Abrupt fluctuations in North Pacific Intermediate Water modulated changes in deglacial atmospheric CO2

Liu，Yanguang1,2; Qiu，Yue3; Li，Dongling3; Artemova，Antonina V.4; Zhang，Yuying1,5; Bosin，Aleksandr A.4; Gorbarenko，Sergey A.4; Liu，Qingsong6; Zhao，Debo7; Sha，Longbin3; Zhong，Yi6

2022-09-05

10.3389/fmars.2022.945110

Frontiers in Marine Science   Impact Factor & Quartile

2296-7745

As a major reservoir of heat and CO, the Pacific Ocean is an important component of the global climate system, but the nature of its circulation under different climatic conditions remains poorly understood. We present sedimentary records of surface water hydrography and nutrient dynamics from the subarctic Pacific Ocean, with the aim of investigating changes in sea-ice coverage, biological productivity, and sea surface temperature in the subarctic Northwest Pacific since 32 kyr. Our records indicate an enhanced North Pacific surface water stratification from the last glacial to Heinrich Stadial 1, which generally limited the siliceous productivity supply to the surface water. A productivity peak during the Bølling/Allerød warm interval was associated with an increase in the atmospheric pCO, and it was driven by the increased supply of nutrient- and CO-rich waters. This process can be attributed to the collapse of the North Pacific Intermediate Water formation at the onset of the Bølling/Allerød interstadial. Moreover, a northward shift of the westerly winds and the gyre boundary could have modulated the expansion of the subpolar gyre, driving changes in poleward heat transport, biogeochemistry, and the hydroclimate of the North Pacific. Our results are consistent with modern evidence for a northward shift of the westerlies in response to global warming, which will likely result in CO outgassing from the subarctic Pacific Ocean in the future.

biological productivity CO2 North Pacific Intermediate Water sea surface temperature subarctic Pacific Ocean

SCI

English

Corresponding

Marine Samp;T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[2022QNLM050203] ; Program of State Key Laboratory of Marine Geology, Tongji University[MGK202209] ; National Natural Science Foundation of China (NSFC)["U1606401","41876215","42176226"]

Environmental Sciences & Ecology ; Marine & Freshwater Biology

Environmental Sciences ; Marine & Freshwater Biology

WOS:000872908400001

FRONTIERS MEDIA SA

2-s2.0-85138283652

Scopus

1.Key Laboratory of Marine Sedimentology and Metallogeny,First Institute of Oceanography,Ministry of Natural Resources (MNR),Qingdao,China
2.Laboratory for Marine Geology,Pilot National Laboratory for Marine Science and Technology,Qingdao,China
3.Department of Geography and Spatial Information Techniques,Ningbo University,Ningbo,China
4.Laboratory of Paleoceanology,V.I. Il’ichev Pacific Oceanological Institute FEB RAS,Vladivostok,Russian Federation
5.College of Marine Geosciences,Key Laboratory of Submarine Geosciences and Prospecting Technology,Ocean University of China,Qingdao,China
6.Centre for Marine Magnetism (CM2),Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,China
7.Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao,China

Liu，Yanguang,Qiu，Yue,Li，Dongling,et al. Abrupt fluctuations in North Pacific Intermediate Water modulated changes in deglacial atmospheric CO2[J]. Frontiers in Marine Science,2022,9.

Liu，Yanguang.,Qiu，Yue.,Li，Dongling.,Artemova，Antonina V..,Zhang，Yuying.,...&Zhong，Yi.(2022).Abrupt fluctuations in North Pacific Intermediate Water modulated changes in deglacial atmospheric CO2.Frontiers in Marine Science,9.

Liu，Yanguang,et al."Abrupt fluctuations in North Pacific Intermediate Water modulated changes in deglacial atmospheric CO2".Frontiers in Marine Science 9(2022).