Is there a climatic tipping point for Antarctic Bottom Water formation?

南极底层水在全球海洋环流和气候中起着重要作用，但其形成对气候变化也高度敏感。该项目将分析2022年初在南极洲东部达恩利角的一次航行中采集的新的海底、岩心和水样。这一新数据将与改进的高分辨率区域海洋模式结合使用，以了解不同气候状态(比现在更暖和更冷)下的现代和过去南极底水形成，以确定南极底水形成是否存在气候转折点。预期的好处包括更好地了解这片重要水域未来的气候变化。

Antarctic Bottom Water plays an important role in global ocean circulation and climate and yet its formation is also highly sensitive to climate change. This project will analyse new seafloor, core and water samples from the understudied Cape Darnley, East Antarctica, collected on a voyage in early 2022. This new data will be used in combination with an improved high resolution regional ocean model, to understand modern and past Antarctic Bottom Water formation under different climate states (warmer and colder than present), to determine if there are climate tipping points for the shut down of Antarctic Bottom Water formation. The anticipated benefits include a better understanding of future climate change on this important water mass.