Stable isotopes, radionuclides, and calculated sea surface temperature of two sediment cores in the Sicily Channel
Fuente:
PANGAEA
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
2016
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1867171369821667328 |
|---|---|
| author | Incarbona, Alessandro Martrat, Belén Mortyn, P Graham Sprovieri, Mario Ziveri, Patrizia Gogou, Alexandra Jordà, Gabriel Xoplaki, Elena Luterbacher, Jürg Langone, Leonardo Marino, Gianluca Rodriguez-Sanz, Laura Triantaphyllou, Maria Di Stefano, Enrico Grimalt, Joan O Tranchida, Giorgio Sprovieri, Rodolfo Mazzola, Salvatore |
| author_facet | Incarbona, Alessandro Martrat, Belén Mortyn, P Graham Sprovieri, Mario Ziveri, Patrizia Gogou, Alexandra Jordà, Gabriel Xoplaki, Elena Luterbacher, Jürg Langone, Leonardo Marino, Gianluca Rodriguez-Sanz, Laura Triantaphyllou, Maria Di Stefano, Enrico Grimalt, Joan O Tranchida, Giorgio Sprovieri, Rodolfo Mazzola, Salvatore |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Eastern Mediterranean Transient (EMT) occurred in the Aegean Sea from 1988 to 1995 and is the most significant intermediate-to-deep Mediterranean overturning perturbation reported by instrumental records. The EMT was likely caused by accumulation of high salinity waters in the Levantine and enhanced heat loss in the Aegean Sea, coupled with surface water freshening in the Sicily Channel. It is still unknown whether similar transients occurred in the past and, if so, what their forcing processes were. In this study, sediments from the Sicily Channel document surface water freshening (SCFR) at 1910±12, 1812±18, 1725±25 and 1580±30 CE. A regional ocean hindcast links SCFR to enhanced deep-water production and in turn to strengthened Mediterranean thermohaline circulation. Independent evidence collected in the Aegean Sea supports this reconstruction, showing that enhanced bottom water ventilation in the Eastern Mediterranean was associated with each SCFR event. Comparison between the records and multi-decadal atmospheric circulation patterns and climatic external forcings indicates that Mediterranean circulation destabilisation occurs during positive North Atlantic Oscillation (NAO) and negative Atlantic Multidecadal Oscillation (AMO) phases, reduced solar activity and strong tropical volcanic eruptions. They may have recurrently produced favourable deep-water formation conditions, both increasing salinity and reducing temperature on multi-decadal time scales. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_861974 |
| institution | PANGAEA |
| language | en |
| publishDate | 2016 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Stable isotopes, radionuclides, and calculated sea surface temperature of two sediment cores in the Sicily Channel Incarbona, Alessandro Martrat, Belén Mortyn, P Graham Sprovieri, Mario Ziveri, Patrizia Gogou, Alexandra Jordà, Gabriel Xoplaki, Elena Luterbacher, Jürg Langone, Leonardo Marino, Gianluca Rodriguez-Sanz, Laura Triantaphyllou, Maria Di Stefano, Enrico Grimalt, Joan O Tranchida, Giorgio Sprovieri, Rodolfo Mazzola, Salvatore Climate Change: Learning from the past climate; Mediterranean Sea Acidification in a Changing Climate; MedSeA; Past4Future The Eastern Mediterranean Transient (EMT) occurred in the Aegean Sea from 1988 to 1995 and is the most significant intermediate-to-deep Mediterranean overturning perturbation reported by instrumental records. The EMT was likely caused by accumulation of high salinity waters in the Levantine and enhanced heat loss in the Aegean Sea, coupled with surface water freshening in the Sicily Channel. It is still unknown whether similar transients occurred in the past and, if so, what their forcing processes were. In this study, sediments from the Sicily Channel document surface water freshening (SCFR) at 1910±12, 1812±18, 1725±25 and 1580±30 CE. A regional ocean hindcast links SCFR to enhanced deep-water production and in turn to strengthened Mediterranean thermohaline circulation. Independent evidence collected in the Aegean Sea supports this reconstruction, showing that enhanced bottom water ventilation in the Eastern Mediterranean was associated with each SCFR event. Comparison between the records and multi-decadal atmospheric circulation patterns and climatic external forcings indicates that Mediterranean circulation destabilisation occurs during positive North Atlantic Oscillation (NAO) and negative Atlantic Multidecadal Oscillation (AMO) phases, reduced solar activity and strong tropical volcanic eruptions. They may have recurrently produced favourable deep-water formation conditions, both increasing salinity and reducing temperature on multi-decadal time scales. |
| title | Stable isotopes, radionuclides, and calculated sea surface temperature of two sediment cores in the Sicily Channel |
| topic | Climate Change: Learning from the past climate; Mediterranean Sea Acidification in a Changing Climate; MedSeA; Past4Future |
| url | https://doi.org/10.1594/PANGAEA.861974 |