The Antarctic Coastal Current and its Influence on the Formation of Bottom Water in the Weddell Sea

模拟结果表明，南极沿岸流（AACC）在长时间尺度上影响着威德尔海的深层和底层水的性质。本项目的目的是确定AACC的海流、温度和盐度的平均场及其变率。将确定变化的原因及其对威德尔海深水和底层水的性质和形成的影响。为此目的，从过去的巡航与RV Polarstern和本项目的框架下进行的现有数据进行评估，以描述当前的时间和区域变化。时间变化的基础上，从停泊在格林威治子午线在AACC和重复CTD（电导率，温度，深度）部分的仪器的数据进行了研究。空间变异性由格林威治子午线上的CTD剖面、声学多普勒海流剖面仪、浮标和冰山标志数据来处理。将特别强调与海冰和冰山漂流有关的淡水输送。调查应显示在何种程度上所观察到的底层水特性的变化可以与ACCC的变化，如果他们是从东部平流的结果或起源于威德尔海。

Model results indicate that the Antarctic Coastal Current (AACC) influences the properties of the deep and bottom water properties in the Weddell Sea on long time scales. The aim of this project is to determine the mean fields of current, temperature and salinity of the AACC and their variability. The causes of the variations and their influence on the properties and formation of deep and bottom water in the Weddell Sea will be determined. For this purpose, available data from past cruises with RV Polarstern and those carried out under the framework of the present project are evaluated to describe the temporal and regional variations of the current. The temporal variations are studied on the basis of data from instruments moored on the Greenwich Meridian in the AACC and repeated CTD (conductivity, temperature, depth) sections. The spatial variability is addressed by CTD sections on the Greenwich Meridian, Acoustic Doppler Current Profiler (ADCP), floats and iceberg marker data. Special emphasis will be given to the freshwater transport related to sea ice and icebergs drifting in the AACC. The investigation should show to what extent the observed variations in the bottom water properties can be related to variations of the ACCC and if they are the results of advection from the east or originate within the Weddell Sea.