NDLI: A broad deglacial δ$^{13}$C minimum event in planktonic foraminiferal records in the Okinawa Trough

Content Provider	Springer Nature Link
Author	Tiegang, Li Zhenxia, Liu Hall, M. A. Saito, Y. Berne, S. Shuxi, Cang Zhenbo, Cheng
Copyright Year	2002
Abstract	The equatorial Pacific upwelling zone has been suspected of playing an important role in the global atmospheric CO$_{2}$ changes associated with glacial-interglacial cycles. In order to assess the influencing scope of the surface water deglacial δ$^{13}$C minimum in the tropical low-latitude Pacific, the core DGKS9603, collected from the middle Okinawa Trough, was examined for δ$^{13}$C records of planktonic foraminifera N. dutertrei and G. ruber. The planktonic foraminiferal δ$^{13}$C records show a clear decreasing event from 20 to 6 cal. kaBP., which is characterized by long duration of about 14 ka and amplitude shift of 0.4 × 10$^{−3}$. Its minimum value occurred at 15.7 cal kaBP. The event shows fairly synchrony with the surface water deglacial δ$^{13}$C minimum identified in the tropical Pacific and its marginal seas. Because there is no evidence in planktonic foraminiferal fauna and δ$^{18}$O records for upwelling and river runoff enhancement, the broad deglacial δ$^{13}$C minimum event in planktonic foraminiferal records revealed in core DGKS9603 might have been the direct influencing result of the deglacial surface water of the tropical Pacific. The identification for the event in the Okinawa Trough provides new evidence that the water evolution in the tropical low-latitude Pacific plays a key role in large regional, even global carbon cycle.
Starting Page	599
Ending Page	603
Page Count	5
File Format	PDF
ISSN	10016538
Journal	Chinese Science Bulletin
Volume Number	47
Issue Number	7
e-ISSN	18619541
Language	English
Publisher	Science in China Press
Publisher Date	2013-08-30
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	planktonic foraminiferal δ$^{13}$C minimum event Okinawa Trough last deglaciation Science Life Sciences Physics Chemistry/Food Science Earth Sciences Engineering
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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