https://scholars.lib.ntu.edu.tw/handle/123456789/542470
標題: | More efficient North Atlantic carbon pump during the Last Glacial Maximum | 作者: | Yu, J. Menviel, L. Jin, Z.D. Thornalley, D.J.R. Foster, G.L. Rohling, E.J. McCave, I.N. McManus, J.F. Dai, Y. Ren, H. He, F. Zhang, F. Chen, P.J. HAO-JIA REN |
公開日期: | 2019 | 卷: | 10 | 期: | 1 | 起(迄)頁: | - | 來源出版物: | Nature Communications | 摘要: | During the Last Glacial Maximum (LGM; ~20,000 years ago), the global ocean sequestered a large amount of carbon lost from the atmosphere and terrestrial biosphere. Suppressed CO2 outgassing from the Southern Ocean is the prevailing explanation for this carbon sequestration. By contrast, the North Atlantic Ocean—a major conduit for atmospheric CO2 transport to the ocean interior via the overturning circulation—has received much less attention. Here we demonstrate that North Atlantic carbon pump efficiency during the LGM was almost doubled relative to the Holocene. This is based on a novel proxy approach to estimate air–sea CO2 exchange signals using combined carbonate ion and nutrient reconstructions for multiple sediment cores from the North Atlantic. Our data indicate that in tandem with Southern Ocean processes, enhanced North Atlantic CO2 absorption contributed to lowering ice-age atmospheric CO2. © 2019, The Author(s). |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85065790639&partnerID=40&md5=182870f19967702c5c24faeda68cae7a https://scholars.lib.ntu.edu.tw/handle/123456789/542470 |
DOI: | 10.1038/s41467-019-10028-z | SDG/關鍵字: | carbon; dissolved organic matter; limestone; air-ice interaction; biological pump; carbon dioxide; carbon sequestration; global ocean; Holocene; Last Glacial Maximum; overturn; sediment core; alkalinity; analytic method; aquatic environment; Article; Atlantic Ocean; atmospheric deposition; benthos; biosphere; carbon dioxide tension; cell invasion; glacier; Gulf stream; Holocene; ice age; last glacial maximum; limit of quantitation; marine environment; mathematical model; North Atlantic deep water; oxygen consumption; photosynthesis; proton transport; sensitivity and specificity; structural equation modeling; temperature; Atlantic Ocean; Atlantic Ocean (North); Southern Ocean |
顯示於: | 地質科學系 |
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