Enhanced direct ventilation in the subarctic Pacific Ocean during 3.5-2.73 Ma: New evidence of elemental results from ODP Site 882

Chen，Ting1,2; Liu，Qingsong2,3,4; Wang，Xiaodan5

2022-08-01

10.1016/j.gloplacha.2022.103867

GLOBAL AND PLANETARY CHANGE   Impact Factor & Quartile

0921-8181

1872-6364

Ocean ventilation change in the subarctic Pacific Ocean is critical for regulating nutrients, heating, and ocean-atmosphere CO2 exchange. Debate continues over whether direct ventilation in the subarctic Pacific Ocean has reached the deep/bottom oceans on different time scales over the last millions of years. Here, we studied the main and trace elements, including Si, Ca, Ba, Zn, Zr, and Rb, and stable nitrogen isotope signals between 5.5 and 2.5 Ma at Ocean Drilling Program (ODP) Site 882. Our results revealed that weakening of deep/ bottom water circulation after 3.5 Ma at ODP Site 882 was strongly linked to slowdown of deep/bottom water ventilation in the Atlantic and Southern Ocean. Element results indicated increase in oxygen content between-3.5 and 2.73 Ma, supporting the suggestion of North Pacific Deep Water formation. Surface vertical mixing strength varied over a long cycle of-400 kyr during the Early-to Mid-Pliocene in the northwest subarctic Pacific Ocean, which was linked to sea surface temperature gradient between low-and high-latitude regions caused by solar radiation differences regulated by changes in the Earth's orbital eccentricity.

North Pacific Deep Water Vertical mixing change Pliocene CO2 concentration North Atlantic Deep Water

SCI ; EI

English

Corresponding

National Natural Science Foundation of China (NNSFC)[41904069] ; Shenzhen Science and Technology Program[KQTD20170810111725321] ; Chongqing Normal University Doctors Iniation Funding Program[20xlb021] ; Chongqing Education Commission Science and Tech-nology program[KJQN202100544] ; Chongqing Science and Technology Program[cstc2017jcyjBX0024]

Physical Geography ; Geology

Geography, Physical ; Geosciences, Multidisciplinary

WOS:000828149500006

ELSEVIER

20222612268712

Carbon dioxide ; Mixing ; Oceanography ; Orbits ; Surface waters ; Ventilation

Surface Water:444.1 ; Oceanography, General:471.1 ; Ventilation:643.5 ; Chemical Operations:802.3 ; Inorganic Compounds:804.2

GEOSCIENCES

2-s2.0-85132503428

Web of Science

1.Chongqing Key Laboratory of Earth Surface Processes and Environmental Remote Sensing in Three Gorges Reservoir Area,Chongqing Normal University,Chongqing,401331,China
2.Centre for Marine Magnetism (CM),Department of Ocean Science and Engineering,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China
3.Laboratory for Marine Geology,Pilot National Laboratory for Marine Science and Technology,Qingdao,266061,China
4.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),China
5.Shanghai Natural History Museum,Shanghai,200041,China

Chen，Ting,Liu，Qingsong,Wang，Xiaodan. Enhanced direct ventilation in the subarctic Pacific Ocean during 3.5-2.73 Ma: New evidence of elemental results from ODP Site 882[J]. GLOBAL AND PLANETARY CHANGE,2022,215.

Chen，Ting,Liu，Qingsong,&Wang，Xiaodan.(2022).Enhanced direct ventilation in the subarctic Pacific Ocean during 3.5-2.73 Ma: New evidence of elemental results from ODP Site 882.GLOBAL AND PLANETARY CHANGE,215.

Chen，Ting,et al."Enhanced direct ventilation in the subarctic Pacific Ocean during 3.5-2.73 Ma: New evidence of elemental results from ODP Site 882".GLOBAL AND PLANETARY CHANGE 215(2022).