Monsoonal upwelling in the western Arabian Sea since the middle Miocene

Abstract

Research Article| July 01, 2017 Monsoonal upwelling in the western Arabian Sea since the middle Miocene Guangsheng Zhuang; Guangsheng Zhuang 1Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803, USA Search for other works by this author on: GSW Google Scholar Mark Pagani; Mark Pagani 2Department of Geology and Geophysics, Yale University, New Haven, Connecticut 06520, USA Search for other works by this author on: GSW Google Scholar Yi Ge Zhang Yi Ge Zhang 3Department of Oceanography, Texas A&M University, College Station, Texas 77843, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Guangsheng Zhuang 1Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803, USA Mark Pagani 2Department of Geology and Geophysics, Yale University, New Haven, Connecticut 06520, USA Yi Ge Zhang 3Department of Oceanography, Texas A&M University, College Station, Texas 77843, USA Publisher: Geological Society of America Received: 01 Feb 2017 Revision Received: 21 Mar 2017 Accepted: 21 Mar 2017 First Online: 28 Jun 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2017) 45 (7): 655–658. https://doi.org/10.1130/G39013.1 Article history Received: 01 Feb 2017 Revision Received: 21 Mar 2017 Accepted: 21 Mar 2017 First Online: 28 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Guangsheng Zhuang, Mark Pagani, Yi Ge Zhang; Monsoonal upwelling in the western Arabian Sea since the middle Miocene. Geology 2017;; 45 (7): 655–658. doi: https://doi.org/10.1130/G39013.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Asian monsoon has long been argued to be a product of the Himalaya–Tibetan Plateau, and simulation experiments have confirmed the key role of the Himalaya–Tibetan Plateau in transforming regional atmospheric and oceanic circulations. However, temporal constraints on the strengthening of the Asian monsoon inferred from foraminifer isotopic and faunal data and terrestrial climatic and ecological records are inconsistent with each other, which has obscured the tectonic-climatic linkage. In particular, discriminating the post-middle Miocene global cooling from the monsoon upwelling cooling is critical, but poorly understood due to the lack of adequate constraints for monsoonal upwelling. Here we present new middle to late Miocene biomarker-based reconstructions of sea-surface temperature (SST) for the western Arabian Sea. Our new SSTs capture a long-term ocean cooling since ca. 14.8 Ma and a major drop in SST in the period 11–10 Ma after which the SSTs reached similar values as the Holocene. The new SST record is consistent with planktonic foraminifer, siliceous biota, and geochemical tracer studies, suggestive of ocean cooling and high productivity associated with monsoonal upwelling. The 11–10 Ma ocean cooling is not clearly expressed in other tropical oceans, indicating that the ocean cooling in the western Arabian Sea is not a simple reflection of global cooling. We interpret the 11–10 Ma ocean cooling as representing the establishment of monsoonal upwelling in the western Arabian Sea, triggered by strong cyclonic activities as a result of the Neogene outward expansion of the Himalaya–Tibetan Plateau. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.