https://scholars.lib.ntu.edu.tw/handle/123456789/628802
標題: | Deglacial Subantarctic CO2 outgassing driven by a weakened solubility pump | 作者: | Dai, Yuhao Yu, Jimin HAO-JIA REN Ji, Xuan |
關鍵字: | SOUTHERN-OCEAN; BORON ISOTOPE; CARBON-CYCLE; DEEP-SEA; DOME-C; NITRATE; TEMPERATURE; PACIFIC; VARIABILITY; REDUCTION | 公開日期: | 十二月-2022 | 出版社: | NATURE PORTFOLIO | 卷: | 13 | 期: | 1 | 來源出版物: | Nature communications | 摘要: | The Subantarctic Southern Ocean has long been thought to be an important contributor to increases in atmospheric carbon dioxide partial pressure (pCO2) during glacial-interglacial transitions. Extensive studies suggest that a weakened biological pump, a process associated with nutrient utilization efficiency, drove up surface-water pCO2 in this region during deglaciations. By contrast, regional influences of the solubility pump, a process mainly linked to temperature variations, have been largely overlooked. Here, we evaluate relative roles of the biological and solubility pumps in determining surface-water pCO2 variabilities in the Subantarctic Southern Ocean during the last deglaciation, based on paired reconstructions of surface-water pCO2, temperature, and nutrient utilization efficiency. We show that compared to the biological pump, the solubility pump imposed a strong impact on deglacial Subantarctic surface-water pCO2 variabilities. Our findings therefore reveal a previously underappreciated role of the solubility pump in modulating deglacial Subantarctic CO2 release and possibly past atmospheric pCO2 fluctuations. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/628802 | ISSN: | 2041-1723 | DOI: | 10.1038/s41467-022-32895-9 |
顯示於: | 地質科學系 |
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