Late Pleistocene zinc isotopic indices of paleoproductivity variations in the tropical West Pacific
文献类型：期刊论文
| 作者 | Pei, Wenlong12; Wang, Jiayue12; Wang, Xinling12; Du, Liang11; Wang, Yipeng12; Fan, Yujin12; Zhang, Rui1,10,12,13; Li, Tiegang7,8,9; Russell, James10; Zhang, Fan6 |
| 刊名 | CATENA
 |
| 出版日期 | 2023-07-01 |
| 卷号 | 228页码:10 |
| 关键词 | Paleoproductivity Zn isotopes Carbonates ENSO Nutricline |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2023.107128 |
| 英文摘要 | The tropical western Pacific (TWP) plays a significant role in modulating the global climate, with solar radiation, sea surface temperature, and monsoon circulation. Marine prime productivity fluctuations in the TWP can change the global carbon cycle. However, isotopic geochemical evidence reconstructing the changes of pro-ductivity in the western Pacific warm pool (WPWP) is currently lacking. The forcing mechanism that changes productivity in the WPWP remains uncertain. Here, we used the Zinc isotope (delta 66Zn) composition in sediment carbonate with Ba/Ti ratios and differences in foraminiferal carbon isotopes between the surface, and thermo-cline obtained from the Ocean Drilling Program (ODP) Site 807A to reconstruct paleoproductivity and nutricline depth over the last 550 ka period. The Zn isotopic composition signal exhibited a generally fluctuating increase, which is similar in a trend found in the Ba/Ti records. In a periodogram of marine productivity tracing, delta 66Zn and Ba/Ti showed periodicities of 33 and 31 ka, respectively, suggesting the influence of long-term El Nin similar to o Southern Oscillation (ENSO)-like forcing. Good coherence between the paleoproductivity records and the nutricline suggests that nutricline changes could be the primary controlling factor in changes in paleoproductivity. During El Nin similar to o-like conditions, the shallow nutricline in the WPWP can result in high prime productivity accompanied by high delta 66Zn values. In addition, the higher productivity and shallower nutricline coeval with the occurrence of low CO2 concentrations in the Antarctic ice core might indicate that biological export production at low latitudes could act as a significant sink in the global carbon cycle and modify atmospheric CO2 concentrations. Our new datasets of sedimentary carbonates in the tropical ocean can provide better insight and constrain on marine Zn biogeochemical cycle and a strong potential tracer in paleoproductivity. |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000990288000001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74197]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Zhang, Rui; Li, Tiegang |
| 作者单位 | 1.Jiangsu Ocean Univ, Coinnovat Ctr Jiangsu Marine Bioind Technol, Lianyungang 222005, Jiangsu, Peoples R China 2.China Univ Geosci, Sch Ocean Sci, Beijing 100083, Peoples R China 3.Shenzhen Polytech, Shenzhen 518055, Guangdong, Peoples R China 4.Soochow Univ, Med Coll, Sch Radiat Med & Protect, Suzhou 215123, Jiangsu, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 6.Jiangsu Ocean Univ, Dept Chem Engn, Lianyungang 222005, Jiangsu, Peoples R China 7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 8.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 9.Minist Nat Resources, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China 10.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA |
| 推荐引用方式 GB/T 7714 | Pei, Wenlong,Wang, Jiayue,Wang, Xinling,et al. Late Pleistocene zinc isotopic indices of paleoproductivity variations in the tropical West Pacific[J]. CATENA,2023,228:10. |
| APA | Pei, Wenlong.,Wang, Jiayue.,Wang, Xinling.,Du, Liang.,Wang, Yipeng.,...&Han, Qi.(2023).Late Pleistocene zinc isotopic indices of paleoproductivity variations in the tropical West Pacific.CATENA,228,10. |
| MLA | Pei, Wenlong,et al."Late Pleistocene zinc isotopic indices of paleoproductivity variations in the tropical West Pacific".CATENA 228(2023):10. |
入库方式： OAI收割
来源：广州地球化学研究所
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