What controls the warming of the Antarctic Bottom Water supply to the Atlantic Ocean

在过去的30年里，南极底层水（AABW）填充了大部分海洋深渊，在世界大部分海洋，特别是大西洋盆地，表现出显着的变暖和体积收缩。虽然这些变化的原因尚不清楚，但现有的证据表明，在大西洋，AABW的变暖和收缩可能是由于威德尔海上风的强度和结构的变化造成的，那里产生了大量的AABW。AABW是世界水团的聚集地，对全球气候特别重要，因为它将热量和碳吸入海洋深处。本项目将通过以下方式测试和量化这一假设：（i）确定从威德尔海进入大西洋的AABW的流动和性质如何响应风强迫，以及（ii）评估风强迫扰动与AABW变化之间的动力过程。该项目将使人们彻底了解南极风的变化如何影响全球海洋深渊最深层的热含量。

During the last three decades, the Antarctic Bottom Water (AABW) that fills the bulk of the ocean abyss has exhibited a striking warming and contraction in volume over much of the world ocean, particularly in the Atlantic basin. While the causes of these changes are unknown, available evidence suggests that, in the Atlantic Ocean, the warming and contraction of AABW may be caused by changes in the strength and configuration of winds over the Weddell Sea, where much AABW is produced. AABW is the densest of the world's water masses, and is particularly important to global climate because of its role in drawing down heat and carbon into the depths of the ocean.This project will test and quantify this hypothesis by (i) determining how the flow and properties of the AABW entering the Atlantic Ocean from the Weddell Sea respond to wind forcing, and (ii) assessing the dynamical processes connecting wind forcing perturbations to changes in AABW. The project will generate a thorough understanding of the ways in which changes in Antarctic winds may shape the heat content of the deepest layers of the global ocean abyss.