Liu Zhengyu
Department of Geography, The Ohio State University,154 North Oval Mall, Columbus OH 43210, USA.
Philos Trans A Math Phys Eng Sci. 2023 Dec 11;381(2262):20220190. doi: 10.1098/rsta.2022.0190. Epub 2023 Oct 23.
The Atlantic Meridional Overturning Circulation (AMOC) and the associated water masses have changed dramatically during the glacial-interglacial cycle. Here, I review some recent progress in the modelling of the AMOC and water masses since the Last Glacial Maximum and discuss the relevance of these past AMOC studies to the present and future AMOC study. Recent studies suggested that Atlantic water masses were constrained by carbon isotopes (δC) and neodymium isotopes (ε), while the strength of the AMOC better was constrained by protactinium/thorium ratio (Pa/Th) and the spatial gradient of calcite oxygen isotopes (δO). In spite of the shallower AMOC at the glacial period, its intensity did not differ substantially from the present because of the cancellation of opposite responses to the rising CO and the retreating ice sheet. This article is part of a discussion meeting issue 'Atlantic overturning: new observations and challenges'.
在冰期 - 间冰期循环期间，大西洋经向翻转环流（AMOC）及相关水体发生了巨大变化。在此，我回顾了自末次盛冰期以来AMOC和水体模拟方面的一些最新进展，并讨论了这些过去的AMOC研究与当前及未来AMOC研究的相关性。近期研究表明，大西洋水体受碳同位素（δC）和钕同位素（ε）的限制，而AMOC的强度则更好地受镤/钍比值（Pa/Th）和方解石氧同位素的空间梯度（δO）的限制。尽管在冰期AMOC较浅，但其强度与当前相比并无显著差异，这是由于对上升的二氧化碳和退缩的冰盖的相反响应相互抵消。本文是“大西洋翻转：新观测与挑战”讨论会议题的一部分。
