive P (oxyhydroxide-associated + authigenic + organic) phases by decreasing its time at the reactive sediment/water interface, in turn resulting in increasing proportion of authigenic to detrital phosphorus. The inverse was found for interglacial stages. The effects of glacial/interglacial variation in sedimentation rate over P geochemistry resulted in changes in sediment-water interface oxygenation, as well as in the efficiency of P burial, as shown by (C:P)org and Corg:Preact proxies respectively. Two events of high P deposition associated with authigenic P formation, at 335 ka (Paut1) and 275 ka (Paut2), were associated with periods of rapid disintegration of North Atlantic ice sheets leading to Ice Rafted Debris (IRD) deposition. These high P deposition events appear to be linked to short warm periods that followed cold episodes. Enhanced continental runoff owing to more humid conditions during short warm episodes could play a critical role for enhanced biogenic productivity and posterior authigenic P accumulation. | |
| dc.description.sponsorship | Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concytec | |
| dc.identifier.doi | https://doi.org/10.1016/j.palaeo.2018.03.010 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12390/1277 | |
| dc.language.iso | eng | |
| dc.publisher | Elsevier | |
| dc.relation.ispartof | Palaeogeography, Palaeoclimatology, Palaeoecology | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.subject | Terminación IV | |
| dc.subject | Paleoredox | es_PE |
| dc.subject | Paleoproductividad del fósforo | es_PE |
| dc.subject | Golfo de León | es_PE |
| dc.subject | MIS 8 | es_PE |
| dc.subject.ocde | https://purl.org/pe-repo/ocde/ford#1.06.16 | |
| dc.title | Climate-driven changes in sedimentation rate influence phosphorus burial along continental margins of the northwestern Mediterranean | |
| dc.type | info:eu-repo/semantics/article | |
| dspace.entity.type | Publication |