BROKE West Survey, Marine Science Cruise AU0603 - Oceanographic Field Measurements and Analysis

Oceanographic measurements around the 'BROKE-West' survey area along the Antarctic continental margin between 30 degrees and 80 degrees south were conducted aboard Aurora Australis cruise au0603 (voyage 3 2005/2006, 2nd January to 12th March 2006). A total of 120 CTD vertical profile stations were taken, most to within 15 m of the bottom. Over 2500 Niskin bottle water samples were collected for the measurement of salinity, dissolved oxygen, nutrients (phosphate, nitrate+nitrite, silicate and ammonia), 18O, dissolved inorganic carbon, alkalinity, particulate organic carbon/nitrogen/silicate, dimethyl sulphide, and biological parameters, using a 24 bottle rosette sampler. Full depth current profiles were collected by an LADCP attached to the CTD package, while near surface current profile data were collected by a ship mounted ADCP. Data from the array of ship's underway sensors are included in the data set.

This report describes the processing/calibration of the CTD and ADCP data, and details the data quality. An offset correction is derived for the underway sea surface temperature and salinity data, by comparison with near surface CTD data. LADCP data are not discussed in this report. Note that the data processor was not a cruise participant, thus this report does not describe all details of the shipboard field data collection or the problems encountered. CTD station positions are shown in Figures 1a and b, while CTD station information is summarised in Table 1. Niskin bottle sampling at each station is summarised in Table 2. (see word document detailed below for figures and tables)

Further information is available in a word document available as part of the download.

This work was completed as part of ASAC projects 2655 and 2679 (ASAC_2655, ASAC_2679).

本数据集采集了南纬30°至80°间南极大陆边缘"BROKE-West"调查区周边的海洋学观测数据，观测任务由南极光号（Aurora Australis）科考船执行航次au0603（2005/2006年度第3航次，2006年1月2日至3月12日）。
本次研究共布设120个CTD（温盐深剖面仪，Conductivity-Temperature-Depth Profiler）垂直剖面测站，多数测站的测量深度距海底仅15米以内。采用24瓶式采水器架（rosette sampler）采集了超过2500个尼斯金采水器（Niskin bottle）水样，用于测定盐度、溶解氧、营养盐（磷酸盐、硝酸盐+亚硝酸盐、硅酸盐与氨氮）、18O、溶解无机碳、碱度、颗粒有机碳/氮/硅酸盐、二甲基硫（dimethyl sulphide）以及各项生物学参数。依托搭载于CTD组合装置的下放式声学多普勒流速剖面仪（LADCP，Lowered Acoustic Doppler Current Profiler）获取全水深流速剖面数据，同时通过船载声学多普勒流速剖面仪（ADCP，Acoustic Doppler Current Profiler）采集近表层流速剖面数据。本数据集同时包含科考船走航传感器阵列的观测数据。

本报告详述了CTD与ADCP数据的处理/校准流程，并对数据质量进行了全面说明。通过与近表层CTD数据对比，对走航式海表温度与盐度数据进行了偏差校正。本报告未涉及LADCP相关数据的处理内容。需注意，本报告的数据处理人员并非本次航次的随船人员，因此未完全涵盖船载野外数据采集的全部细节以及航次中遇到的各类问题。CTD测站的位置详见图1a与图1b，CTD测站的相关信息汇总于表1，各测站的尼斯金采水器采样信息则汇总于表2（图表与表格详情请参见附件Word文档）。

更多相关信息可通过本次下载附带的Word文档获取。

本研究工作为ASAC项目2655与2679（ASAC_2655、ASAC_2679）的一部分。