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IMOS - Deep Water Moorings - Deep Water Arrays (DA) Sub-facility, Indonesian Throughflow array, Timor North (ITFTIN) Mooring Platform

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Research Data Australia2024-12-14 收录
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https://researchdata.edu.au/imos-deep-water-mooring-platform/692381
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The Timor North deep water mooring was first deployed on 2011-06-14 at (8.86 S, 127.20 E) in the Indonesian Throughflow, , and was decommissioned in April 2014. Instrumentation includes 150 kHz and 75kHz ADCPs, Seabird SBE39s, discrete current meters and Pressure Inverted Echo Sounders (PIES). The mooring provides profile velocity data above 500m and point source velocity between 500m and 1200m (depth of controlling sill). Temperature and salinity data are collected for the entire water column. The aim of IMOS Indonsian Throughflow moorings (Indoflow) is to sustainably and directly measure the leakage of Pacific thermocline and intermediate waters from the western equatorial Pacific into the South Indian Ocean. The Indonesian Passages represent an important 'choke point' of the global ocean overturning circulation and the climate system. The interannual to decadal variability of the size and depth distribution of the flow through this choke point remains a troublesome unknown. In particular, changes in this flow will reflect long term changes in the Pacific and Indian Ocean wind fields, particularly any change in the Walker Circulation, as predicted by coupled climate models forced by increasing Greenhouse Gas scenarios. Changes in the associated heat flux are also anticipated at the global oceans warm. The Indoflow array design is based on the more comprehensive INSTANT process study and is deemed the minimal required mooring array to monitor the Indonesian Throughflow. The Ombai Strait and Timor Passage Throughflow components comprise about 11Sv of the 14 Sv total interbasin exchange. The Indoflow array integrates with the AIMS NAOS shelf line, allowing estimates of the interbasin exchange to include the transport of very warm waters across the Australian North West Shelf. All moorings in the Timor Passage are located along a high precision swath line of the TOPEX/Jason satellite altimeter missions. These data will shed light on how best to exploit altimetric data over our shallow northern shelves, especially in data assimilating models.

帝汶北深水锚系(Timor North deep water mooring)于2011年6月14日首次布设于印尼贯穿流(Indonesian Throughflow)海域的(8.86°S, 127.20°E)位置,并于2014年4月退役。 该锚系搭载的观测设备包括150千赫兹与75千赫兹的声学多普勒流速剖面仪(Acoustic Doppler Current Profilers,ADCP)、Seabird SBE39型传感器、离散式海流计以及压力倒置回声测深仪(Pressure Inverted Echo Sounders,PIES)。 该锚系可获取500米以浅的剖面流速数据,以及500米至1200米(控制海槛深度)的定点流速数据;全水柱均可采集温度与盐度数据。 IMOS印尼贯穿流锚系阵列(Indonesian Throughflow moorings,简称Indoflow)的研究目标是可持续地直接观测太平洋温跃层与中层水从赤道西太平洋向南印度洋的泄漏输送过程。印尼海道是全球大洋翻转环流与气候系统的关键“咽喉通道”。该咽喉通道内流场的规模与深度分布的年际至年代际变化,至今仍是尚未解决的科学难题。具体而言,该流场的变化将反映太平洋与印度洋风场的长期演变,尤其是沃克环流(Walker Circulation)的变化——这一结论与温室气体浓度升高情景下的耦合气候模式预测结果一致。伴随全球海洋增温,相关热通量的变化同样值得关注。 Indoflow阵列的设计基于更为全面的INSTANT过程研究,被认为是监测印尼贯穿流所需的最小规模锚系阵列。翁拜海峡与帝汶海道的贯穿流分量,在14斯维德里德(Sverdrup,Sv,海洋流量单位,1 Sv=10^6 m³/s)的总跨洋盆交换中占比约11斯维德里德。Indoflow阵列与AIMS NAOS陆架观测线相整合,可使跨洋盆交换的估算范围涵盖澳大利亚西北陆架的极暖水输送过程。 帝汶海道内的所有锚系均沿TOPEX/Jason卫星高度计任务的高精度条带航线布设。这些数据将有助于阐明如何最优地利用澳大利亚北部浅陆架区域的高度计数据,尤其是在数据同化模式的应用场景中。
提供机构:
Australian Ocean Data Network
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