Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091899 |
Subsurface heat channel drove sea surface warming in the high-latitude North Atlantic during the Mid-Pleistocene Transition | |
M. Carolina A. Catunda; André; Bahr; Stefanie Kaboth-Bahr; Xu Zhang; Nicholas P. Foukal; Oliver Friedrich | |
2021-06-01 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | The Mid-Pleistocene Transition (MPT, 1200–600 ka) marks the rapid expansion of Northern Hemisphere continental ice sheets and stronger precession pacing of glacial/interglacial cyclicity. Here, we investigate the relationship between thermocline depth in the central North Atlantic, subsurface northward heat transport and the initiation of the 100-kyr cyclicity during the MPT. To reconstruct deep-thermocline temperatures, we generated a Mg/Ca-based temperature record of deep-dwelling (∼800 m) planktonic foraminifera from mid-latitude North Atlantic at Site U1313. This record shows phases of pronounced heat accumulation at subsurface levels during the mid-MPT glacials driven by increased outflow of the Mediterranean Sea. Concurrent warming of the subtropical thermocline and subpolar surface waters indicates enhanced (subsurface) inter-gyre transport of warm water to the subpolar North Atlantic, which provided moisture for ice-sheet growth. Precession-modulated variability in the northward transport of subtropical waters imprinted this orbital cyclicity into Northern Hemisphere ice-sheets after Marine Isotope Stage 24. |
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/329766 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | M. Carolina A. Catunda,André,Bahr,et al. Subsurface heat channel drove sea surface warming in the high-latitude North Atlantic during the Mid-Pleistocene Transition[J]. Geophysical Research Letters,2021. |
APA | M. Carolina A. Catunda.,André.,Bahr.,Stefanie Kaboth-Bahr.,Xu Zhang.,...&Oliver Friedrich.(2021).Subsurface heat channel drove sea surface warming in the high-latitude North Atlantic during the Mid-Pleistocene Transition.Geophysical Research Letters. |
MLA | M. Carolina A. Catunda,et al."Subsurface heat channel drove sea surface warming in the high-latitude North Atlantic during the Mid-Pleistocene Transition".Geophysical Research Letters (2021). |
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