Sea Surface Height Monthly Standard Variability in the Australian Region

Monthly standard deviation of sea surface height (in metres) estimated on a 0.2 x 0.2 degree grid for the region: 90E-180E, 60S-0. Data used in making the estimates are the gridded maps of height for 1993-2001 based on tide gauge and altimeter observations. The gridded fields are created using optimal interpolation and the grid scale is smaller than the largest gaps between satellite tracks so fine scale O(50km) height gradients in the ocean are often missed. For most of the time data were only available from two satellites and at times only one.

本数据集为覆盖90°E-180°E、60°S-0°区域，在0.2×0.2度网格上估算得到的海面高度月标准差（单位：米）。本次估算所采用的数据，为1993-2001年基于验潮仪（tide gauge）与高度计（altimeter）观测生成的海面高度网格化图件。该网格化场通过最优插值（optimal interpolation）方法构建，由于其网格尺度小于卫星轨道间的最大间隙，因此海洋中约50公里精细尺度的海面高度梯度常被遗漏。多数时段仅可获取两颗卫星的观测数据，部分时段甚至仅有单颗卫星的数据可供使用。