November 2025: NEW DATA AVAILABLE
Data from 2023 to early 2025 are included in the data base.

Number of SSS observations per 1° longitude and 1° latitude, expressed in decimal logarithm scale, as obtained from voluntary observing ships during 1993-2025.
Data from 2023 to early 2025 are included in the data base.
Data for Indian Ocean from year 2024 and for polar/subpolar regions from years 2022-2023 are included in the data base.
Data for Indian Ocean from year 2023 are included in the data base.
Data collected in the Southern Ocean between Tasmania and Antarctica from November 9, 2023 to March 1, 2024 are included in the data base.
Data for Pacific Ocean from year 2022 are included in the data base.
Data for Atlantic Ocean from year 2022 are included in the data base.