Map: Phosphate Annual Means in the Northern Marine Region

Map of annual mean of phosphate in Northern Marine Region produced from CARS2000 mean and seasonal fields 0.1 degree spaced grid. Phosphate, linearly interpolated from CARS2000 mean and seasonal fields to 0.1 degree spaced grid, at depths of 0, 150, 500, 1000 and 2000 metres. The loess filter used to create CARS2000 resolves at each point a mean value and a sinusoid with 1 year period (and in some cases a 6 month period sinusoid - the "semi-annual cycle".) The provided "annual amplitude" is simply the magnitude of that annual sinusoid.adjacent data points. The loess filter used to create CARS2000 resolves at each point a mean value and a sinusoid with 1 year period (and in some cases a 6 month period sinusoid - the "semi-annual cycle".) The provided "annual amplitude" is simply the magnitude of that annual sinusoid. CARS is a set of seasonal maps of temperature, salinity, dissolved oxygen, nitrate, phosphate and silicate, generated using Loess mapping from all available oceanographic data in the region. It covers the region 100-200E, 50-0S, on a 0.5 degree grid, and on 56 standard depth levels. Higher resolution versions are also available for the Australian continental shelf. The data was obtained from the World Ocean Atlas 98 and CSIRO Marine and NIWA archives. It was designed to improve on the Levitus WOA98 Atlas, in the Australian region. This map has been produced by CSIRO for the National Oceans Office, as part of an ongoing commitment to natural resource planning and management through the 'National Marine Bioregionalisation' project.

本数据集为基于CARS2000平均场与季节场生成的北部海域磷酸盐年平均值分布图，网格间距为0.1度。磷酸盐数据通过将CARS2000平均场与季节场线性插值至0.1度间距网格得到，涵盖0、150、500、1000及2000米五个深度层级。用于构建CARS2000的局部加权回归散点平滑（Loess）滤波器可在每个点位解析出平均值与周期为1年的正弦曲线（部分场景下还包含周期6个月的正弦曲线，即“半年周期循环”），本次提供的“年振幅”即为该年度正弦曲线的幅值。CARS是一套包含温度、盐度、溶解氧、硝酸盐、磷酸盐及硅酸盐的季节分布图集，通过对北部海域内所有可用海洋学数据应用Loess映射生成。该图集覆盖100°E-200°E、50°S-0°S的海域，采用0.5度间距网格，包含56个标准深度层级；澳大利亚大陆架区域还提供更高分辨率的衍生版本。本数据集的数据源自《世界海洋图集1998》（World Ocean Atlas 98，WOA98）以及澳大利亚联邦科学与工业研究组织（CSIRO）海洋档案馆与新西兰国家水与大气研究所（NIWA）档案库，其旨在针对澳大利亚海域优化Levitus发布的WOA98图集。本分布图由CSIRO为国家海洋办公室制作，作为“国家海洋生物区划”项目的一部分，以持续推进自然资源规划与管理工作。