PMA 1970s wave buoys

A dataset of multiple simultaneous wave buoy observations collected in the 1970s, primarily for the use of the local Port Authority, has recently been released, and is available for research purposes. The measurements were conducted in Port Philip Bay (PPB), situated in the Australian state of Victoria. PPB is a semi-enclosed embayment with a continuous deepwater (>10m) fetch of around 40-50km, where the extreme wind climate is primarily driven by eastward moving frontal systems.\n\nThe late 1960s and 1970s heralded the start of largescale offshore wave buoy deployments. For example, the JONSWAP experiment to measure spectral wave growth took place in the late 1960s and the New South Wales wave buoy network was installed in 1974 to monitor hazardous wave conditions. The data from these early field deployments are still relevant today given the significant expense in deploying buoys in remote conditions when compared to competing platforms (e.g. satellites) and inexpensive numerical modelling which can provide results at regional and global scales.\nLineage: The Port of Melbourne Authority undertook the data acquisition. Wind and Bulk spectral wave data were collected every 4 hours (in 10min bursts) by non-directional Datawell Waverider buoys for a 2.5 year period between Jul 1974 to March 1977. At any one time, up to three buoys were deployed. The campaign started with one buoy located at the northern part of the bay (Altona) and one at the southern part (Rosebud) for a period of one year. This was followed by three east bay locations (Rosebud, St Kilda and Aspendale) over spring of 1975. The final stage of the deployment compared a west bay buoy (St Leonards) to two east bay location (a combination of either Mount Martha, Mornington, Aspendale and/or Frankston).

本数据集收录了20世纪70年代采集的多台同步波浪浮标观测数据，最初专为当地港务局服务，近期已正式公开，可用于各类科研用途。本次观测作业在澳大利亚维多利亚州的菲利普港湾（Port Philip Bay, PPB）开展，该港湾为半封闭海湾，拥有连续的深水（水深＞10米）风区，风区长度约40至50公里，其极端风况主要由东移锋面系统驱动。

20世纪60年代末至70年代，标志着大规模近海波浪浮标部署工作的开端。例如，用于观测谱波浪演化的约森海谱（JONSWAP）实验于20世纪60年代末实施，新南威尔士州波浪浮标监测网则于1974年建成，用于监测灾害性海浪状况。鉴于在偏远海域部署浮标的成本远高于卫星等同类观测平台，且当前可通过低成本数值模拟技术获取区域乃至全球尺度的海浪结果，这些早期野外部署获取的数据至今仍具备重要研究价值。

数据谱系：墨尔本港务局负责本次数据的采集工作。1974年7月至1977年3月的2.5年周期内，项目采用无定向Datawell Waverider型浮标，每4小时进行一次时长为10分钟的采样，获取风速与全谱波浪数据。单次部署最多可同时布设3台浮标：项目初期，在海湾北部（阿尔托纳）与南部（罗斯巴德）各布设1台浮标，运行时长1年；1975年春季，新增海湾东部的3个观测站位（罗斯巴德、圣基尔达与阿斯彭代尔）；最后一个部署阶段，以海湾西部的圣伦纳德浮标为基准，与2个海湾东部观测站位（可选玛莎山、莫宁顿、阿斯彭代尔和/或弗兰克斯顿的组合）开展对比观测。