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

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.

蒂姆尔北部深水锚系潜标于2011年6月14日首次布放于印度尼西亚贯穿流（Indonesian Throughflow）区域，坐标为南纬8.86°、东经127.20°，并于2014年4月退役。该锚系搭载的观测设备包括150kHz与75kHz声学多普勒流速剖面仪（ADCP）、Seabird SBE39型传感器、离散式海流计以及倒置回声测压仪（Pressure Inverted Echo Sounders, PIES）。该锚系可提供500米以浅的剖面流速数据，以及500米至1200米（控制槛水深）之间的定点流速数据；全水柱均采集温度与盐度数据。IMOS印度尼西亚贯穿流锚系阵列（Indoflow）的布设目标，在于可持续且直接地观测太平洋温跃层水与中层水从赤道西太平洋向南印度洋的跨洋泄漏过程。印度尼西亚海道是全球大洋翻转环流与气候系统的关键“咽喉要道”。流经该咽喉要道的海流流量与深度分布的年际至年代际变化，仍是悬而未决的棘手科学难题。具体而言，该海流的变化将反映太平洋与印度洋风场的长期变动，尤其是沃克环流（Walker Circulation）的任何变化——这一推论由增温温室气体情景下的耦合气候模式所预测。随着全球海洋持续变暖，与之相关的热通量变化同样可被观测到。Indoflow阵列的设计基于更为全面的INSTANT过程研究，被认定为监测印度尼西亚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，约占14 Sv总跨洋交换量中的11 Sv。Indoflow阵列与AIMS NAOS陆架观测线整合，使得跨洋交换量的估算可涵盖跨澳大利亚西北陆架的极暖水输运过程。帝汶海道内的所有锚系潜标均沿TOPEX/Jason卫星高度计任务的高精度条带航线布设。这些数据将有助于明确如何最优利用北部浅陆架区域的高度计数据，尤其在数据同化模型（data assimilating models）的应用场景中。