FN Archimer Export Format
PT J
TI Deep-water circulation intensity and stratification in the South China Sea since the last glaciation
BT 
AF Zhao, Yulong
   Wang, Yuwei
   Liu, Zhifei
   Li, Xiajing
   Yang, Wenguang
AS 1:1;2:1;3:1;4:1;5:2;
FF 1:;2:;3:;4:;5:;
C1 State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
   Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
C2 UNIV TONGJI, CHINA
   UNIV CHENGDU, CHINA
IF 2.9
TC 5
UR https://archimer.ifremer.fr/doc/00820/93189/99788.pdf
LA English
DT Article
CR MD 147 / MARCO-POLO1-IMAGESXII
BO Marion Dufresne
DE ;Paleocurrent intensity;Sortable silt;Deep circulation;Stratification;Glacial North Pacific Intermediate Water;South China Sea
AB Deep-water circulation in the South China Sea is closely linked to deep hydrography of the North Pacific via water exchange at the Luzon Strait. In this study, temporal changes of the paleocurrent intensity in the South China Sea are established using the detrital sortable silt proxy to reconstruct the evolution of deep hydrography of the subarctic Pacific since the last deglaciation. The results show that deep (>1500 m) currents in the South China Sea were relatively vigorous during the last glacial period, and relatively weak during the Holocene. A gradual decrease of current speed during the last deglaciation was observed at both ~1650 m and ~ 2000 m water depths. Furthermore, the current-intensity decline started earlier in relatively shallow portion (~1650 m) than in deep portion (~2000 m). This disparity is interpreted to be associated with the gradual deepening of the glacial North Pacific Intermediate Water, which reduced the pressure gradients between the Pacific and the South China Sea at the depth levels it affected. Such processes also greatly altered the stratification in the South China Sea: a strong stratification existed prior to the Heinrich Stadial 1, but it vanished owing to the enhanced vertical mixing brought by downward penetration of the glacial North Pacific Intermediate Water. Our study provides new insights into the evolution of deep hydrography in the subarctic Pacific, and the processes how such changes affect the subtropical Pacific under glacial boundary condition. 
PY 2023
PD MAR
SO Marine Geology
SN 0025-3227
PU Elsevier BV
VL 457
UT 000964519600001
DI 10.1016/j.margeo.2023.107004
ID 93189
ER

EF