Mertz Polynya Experiment, Aurora Australis science cruises au9807 and au9901, and Tangaroa science cruise ta0051 - ship-based CTD, ADCP, LADCP and mooring data

Oceanographic measurements were conducted in the vicinity of the Mertz Polynya, encompassing 2 consecutive seasonal cycles from 1998 to 2000. In the southern winter of 1999, a total of 92 CTD/LADCP vertical profile stations were taken, most to within 20 m of the bottom, with 3 laps completed around the boundary of a box adjacent to the Mertz Glacier. Over 700 Niskin bottle water samples were collected for the measurement of salinity, dissolved oxygen, nutrients, oxygen 18, dimethyl sulphide, and biological parameters, using a 12 bottle rosette sampler mounted on a 24 bottle frame. Additional CTD vertical profiles were taken in April 1998, July 1998 and February 2000. Near surface current data were collected on all cruises using ship mounted ADCP. Two mooring arrays comprising thermosalinographs, current meters and upward looking sonars were deployed in the region of the Polynya. The first array of 7 moorings was deployed in April 1998. The second array of 4 moorings was deployed in the winter of 1999. All 11 Polynya moorings were recovered in February 2000. A summary of all data and data quality is presented in the data report.This work was completed as part of ASAC projects 2223 and 189.

本数据集针对默茨冰间湖（Mertz Polynya）周边海域开展了系统性海洋学观测，观测覆盖1998至2000年的两个连续季节性循环周期。1999年南大洋冬季期间，共计完成92个CTD（温盐深剖面仪，Conductivity-Temperature-Depth）/LADCP（下放式声学多普勒流速剖面仪，Lowered Acoustic Doppler Current Profiler）垂直剖面测站，多数测站的观测深度距海底不足20米，并环绕毗邻默茨冰川的矩形区域边界完成了3圈巡航测线。研究采用安装于24瓶采水器支架上的12瓶式采水笼，通过尼斯金采水器（Niskin bottle）采集了700余份水样，用于测定盐度、溶解氧、营养盐、氧-18、二甲基硫以及各类生物学参数。此外，分别于1998年4月、1998年7月及2000年2月开展了补充CTD垂直剖面观测。所有航次均采用船载声学多普勒流速剖面仪（ADCP，Acoustic Doppler Current Profiler）采集近表层海流数据。研究团队在冰间湖海域布设了两套锚系观测阵列，阵列包含温盐记录仪、海流计与向上声呐：第一套含7个锚系站点，于1998年4月布设；第二套含4个锚系站点，于1999年冬季布设。全部11个冰间湖锚系站点均于2000年2月完成回收。本数据集的全部数据与数据质量总结详见配套数据报告。本研究作为ASAC项目2223与189的子任务完成。