IMOS - Deep Water Moorings - Deep Water Arrays (DA) Sub-facility, Polynya array, Polynya2 Mooring Platform

IMOS - 深水系泊 - 深水阵列 (DA) 子设施、Polynya 阵列、Polynya2 系泊平台

• 批准号: global : acda12f8-b09f-476a-b58d-6c9144495019
• 负责人: Sloyan, Bernadette
• 金额: --
• 依托单位国家: 澳大利亚
• 财政年份: 2011
• 资助国家: 澳大利亚
• 起止时间: 2011-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://researchdata.edu.au/imos-deep-water-mooring-platform/696835
• 关键词: IMOS; Deep; Water; Moorings; Arrays

The Polynya2 (Mertz region) deepwater mooring was deployed on 2011-01-22 at (-66.20 S, 143.21 E) off the Adelie Land Coast in Antarctica, and was recovered in January 2015. 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), Seabird SBE37s (SM and SMP) and 16plus V2.<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.

Polynya 2（默茨地区）深水系泊于2011年1月22日在南极洲阿德利陆地海岸外（-66.20 S，143.21 E）部署，并于2015年1月回收。2014年2月，第二个阵列被部署在Totten Glacier附近的一个新位置，该位置于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）、Seabird SBE 37（SM和SMP）和16 plus V2。<br /> <br /> 该系泊系统将在海底和300米深度之间的每个系泊系统的四个深度收集一个时间序列的全深度流速剖面图以及离散温度和盐度测量值（系泊系统限于该深度，以避免与冰山接触）。<br /> <br /> 该Polynya系泊阵列将重新延续2008年开始的底层水输出时间序列，使用观测战略，并在2009年阵列恢复后根据需要进行修改。<br /> <br /> IMOS Polynya系泊阵列的目的是测量来自阿德利地海岸的密集南极底层水的输出。南极洲附近稠密海水的下沉提供了全球翻转环流的深层分支，这是一种强烈影响气候的洋流模式。最近的几项研究表明，澳大利亚南极盆地的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，以探测翻转环流的南大洋分支如何对高纬度气候强迫的变化作出反应。Totten地区新位置的目标是获得Totten冰川系统的“温暖”流入和（如果可能的话）流出的测量结果。碰巧的是，直接进入托滕河是不可能的，停泊处更靠近道尔顿冰山舌和莫斯科大学冰架，可能是托滕河流入故事的一部分。