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DOI | 10.1029/2020GL091296 |
Evaluating the glacial‐deglacial carbon respiration and ventilation change hypothesis as a mechanism for changing atmospheric CO2 | |
Lowell D. Stott; Jun Shao; Jimin Yu; Kathleen M. Harazin | |
2020-12-28 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | The prevailing hypothesis to explain pCO2 rise at the last glacial termination calls upon enhanced ventilation of excess respired carbon that accumulated in the deep sea during the glacial. Recent studies argue lower [O2] in the glacial ocean is indicative of increased carbon respiration. The magnitude of [O2] depletion was 100‐140µmol/kg at the glacial maximum. Because respiration is coupled to δ13C of dissolved inorganic carbon (DIC), [O2] depletion of 100‐140µmol/kg from carbon respiration would lower deep water δ13CDIC by ∼ 1‰ relative to surface water. Prolonged sequestration of respired carbon would also lower the amount of 14C in the deep sea. We show that Pacific Deep Water δ13CDIC did not decrease relative to the surface ocean and Δ14C was only ∼50‰ lower during the late glacial. Model simulations of the hypothesized ventilation change during deglaciation lead to large increases in δ13CDIC, Δ14C and ε14C that are not recorded in observations. |
领域 | 气候变化 |
URL | 查看原文 |
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/311497 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Lowell D. Stott,Jun Shao,Jimin Yu,等. Evaluating the glacial‐deglacial carbon respiration and ventilation change hypothesis as a mechanism for changing atmospheric CO2[J]. Geophysical Research Letters,2020. |
APA | Lowell D. Stott,Jun Shao,Jimin Yu,&Kathleen M. Harazin.(2020).Evaluating the glacial‐deglacial carbon respiration and ventilation change hypothesis as a mechanism for changing atmospheric CO2.Geophysical Research Letters. |
MLA | Lowell D. Stott,et al."Evaluating the glacial‐deglacial carbon respiration and ventilation change hypothesis as a mechanism for changing atmospheric CO2".Geophysical Research Letters (2020). |
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