Sources and Variability of Weddell Sea Deep Water

南大洋是南极底层水（AABW）的来源。这些水团充满了全球大部分的海洋深渊，因此在经向翻转环流中起着至关重要的作用。作为全球环流的一个关键特征，大西洋、印度洋和北大西洋生物的生产率或主要特征的变化可能影响所有海洋的环流。威德尔海深层水（Weddell Sea Deep Water，WSDW）是威德尔海最重要的深水来源，它是直接沿着威德尔海西部斜坡或与威德尔海底层水（Weddell Sea Bottom Water，WSBW）混合而形成的。WSDW有三个主要来源区域：威德尔海西部和西南部的大陆架，以及威德尔海东部，循环水和来自南大洋印度区的水混合在一起。本项目的主要目标是确定WSDW的可变性驱动的不同来源，并确定AABW进一步下游的后果。 历史、最近和未来的系泊数据将与数值模拟一起使用，以实现目标。

The Southern Ocean is the source of the Antarctic Bottom Water (AABW). This water mass fills most of the global ocean abyss and thus plays a crucial role in the Meridional Overturning Circulation. As a key feature for the global circulation, changes in the production rates or in the main characteristics of the AABW may impact the circulation in all oceans. The Weddell Sea Deep Water (WSDW), which is formed directly along the slope of the western Weddell Sea or due to mixing with Weddell Sea Bottom Water (WSBW), escaping the Weddell Sea is the most important source of AABW. There are three main source regions of WSDW: the continental shelves of the western and southwestern Weddell Sea, and the eastern Weddell Sea, where recirculating water and water coming from the Indian Sector of the Southern Ocean mix. The main goal of this project is to identify the WSDW variability driven by the different sources and determine the consequences for AABW further downstream. Historical, recent, and future mooring data will be used together with and numerical modelling to fulfill the objectives.