The hydrodynamic regime at John Brewer Reef, Great Barrier Reef: Mooring CM3: Current Meter

An Aanderaa RCM current meter was attached to mooring CM3, which was deployed in 40m of water. Deployment Details:Date Deployed: 3/4/1987Date Recovered: 5/9/1987Instrument Deployed:RCM #6021; Depth: 20m The aim of this project was to collect field data to calibrate a numerical model for the combined tidal and wind-forced circulation at John Brewer Reef, and to apply those circulation patterns to calculate the trajectories, residence times and likelihood of outbreaks of crown-of-thorns starfish on areas of the reef. The model boundary was defined by CM1, CM2, CM3, CM4, CM5 and CM13. However, the current meters attached to moorings CM5 (deployed 2/4/87) and CM13 (deployed 1/4/87) were not recovered. Mooring CM4 (deployed 2/4/87)drifted to the Whitsunday Islands. The current meter was badly fouled and the data were unusable.The transect CM3, CM8 and CM9 was laid to investigate the interaction between John Brewer Reef and Lodestone Reef. These reefs are only 7km apart and by studying both reefs at the same time it was possible to consider inter-reefal recruitment of crown-of-thorns starfish as well as self-seeding. The current meter attached to mooring CM9 (deployed 3/4/87) was not recovered.

本研究将安德拉（Aanderaa）RCM型海流计搭载于锚系CM3，该锚系布设于40米水深海域。部署详情如下：部署日期：1987年3月4日；回收日期：1987年5月9日；搭载仪器型号：RCM #6021；布设水深：20米。
本项目的核心目标为采集原位实测数据，以率定约翰·布鲁尔礁（John Brewer Reef）区域潮汐与风强迫联合环流的数值模型；并依托该环流模式，计算该礁域内长棘海星（crown-of-thorns starfish）的运移轨迹、滞留时长及暴发概率。
该数值模型的边界由锚系CM1、CM2、CM3、CM4、CM5及CM13共同划定。但锚系CM5（部署日期1987年2月4日）与CM13（部署日期1987年1月4日）所搭载的海流计均未回收。
锚系CM4（部署日期1987年2月4日）漂移至圣灵群岛（Whitsunday Islands），其所搭载的海流计严重附着海洋生物污损，导致采集数据无效。
为探究约翰·布鲁尔礁与磁铁礁（Lodestone Reef）间的动力相互作用，布设了由CM3、CM8及CM9组成的观测断面。两处礁体间距仅7千米，通过同步开展两处礁体的观测研究，可同时分析长棘海星的礁间种群补充与局地自播繁殖过程。锚系CM9（部署日期1987年3月4日）所搭载的海流计未获回收。