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
Diverse glacial ventilation in deep Pacific: an integrated record from Mariana Trench and Magellan Seamounts over last 1.2 Myr
In: Global and Planetary Change. Elsevier: Amsterdam; New York; Oxford; Tokyo. ISSN 0921-8181; e-ISSN 1872-6364
|  |
| Abstract |
Antarctic bottom water production is one of the most important components in oceanic circulation, yet its long-term impact on Earth's climate remains poorly known. In this study, three sediment cores collected from the Mariana Trench and the Magellan Seamounts of the western Pacific are examined to investigate regional deep-sea ventilation over the past 1.2 Myr. The main results are as follows. 1) By integrating magnetostratigraphy, beryllium isotopes and element-based tuning, a geochronological framework is precisely established for the deep-sea sediments. 2) An Mn-based proxy for deep-sea ventilation is developed to provide an indication of paleoceanographic evolution in the western Pacific. 3) Diverse variations in regional ventilation associated with glacial-interglacial alternations are observed. Based on these results, a strong consistency in deep-sea ventilation between the North Atlantic and the western Pacific is found, indicating that deep-sea ventilation generally intensified during interglacial periods in the western Pacific. It is also highlighted the occurrence of enhanced deep-sea ventilation during several glacial periods in the study area, particularly at the end of the middle Pleistocene Transition and prior to the Mid-Brunhes Event. These findings suggest a reorganization of oceanic circulation in the deep Pacific around 0.6 Myr, which may have had implications for modulating atmospheric CO2 levels. Overall, the sedimentary records from the Mariana Trench and the Magellan Seamounts present great potentials for investigating the long-term influence of Antarctic bottom water production during the Pleistocene. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
