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| Main Authors: | , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2012
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| Online Access: | https://doi.org/10.1594/PANGAEA.780099 |
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| _version_ | 1867171363167404032 |
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| author | Kandiano, Evgenia S Bauch, Henning A Fahl, Kirsten Helmke, Jan Peter Röhl, Ursula Pérez-Folgado, Marta Cacho, Isabel |
| author_facet | Kandiano, Evgenia S Bauch, Henning A Fahl, Kirsten Helmke, Jan Peter Röhl, Ursula Pérez-Folgado, Marta Cacho, Isabel |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Temporal and spatial patterns in eastern North Atlantic sea-surface temperatures (SST) were reconstructed for marine isotope stage (MIS) 11c using a submeridional transect of five sediment cores. The SST reconstructions are based on planktic foraminiferal abundances and alkenone indices, and are supported by benthic and planktic stable isotope measurements, as well as by ice-rafted debris content in polar and middle latitudes. Additionally, the larger-scale dynamics of the precipitation regime over northern Africa and the western Mediterranean region was evaluated from iron concentrations in marine sediments off NW Africa and planktic d13C in combination with analysis of planktic foraminiferal abundances down to the species level in the Mediterranean Sea. Compared to the modern situation, it is revealed that during entire MIS 11c sensu stricto (ss), i.e., between 420 and 398 ka according to our age models, a cold SST anomaly in the Nordic seas co-existed with a warm SST anomaly in the middle latitudes and the subtropics, resulting in steeper meridional SST gradients than during the Holocene. Such a SST pattern correlates well with a prevalence of a negative mode of the modern North Atlantic Oscillation. We suggest that our scenario might partly explain the longer duration of wet conditions in the northern Africa during MIS 11c compared to the Holocene. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_780099 |
| institution | PANGAEA |
| language | en |
| publishDate | 2012 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sea surface temperature and stable isotopes from 9 cores of the Northeastern Atlantic Kandiano, Evgenia S Bauch, Henning A Fahl, Kirsten Helmke, Jan Peter Röhl, Ursula Pérez-Folgado, Marta Cacho, Isabel 159-958; 161-975; 61F; ARK-II/5; CALYPSO; Calypso Corer; Canarias Sea; COMPCORE; Composite Core; Giant box corer; GIK23063-1; GIK23243-1 PS05/431; GIK23414-8; GKG; Gravity corer (Kiel type); IMAGES V; Jan Mayen Ridge; Joides Resolution; Leg159T; Leg161; M17/2; M2/2; M23414; Marion Dufresne (1995); MD114; MD99-2277; Meteor (1986); North Atlantic Ocean; Norwegian Sea; Polarstern; PS05; PS1243-1; SL; Western Basin Temporal and spatial patterns in eastern North Atlantic sea-surface temperatures (SST) were reconstructed for marine isotope stage (MIS) 11c using a submeridional transect of five sediment cores. The SST reconstructions are based on planktic foraminiferal abundances and alkenone indices, and are supported by benthic and planktic stable isotope measurements, as well as by ice-rafted debris content in polar and middle latitudes. Additionally, the larger-scale dynamics of the precipitation regime over northern Africa and the western Mediterranean region was evaluated from iron concentrations in marine sediments off NW Africa and planktic d13C in combination with analysis of planktic foraminiferal abundances down to the species level in the Mediterranean Sea. Compared to the modern situation, it is revealed that during entire MIS 11c sensu stricto (ss), i.e., between 420 and 398 ka according to our age models, a cold SST anomaly in the Nordic seas co-existed with a warm SST anomaly in the middle latitudes and the subtropics, resulting in steeper meridional SST gradients than during the Holocene. Such a SST pattern correlates well with a prevalence of a negative mode of the modern North Atlantic Oscillation. We suggest that our scenario might partly explain the longer duration of wet conditions in the northern Africa during MIS 11c compared to the Holocene. |
| title | Sea surface temperature and stable isotopes from 9 cores of the Northeastern Atlantic |
| topic | 159-958; 161-975; 61F; ARK-II/5; CALYPSO; Calypso Corer; Canarias Sea; COMPCORE; Composite Core; Giant box corer; GIK23063-1; GIK23243-1 PS05/431; GIK23414-8; GKG; Gravity corer (Kiel type); IMAGES V; Jan Mayen Ridge; Joides Resolution; Leg159T; Leg161; M17/2; M2/2; M23414; Marion Dufresne (1995); MD114; MD99-2277; Meteor (1986); North Atlantic Ocean; Norwegian Sea; Polarstern; PS05; PS1243-1; SL; Western Basin |
| url | https://doi.org/10.1594/PANGAEA.780099 |