Deglacial Subantarctic CO2 outgassing driven by a weakened solubility pump
Type | Article | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Date | 2022-09 | ||||||||||||||||
Language | English | ||||||||||||||||
Author(s) | Dai Yuhao1, Yu Jimin2, Ren Haojia3, Ji Xuan1 | ||||||||||||||||
Affiliation(s) | 1 : Research School of Earth Sciences, The Australian National University, Canberra, ACT, Australia 2 : Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China 3 : Department of Geosciences, National Taiwan University, Taipei, Taiwan |
||||||||||||||||
Source | Nature Communications (2041-1723) (Springer Science and Business Media LLC), 2022-09 , Vol. 13 , N. 1 , P. 5193 (9p.) | ||||||||||||||||
DOI | 10.1038/s41467-022-32895-9 | ||||||||||||||||
WOS© Times Cited | 4 | ||||||||||||||||
Abstract | 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. |
||||||||||||||||
Full Text |
|