GEOMACS (Geological and Oceanographic Model of Australias Continental Shelf) Q50

Geoscience Australias GEOMACS model was utilised to produce hindcast hourly time series of continental shelf (~20 to 300 m depth) bed shear stress (unit of measure: Pascal, Pa) on a 0.1 degree grid covering the period March 1997 to February 2008 (inclusive). The hindcast data represents the combined contribution to the bed shear stress by waves, tides, wind and density-driven circulation. Included in the parameters that represent the magnitude of the bulk of the data are the quartiles of the distribution; Q25, Q50 and Q75 (i.e. the values for which 25, 50 and 75 percent of the observations fall below). Q50, or the 0.5 Quartile of the Geomacs output, represents the values for which 50% of the observations fall below (Hughes and Harris 2008). This dataset is a contribution to the CERF Marine Biodiversity Hub and is hosted temporarily by CMAR on behalf of Geoscience Australia.

澳大利亚地质科学局（Geoscience Australia）所采用的GEOMACS模型，被用于生成1997年3月至2008年2月（含首尾时段）、基于0.1度计算网格的大陆架（水深约20至300米）区域的床面剪切应力逐小时后报时间序列，该应力的计量单位为帕斯卡（Pascal，Pa）。该后报数据反映了波浪、潮汐、风力以及密度环流对床面剪切应力的综合贡献。表征该数据集主体特征的参数包含分布四分位数：Q25、Q50与Q75（即分别有25%、50%、75%的观测值低于该数值）。其中Q50，即GEOMACS输出结果的0.5分位数，代表有50%的观测值低于该数值（Hughes与Harris，2008）。本数据集为CERF海洋生物多样性枢纽（CERF Marine Biodiversity Hub）的贡献数据，暂由CMAR代表澳大利亚地质科学局（Geoscience Australia）托管。