High- and low-latitude forcing on the subarctic Pacific environment and productivity over the past 230 kyr
- 1. Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources (MNR), Qingdao 266061, China
- 2. Centre for Marine Magnetism (CM2), Department of Ocean Science and Engineering, Southern Unversity of Science and Technology, Shenzhen 518055, China
- 3. Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Am Handelshafen 12, 27570 Bremerhaven, Germany
- 4. Department of Earth Sciences, University of Hong Kong, Hong Kong, China
- 5. GEOTOP, Université du Québec à Montréal, C.P. 8888, Montréal, QC H3C 3P8, Canada
- 6. V.I.Il'ichev Pacific Oceanological Institute, Far East Branch of Russian Academy of Science, Vladivostok 690041, Russia
- 7. V.I.Il'ichev Pacific Oceanological Institute, Far East Branch of the Russian Academy of Sciences, Vladivostok 690041, Russia
- 8. Centre for Marine Magnetism (CM2), Department of Ocean Science and Engineering, Southern University of Science and Technology
Description
The subarctic Pacific Ocean, which is linked to both polar and tropical climates, is an area of high marine productivity and sensitive to ocean-atmosphere CO2 flux, however, the mechanisms underlying the drivers of its productivity dynamics or patterns remain elusive. Using biogenic barium, opal, and terrgenous input in sediment core since the past 230 kyr, we present a continuous high resolution nutrient availability dynamic for the subarctic Pacific Ocean and assess possible changes to sea ice and glacial North Pacific Intermediate Water on nutrient upwelling in the region. We suggest that export production in this region is controlled by the freshwater discharge associated with moisture and heat from low-latitude and the iceberg discharge from Kamchatka glaciations under a weak Aleutian Low. These findings indicate that both high- and low-latitude climate systems forced the evolution of marine environment and primary productivity in the high-latitude North Pacific.
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