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
Late Miocene decoupling of oceanic warmth and atmospheric carbon dioxide forcing
LaRiviere, J.P.; Ravelo, A.C.; Crimmins, A.; Dekens, P.S.; Ford, H.L.; Lyle, M.; Wara, M.W. (2012). Late Miocene decoupling of oceanic warmth and atmospheric carbon dioxide forcing. Nature (Lond.) 486(7401): 97-100. https://dx.doi.org/10.1038/nature11200
In: Nature: International Weekly Journal of Science. Nature Publishing Group: London. ISSN 0028-0836; e-ISSN 1476-4687, meer
|  |
| Auteurs | | Top |
- LaRiviere, J.P.
- Ravelo, A.C.
- Crimmins, A.
- Dekens, P.S.
|
- Ford, H.L.
- Lyle, M.
- Wara, M.W.
|
|
| Abstract |
Deep-time palaeoclimate studies are vitally important for developing a complete understanding of climate responses to changes in the atmospheric carbon dioxide concentration (that is, the atmospheric partial pressure of CO2, p(CO2))(1). Although past studies have explored these responses during portions of the Cenozoic era (the most recent 65.5 million years (Myr) of Earth history), comparatively little is known about the climate of the late Miocene (similar to 12-5 Myr ago), an interval with p(CO2) values of only 200-350 parts per million by volume but nearly ice-free conditions in the Northern Hemisphere(2,3) and warmer-than-modern temperatures on the continents(4). Here we present quantitative geochemical sea surface temperature estimates from the Miocene mid-latitude North Pacific Ocean, and show that oceanic warmth persisted throughout the interval of low p(CO2) similar to 12-5 Myr ago. We also present new stable isotope measurements from the western equatorial Pacific that, in conjunction with previously published data(5-10), reveal a long-term trend of thermocline shoaling in the equatorial Pacific since similar to 13 Myr ago. We propose that a relatively deep global thermocline, reductions in low-latitude gradients in sea surface temperature, and cloud and water vapour feedbacks may help to explain the warmth of the late Miocene. Additional shoaling of the thermocline after 5 Myr ago probably explains the stronger coupling between p(CO2), sea surface temperatures and climate that is characteristic of the more recent Pliocene and Pleistocene epochs(11,12). |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
