Sea Surface Mean Height and Currents in the Australian Region

Dynamic height of sea surface height and currents referenced to 2000m, computed from CARS2000 3-dimensional seasonal temperature and salinity fields. Monthly values derived from annual and semi-annual temperature and salinity cycles. 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. All known reliable published data is used, but this is still very sparse in the SW, at depth, and especially for some nutrients. In many places strong interannual signals (which in many cases we do not attempt to resolve nor compensate for) may be aliased into spatial or seasonal signals.

以2000米深度为参考基准的海面动力高度与海流数据，由CARS2000的三维季节温度和盐度场计算得到。其逐月数据由年周期与半年周期的温度、盐度循环特征推导生成。CARS是一套涵盖温度、盐度、溶解氧、硝酸盐、磷酸盐及硅酸盐的季节分布图集，基于研究区域内所有可用海洋学观测数据，通过局部加权回归（Loess）映射法处理生成。该数据集覆盖东经100°至200°、南纬50°至0°的海域，空间网格分辨率为0.5°，并包含56个标准深度层。针对澳大利亚大陆架区域，还提供了更高空间分辨率的数据集版本。本数据集的数据来源于《世界海洋图集1998》（World Ocean Atlas 98）以及CSIRO海洋研究部门与NIWA的档案库。该数据集旨在针对澳大利亚海域，对Levitus编制的《WOA98图集》进行优化完善。本数据集采用了所有已公开的可靠海洋观测数据，但在西南海域、深层水体以及部分营养盐相关参数方面，观测数据依然十分匮乏。在诸多海域中，较强的年际信号（多数情况下我们未对其进行解译或校正）可能会被混叠为空间信号或季节信号。