Document of bibliographic reference 368188

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Diverse glacial ventilation in deep Pacific: an integrated record from Mariana Trench and Magellan Seamounts over last 1.2 Myr

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.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:001098956100001

Bibliographic citation

Yi, L. (2023). Diverse glacial ventilation in deep Pacific: an integrated record from Mariana Trench and Magellan Seamounts over last 1.2 Myr. Global Planet. Change 230: 104279. https://dx.doi.org/10.1016/j.gloplacha.2023.104279

Topic

Marine

Is peer reviewed

true