Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-018-0108-6 |
Deglacial upwelling, productivity and CO2 outgassing in the North Pacific Ocean | |
Gray, William R.1,2; Rae, James W. B.2; Wills, Robert C. J.3; Shevenell, Amelia E.4,5; Taylor, Ben2; Burke, Andrea2; Foster, Gavin L.6; Lear, Caroline H.7 | |
2018-05-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:5页码:340-+ |
文章类型 | Article |
语种 | 英语 |
国家 | England; Scotland; USA; Wales |
英文摘要 | The interplay between ocean circulation and biological productivity affects atmospheric CO2 levels and marine oxygen concentrations. During the warming of the last deglaciation, the North Pacific experienced a peak in productivity and widespread hypoxia, with changes in circulation, iron supply and light limitation all proposed as potential drivers. Here we use the boronisotope composition of planktic foraminifera from a sediment core in the western North Pacific to reconstruct pH and dissolved CO2 concentrations from 24,000 to 8,000 years ago. We find that the productivity peak during the Bolling-Allerod warm interval, 14,700 to 12,900 years ago, was associated with a decrease in near-surface pH and an increase in pCO(2), and must therefore have been driven by increased supply of nutrient- and CO2-rich waters. In a climate model ensemble (PMIP3), the presence of large ice sheets over North America results in high rates of wind-driven upwelling within the subpolar North Pacific. We suggest that this process, combined with collapse of North Pacific Intermediate Water formation at the onset of the Bolling-Allerod, led to high rates of upwelling of water rich in nutrients and CO2, and supported the peak in productivity. The respiration of this organic matter, along with poor ventilation, probably caused the regional hypoxia. We suggest that CO2 outgassing from the North Pacific helped to maintain high atmospheric CO2 concentrations during the Bolling-Allerod and contributed to the deglacial CO2 rise. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000431168900016 |
WOS关键词 | LAST GLACIAL MAXIMUM ; DEEP-WATER FORMATION ; BORON ISOTOPE ; DISSOCIATION-CONSTANTS ; GLOBIGERINOIDES-RUBER ; CARBONATE SYSTEM ; ATMOSPHERIC CO2 ; SEA ; MG/CA ; TEMPERATURE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34796 |
专题 | 地球科学 气候变化 |
作者单位 | 1.UCL, Dept Geog, London, England; 2.Univ St Andrews, Sch Earth & Environm Sci, St Andrews, Fife, Scotland; 3.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 4.UCL, Dept Earth Sci, London, England; 5.Univ S Florida, Coll Marine Sci, St Petersburg, FL USA; 6.Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Southampton, Hants, England; 7.Cardiff Univ, Sch Earth & Ocean Sci, Cardiff, S Glam, Wales |
推荐引用方式 GB/T 7714 | Gray, William R.,Rae, James W. B.,Wills, Robert C. J.,et al. Deglacial upwelling, productivity and CO2 outgassing in the North Pacific Ocean[J]. NATURE GEOSCIENCE,2018,11(5):340-+. |
APA | Gray, William R..,Rae, James W. B..,Wills, Robert C. J..,Shevenell, Amelia E..,Taylor, Ben.,...&Lear, Caroline H..(2018).Deglacial upwelling, productivity and CO2 outgassing in the North Pacific Ocean.NATURE GEOSCIENCE,11(5),340-+. |
MLA | Gray, William R.,et al."Deglacial upwelling, productivity and CO2 outgassing in the North Pacific Ocean".NATURE GEOSCIENCE 11.5(2018):340-+. |
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