IMOS - Deep Water Moorings - Deep Water Arrays (DA) Sub-facility, Polynya array, Polynya3 Mooring Platform

Polynya3(默茨地区)深水系泊设施于2011年1月23日部署在南极洲阿德利陆地海岸外(-66.15 S，东经143.01度)，目前仍在原地，因积冰而无法进入。2014年2月，在Totten冰川附近的新位置部署了第二个阵列，该冰川已于2015年1月退役。<br/> <br/> 仪器包括75 kHz声学多普勒海流剖面仪(RDI LongRanger ADCP)和Seabird SBE37(SM、SMP和SMP-ODO)。<br/> <br/> 系泊设备将收集每个系泊设备在海底至300米深度(系泊设备限于此深度，以避免与冰山接触)四个深度处的全深度水流速度和离散温度和盐度测量的时间序列。<br/> <br/> 这个Polynya系泊阵列将使用观测战略重新延续2008年开始的底水出口时间序列，并在2009年恢复该阵列后根据需要进行修改。<br/> <br/> IMOS Polynya系泊阵列的目的是测量从阿德利陆地海岸输出的密集南极底层水。南极洲附近稠密水的下沉提供了全球颠覆环流的深分支，这种洋流模式强烈地影响着气候。最近的几项研究表明，澳大利亚南极盆地底层水的性质正在发生变化。监测底层水的温度、盐度和氧气将提供观测，以检测倾覆环流的南大洋分支如何对高纬度气候强迫的变化做出反应。新的托腾地区定位的目标是获得对托顿冰川系统的“暖”流入和(如果可能)流出的测量。碰巧的是，进入托滕河的权利是不可能的，停泊地点离道尔顿冰山之舌和莫斯科大学冰架更近，这可能是托滕河流入故事的一部分。

The Polynya3 (Mertz region) deepwater mooring was deployed on 2011-01-23 at (-66.15 S, 143.01 E) off the Adelie Land Coast in Antarctica, and currently remains in place, inaccessible due to pack ice. In February 2014 a second array was deployed in a new location near the Totten Glacier, which was decommissioned in January 2015.<br /> <br /> Instrumentation includes 75kHz Acoustic Doppler Current Profilers (RDI longranger ADCPs), and Seabird SBE37s (SM, SMP and SMP-ODO).<br /> <br /> The mooring will collect a time series of full-depth profiles of water velocity and discrete temperature and salinity measurement at four depth on each mooring, between the seafloor and 300m depth (the mooring are limited to this depth to avoid contact with icebergs).<br /> <br /> This Polynya mooring array will re-continue the time series of bottom water export begun in 2008, using observation strategy, modified as required following recovery of the array in 2009.<br /> <br /> The aim of the IMOS Polynya mooring array is to measure the export of dense Antarctic Bottom Water from the Adélie Land coast. Sinking of dense water near Antarctica supplies the deep branch of the global overturning circulation, a pattern of ocean currents that strongly influences climate. Several studies have recently shown that the properties of the bottom water in the Australian Antarctic Basin are changing. Monitoring the temperature, salinity and oxygen of bottom water will provide observations to detect how the Southern Ocean limb of the overturning circulation is responding to changes in high latitude climate forcing. The goal of the new Totten region location is to obtain measurements of "warm" inflow to, and (if possible) outflow from the Totten Glacier system. As it happened, access right to the Totten was not possible, and moorings were sited closer to the Dalton Iceberg Tongue and Moscow University Ice Shelf, possibly part of the Totten inflow story.