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Millennial-scale ocean dynamics controlled export productivity in the subtropical North Pacific
Li, DW; Zheng, LW; Jaccard, SL; Fang, TH; Paytan, A; Zheng, XF; Chang, YP; Kao, SJ;
Source PublicationGEOLOGY
AbstractThe integrated effects of ocean-climate dynamics on export production in the North Pacific have remained elusive. We present a 91 k.y. export productivity (EP) record based on sedimentary reactive phosphorus from the western subtropical North Pacific. On a millennial time scale, EP decreased during Northern Hemisphere cold events when atmospheric dust loading was high, and increased during warm episodes. The inferred antiphase relation between dust and EP suggests that the supply of macronutrients to the sunlit surface ocean, modulated by the penetration depth of North Pacific Intermediate Water and not eolian Fe, exerted a major control on EP in the subtropical North Pacific. A compilation of global EP records suggests that eolian Fe most likely played a role in stimulating EP regionally only in the Subantarctic zone of the Southern Ocean. Over the past 91 k.y., during the cold-south-warm-north phase of the bipolar seesaw, the biological pump in both hemispheres was enhanced synchronously, yet by different drivers; atmospheric Fe input for the Subantarctic and subsurface macronutrient supply for the North Pacific, including the tropical and/or subtropical Pacific, and the Antarctic zone of the Southern Ocean.
Department[Li, Dawei; Zheng, Li-Wei; Kao, Shuh-Ji] Xiamen Univ, State Key Lab Marine Environm Sci, 422 Siming South Rd, Xiamen 361102, Peoples R China; [Jaccard, Samuel L.] Univ Bern, Inst Geol Sci, CH-3012 Bern, Switzerland; [Jaccard, Samuel L.] Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland; [Fang, Tien-Hsi] Natl Taiwan Ocean Univ, Dept Marine Environm Informat, 2 Beining Rd, Keelung 202, Taiwan; [Paytan, Adina] Univ Calif Santa Cruz, Earth & Planetary Sci, 1156 High St, Santa Cruz, CA 95064 USA; [Zheng, Xufeng] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China; [Chang, Yuan-Pin] Natl Sun Yat Sen Univ, Dept Oceanog, 70 Lien Hai Rd, Kaohsiung 806, Taiwan
Funding ProjectMSG
Document Type期刊论文
Recommended Citation
GB/T 7714
Li, DW,Zheng, LW,Jaccard, SL,et al. Millennial-scale ocean dynamics controlled export productivity in the subtropical North Pacific[J]. GEOLOGY,2017,45(7):651-654.
APA Li, DW.,Zheng, LW.,Jaccard, SL.,Fang, TH.,Paytan, A.,...& ocean dynamics controlled export productivity in the subtropical North Pacific.GEOLOGY,45(7),651-654.
MLA Li, DW,et al."Millennial-scale ocean dynamics controlled export productivity in the subtropical North Pacific".GEOLOGY 45.7(2017):651-654.
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