NDLI: Paleoproductivity evolution in the West Philippine Sea during the last 700 ka

Content Provider	Springer Nature Link
Author	Tang, Zheng Li, Tiegang Chang, Fengming Nan, Qingyun Li, Qing
Copyright Year	2013
Abstract	In order to reconstruct the paleoproductivity evolution history of the West Philippine Sea during the last 700 ka, the vertical gradient of Δδ13C in dissolved inorganic carbon (Δδ13C between those of foraminifera Pulleniatina obliquiloculata and Cibicidoides wuellerstorfi) and planktonic foraminiferal assemblages were analysed in piston Core MD06-3047 retrieved from the Benham Rise (east of the Luzon Island). Paleoproductivity evolution in the West Philippine Sea during the last 700 ka is closely related to glacial-interglacial cycles and precession-controlled insolation. Controlling factors of paleoproductivity could have been both thermocline fluctuations related with ENSO-like processes and eolian input associated with East Asian winter monsoon, and the former could have been the primary factor. A higher productivity and a shallower thermocline coeval with the occurrence of low CO2 concentrations in the EPICA Dome C ice core might indicate that biological export production in the low-latitude could act as a significant sink in the global carbon cycle, and modify atmospheric CO2 concentrations. Spectral analysis further reveals that the paleoproductivity is mainly controlled by thermocline fluctuations subjected to ENSO processes responding to processional variability of insolation. High coherences in eccentricity, obliquity and precession periods further revealing the close link between thermocline fluctuations, paleoproductivity and atmospheric CO2 levels.
Starting Page	435
Ending Page	444
Page Count	10
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	31
Issue Number	2
e-ISSN	19935005
Language	English
Publisher	SP Science Press
Publisher Date	2013-03-07
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	paleoproductivity thermocline depth paleo-ENSO west Philippine Sea Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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