Parent record: Vertical coherence of currents in Jervis Bay: Winter deployment of an Acoustic Doppler Current Profiler (ADCP)

本记录描述了由国防部、CSIRO和澳大利亚国防军学院（ADFA）进行的“杰维斯湾基线研究”项目的组成部分。该项目的最初目的是在六周内从杰维斯湾获得海流和风观测结果，以详细说明风力驱动的环流，并提供一组数据，用于与同时进行的数值模拟工作进行比较。然而，在最初的实验之后，很明显，海湾中有明显的海流，不仅仅与直接的风力有关。因此，必须通过测量程序和数据分析以及通过数值模拟来研究驱动流动的替代机制。结果是一系列的大约六个独立的实验，旨在定义海湾周围和海湾入口的水循环，以了解驱动电流的过程，并调查分层对电流性质的影响。<br /> <br /> 这六个实验中的第五个涉及在冬季部署声学多普勒海流剖面仪（ADCP），系泊在杰维斯湾（35 o 05'S，150 o 44 'E）的中部。ADCP测量水在整个水柱中移动的速度。它锚定在海底，不仅可以测量海底的流速，还可以等间隔地测量海面的流速。在这项实验中，ADCP系泊在海床上，在一个框架中，传感器向上看，距离海床约0.5米。<br /> <br /> 在1991年7月26日至1991年9月26日的冬季部署期间，ADCP设置为60分钟采样间隔，并在1 m深度箱上测量海流。箱号和海流被引用为海床以上的高度（由于潮汐和气压导致水深定义不确定）。因此，1号仓的中心位于传感器表面上方1.5m处或海床上方2.0m处。2号仓位于海床上方3米处，3号仓位于4米处，依此类推。<br /> 部署时测得的水深为24 m，前19个箱提供了良好的数据。20号仓以上的水流非常嘈杂，可以推断已经发生了污染。从数据集中删除这些箱。<br /> <br /> 由于这是父记录，因此没有数据可供下载。通过本记录可获得概述与本项目相关的元数据记录的结构和层次的PDF。另外还提供了一份已发表的工作文件的PDF格式，记录了这个实验和结果。只有一个子记录与此父记录直接相关，通过该子记录提供数据（参见层次树）：<br /> fef1f3c0-6d9f-11dd-8128-00188b4c0af8

This record describes components of the 'Jervis Bay Baseline Studies' project conducted by the Department of Defence, CSIRO and Australian Defence Force Academy (ADFA). The initial aims of the 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.<br /> <br /> The fifth of these six experiments involved the winter deployment of an Acoustic Doppler Current Profiler (ADCP), moored in the central part of Jervis Bay (35o 05'S, 150o 44'E). An ADCP measures how fast water is moving across an entire water column. Anchored to the seafloor it can measure current speed not just at the bottom, but also at equal intervals all the way up to the surface. For this experiment, the ADCP was moored on the seabed, in a frame, with sensors looking upwards and approximately 0.5m above the seabed.<br /> <br /> Over the winter deployment, 26th July 1991 to 26th September 1991, the ADCP was set-up with a 60 minute sampling interval and currents were measured over 1m depth bins. Bin numbers and currents are referenced as a height above the seabed (due to the uncertainty in defining water depth because of tides and air pressure). As such Bin #1 is centered at 1.5m above the transducer face or 2.0m above the seabed. Bin #2 is centered at 3m above the seabed, Bin #3 at 4m and so on.<br /> The water depth was measured as 24m on deployment and the first 19 bins provided good data. Currents from bin 20 up were very noisy and it is inferred that contamination had occurred. These bins were removed from the dataset.<br /> <br /> As this is a parent record, no data is available to download. A pdf outlining the structure and hierarchy of metadata records relating to this project is available through this record. Also available is a pdf of a published working paper documenting this experiment and the results. There is only one subsiduary records that directly relates to this parent, through which the data is provided (see hierarchical tree): <br /> fef1f3c0-6d9f-11dd-8128-00188b4c0af8