Over-arching record: Water Circulation of Jervis Bay (Jervis Bay Baseline Studies Project 8)

The Jervis Bay Project was set up to undertake baseline studies of the key habitats and species in Jervis Bay on the New South Wales coast, and to develop a monitoring program to assist with long-term management of the bay. It was funded by the Department of Defence who at that time planned to relocate the fleet base of the Royal Australian Navy to Jervis Bay, and although this plan was abandoned mid-way through the study, the study was completed and the final report published in 1994.\n\nA series of 12 projects were proposed, with the 8th, 'Water Circulation of Jervis Bay' being undertaken by the Australian Defence Force Academy (ADFA). The initial aims of this project were to obtain current and wind observations from Jervis bay over a six week period in order to detail the wind driven circulation and provide a data set for comparison with the numerical modelling work being simultaneously undertaken. However, after this initial experiment it became clear that there were significant currents in the bay that are not simply related to direct wind forcing. Therefore, alternative mechanisms for driving the flow had to be investigated, through the measurement programs and data analysis, as well as through numerical modelling. The result was a series of approximately six separate experiments aiming to define the water circulation around the bay and through the bay entrance, to gain an understanding of the processes that drive the currents, and to investigate the influence of stratification on the nature of the currents.\n\nTwo experiments concentrated on the flow patterns within the bay. The first during the summer months when the bay is normally thermally stratified, from 6th December 1988 to 11th January 1989, and the second during winter when thermal stratification is generally much weaker, from 10th July to 30th October 1990. Between these two experiments, moorings were maintained in the bay entrance and on the shelf, from April 1989 to April 1990, in order to investigate exchange processes between the bay and shelf waters. Further, to better understand the partition of energy from the wind through the water column, two deployments were made with an Acoustic Doppler Current Profiler that gives current time series at 1m depth intervals over most of the water column. A summer deployment of the Doppler profiler was run from December 1990 to January 1991 and a winter deployment was run from July to September 1991. Approximately once per month throughout the three year period, 1989-1991, temperature-salinity surveys were conducted within the bay and out across the shelf to provide additional information on the water exchange and circulation.\n\nAvailable to download through this record is a pdf outlining the structure and hierarchy of metadata records relating to this project. Also available are the pdfs of the published working papers documenting the research. There are seven subsiduary records that directly relate to this over-arching record (see hierarchical tree): \n06bf0e30-2ae3-11dd-a735-00188b4c0af8 \n84d67460-2ae4-11dd-a735-00188b4c0af8\n5f4333e0-2ae5-11dd-a735-00188b4c0af8\nb146e140-2ae6-11dd-a735-00188b4c0af8\nc571bb80-2ae7-11dd-a735-00188b4c0af8\n13391430-2ae8-11dd-a735-00188b4c0af8\n629051e0-2b7b-11dd-a343-00188b4c0af8

杰维斯湾项目（Jervis Bay Project）旨在对新南威尔士州沿岸杰维斯湾的关键栖息地与物种开展本底调查，并制定监测方案以辅助该海湾的长期管理工作。本项目由澳大利亚国防部资助，当时国防部计划将澳大利亚皇家海军舰队基地迁至杰维斯湾；尽管该计划在研究进行中途被废止，但项目仍顺利完成，并于1994年发布了最终报告。

项目共规划12项子课题，其中第8项“杰维斯湾水体环流”由澳大利亚国防军学院（Australian Defence Force Academy, ADFA）承接。该项目的初始目标为：在六周周期内获取杰维斯湾的海流与风速观测数据，以详细阐明风驱环流机制，并提供数据集用于与同期开展的数值模拟工作进行比对。然而，在初始实验结束后，研究团队发现杰维斯湾内存在显著海流，其成因并非仅与直接风强迫相关。因此，需通过观测方案设计、数据分析以及数值模拟等手段，探究驱动海流的其他潜在机制。最终该项目开展了共计约6组独立实验，旨在明确海湾内外及湾口的水体环流特征，阐明海流的驱动过程，并探究层化效应对海流特性的影响。

其中两组实验聚焦于湾内流场特征：第一组实验于1988年12月6日至1989年1月11日开展，此时段海湾通常处于热层化状态；第二组实验于1990年7月10日至10月30日开展，对应热层化效应普遍较弱的冬季。在两组实验的间隔期（1989年4月至1990年4月），研究团队在湾口及陆架区域布设了锚系设备，以探究海湾与陆架水体间的交换过程。此外，为更好地解析风能在水柱中的传递分配过程，研究团队开展了两次声学多普勒流速剖面仪（Acoustic Doppler Current Profiler）布放作业，该设备可在大部分水柱深度范围内以1米间隔获取海流时间序列数据。夏季剖面仪布放作业时段为1990年12月至1991年1月，冬季布放作业则为1991年7月至9月。在1989年至1991年的三年周期内，研究团队每月开展一次湾内及跨陆架温盐调查，以补充获取水体交换与环流相关的额外数据。

本数据集记录中可下载一份PDF文档，用于说明与本项目相关的元数据记录的结构与层级体系；同时还可获取记录本研究成果的已发表工作论文PDF文件。本总记录下共包含7条直接关联的子记录（详见层级树）：
06bf0e30-2ae3-11dd-a735-00188b4c0af8
84d67460-2ae4-11dd-a735-00188b4c0af8
5f4333e0-2ae5-11dd-a735-00188b4c0af8
b146e140-2ae6-11dd-a735-00188b4c0af8
c571bb80-2ae7-11dd-a735-00188b4c0af8
13391430-2ae8-11dd-a735-00188b4c0af8
629051e0-2b7b-11dd-a343-00188b4c0af8