AUTHOR=Li Guancheng , Cheng Lijing , Pan Yuying , Wang Gongjie , Liu Hailong , Zhu Jiang , Zhang Bin , Ren Huanping , Wang Xutao TITLE=A global gridded ocean salinity dataset with 0.5° horizontal resolution since 1960 for the upper 2000 m JOURNAL=Frontiers in Marine Science VOLUME=10 YEAR=2023 URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2023.1108919 DOI=10.3389/fmars.2023.1108919 ISSN=2296-7745 ABSTRACT=
A gridded salinity dataset with high resolution is essential for investigating global ocean salinity variability and understanding its role in climate and the ocean ecosystem. In this study, a new version of the Institute of Atmospheric Physics gridded salinity dataset with a higher resolution (0.5° by 0.5°) is provided by using a revised ensemble optimal interpolation scheme with a dynamic ensemble. The performance of this dataset is evaluated using “subsample test” and the high-resolution satellite-based data. Compared with the previous 1° by 1° resolution IAP product, the new dataset is more capable of representing regional salinity changes with the meso-scale and small-scale signals (i.e., in the coastal and boundary currents regions), meanwhile, maintains the large-scale structure and variability. Therefore, the new dataset complements the previous data product. Besides, the new dataset is compared with