Hydrodynamics at the whole of Great Barrier Reef scale (MTSRF Project 2.5i.1)

A three-dimensional whole-of-GBR baroclinic hydrodynamic model was applied at a spatial resolution of between 1 and 4 km. The model simulations are compiled to examine the intensity, duration and frequency of different lower salinity events. Return periods are then calculated from the annual frequency of such events.

The model includes the factors affecting currents, mixing, temperature and salinity within the GBR lagoon and exchanges with the adjacent Coral Sea: river discharge, time-series wind, tidal.

Accurate boundary forcing for offshore ocean boundaries was provided by a global, data-assimilating, eddy-resolving model.

本研究采用空间分辨率为1~4 km的三维全区域大堡礁（Great Barrier Reef，GBR）斜压水动力模式。基于该模型的模拟结果，本研究分析了不同低盐度事件的强度、持续时长与发生频次，并基于此类事件的年发生频次计算其重现期。
该模式涵盖了影响大堡礁潟湖内流场、混合过程、温度与盐度，以及其与邻近珊瑚海水交换的各类驱动因子，具体包括河流径流量、时序风场与潮汐动力。
模型的外海边界条件由一套全球数据同化涡分辨率海洋模式提供精准边界强迫。