GEOXYGEN：全球月度网格化溶解氧数据产品（0.5°×0.5°）

GEOXYGEN 是一套全球0.5度月尺度的格点化溶解氧数据集，时间覆盖 1960 年 1 月至 2024 年 6 月，并提供从海表至 5500 m 的 176 个标准深度层。纬向网格并非严格等间距，在高纬度区域具有更高的网格密度。该产品基于分区域、分深度分层的机器学习重建框架，利用多源原位溶解氧观测，并结合客观分析的温度、盐度及环境预测因子进行训练与重建。观测数据经过系统质量控制流程，包括数据一致化处理、质量标志筛选、陆地样本剔除、重复记录检测、标准深度层映射以及离群值检查。产品以符合 CF 规范的 NetCDF 文件形式发布，适用于气候态与长期变率分析。
使用说明：由于近岸区域的不确定性远高于开阔海域，因此沿海和大陆架应用应优先采用空间聚合和时间平均的场，而非单个原始网格单元。

GEOXYGEN is a global gridded dissolved oxygen dataset with 0.5° spatial resolution and monthly temporal resolution, spanning from January 1960 to June 2024. It covers 176 standard depth levels ranging from the sea surface down to 5500 m. The zonal grids are not strictly equidistant, with higher grid density in high-latitude regions. This dataset is developed via a regional and depth-stratified machine learning reconstruction framework, which is trained on multi-source in-situ dissolved oxygen observations paired with objectively analyzed temperature, salinity, and environmental predictors for reconstruction. The observational data have undergone systematic quality control procedures, including data homogenization, quality flag filtering, removal of terrestrial samples, duplicate record detection, standard depth level mapping, and outlier inspection. This dataset is released in CF-compliant NetCDF format, suitable for climatology and long-term variability analyses.
Usage Note: Due to the significantly higher uncertainty in nearshore areas compared to open oceans, coastal and continental shelf applications should prioritize spatially aggregated and temporally averaged fields over individual original grid cells.