Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
The demise of the early Eocene greenhouse - Decoupled deep and surface water cooling in the eastern North Atlantic
Bornemann, A.; D'haenens, S.; Norris, R.D.; Speijer, R.P. (2016). The demise of the early Eocene greenhouse - Decoupled deep and surface water cooling in the eastern North Atlantic. Global Planet. Change 145: 130-140. https://dx.doi.org/10.1016/j.gloplacha.2016.08.010
In: Global and Planetary Change. Elsevier: Amsterdam; New York; Oxford; Tokyo. ISSN 0921-8181; e-ISSN 1872-6364
|  |
| Trefwoorden |
Foraminifera [WoRMS]
Marien/Kust |
| Author keywords |
Paleocene; Eocene; North Atlantic; Paleoclimate; Foraminifera; Stableisotopes |
| Auteurs | | Top |
- Bornemann, A.
- D'haenens, S.
- Norris, R.D.
- Speijer, R.P.
|
|
|
| Abstract |
Early Paleogene greenhouse climate culminated during the early Eocene Climatic optimum(EECO, 50 to 53 Ma). This episode of global warmth is subsequently followed by an almost 20 million year-long cooling trend leading to the Eocene-Oligocene glaciation of Antarctica. Here we present the first detailed planktic and benthic foraminiferal isotope single site record (δ13C, δ18O) of late Paleocene to middle Eocene age from the North Atlantic (Deep Sea Drilling Project Site 401, Bay of Biscay). Good core recovery in combination with well preserved foraminifera makes this site suitable for correlations and comparison with previously published long-term records from the Pacific Ocean (e.g. Allison Guyot, Shatsky Rise), the Southern Ocean (Maud Rise) and the equatorial Atlantic (Demerara Rise).Whereas our North Atlantic benthic foraminiferal δ18O and δ13C data agree with the global trend showing the long-term shift toward heavier δ18O values, we only observe minor surface water δ18O changes during the middle Eocene (if at all) in planktic foraminiferal data. Apparently, the surface North Atlantic did not cool substantially during the middle Eocene. Thus, the North Atlantic appears to have had a different surface ocean cooling history during the middle Eocene than the southern hemisphere, whereas cooler deep-water masses were comparatively well mixed. Our results are in agreement with previously published findings from Tanzania, which also support the idea of a muted post-EECO surface-water cooling outside the southern highlatitudes. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
