Data in Action: Sentinel-6B will continue TOPEX/Poseidon, Jason-1,-2,-3, and Sentinel-6 Michael Freilich legacy
Sentinel-6B launched in November 2025 and will continue the decades-long record of sea level measurements with an inch accuracy.
Data in Action: Sentinel-6B will continue TOPEX/Poseidon, Jason-1,-2,-3, and Sentinel-6 Michael Freilich legacy
Sentinel-6B launched in November 2025 and will continue the decades-long record of sea level measurements with an inch accuracy.
Data in Action: Potential of SWOT for Sea Ice Monitoring Unveiled
The study underscores SWOT’s potential to provide two-dimensional estimates of sea ice thickness—essential to quantify exchanges between sea ice, the atmosphere, and the ocean, which current altimeters cannot provide. SWOT sea ice measurements can also support applications that demand greater spatial coverage and more frequent sampling, including process studies, seasonal forecasting, and navigation.
NASA Data Training Webinar August 21, 2025: Topic- Access Virtualized PO.DAAC Oceanography Data
Learn how to use Python and Xarray to access virtualized, exploratIon- and analysis-ready physical oceanography datasets from NASA's PO.DAAC.
NASA Earthdata Webinar July 30, 2025: From Space to Solutions: Access, Visualization, and Analysis Services for SWOT Hydrology
Learn how to work with SWOT hydrology data using tools provided by NASA's PO.DAAC and USGS.
Data in Action: Sediment Accumulation at the Amazon Coast Observed by Satellite Gravimetry
By accurately measuring month-to-month mass changes across the Earth, a recent study shows that GRACE and GRACE-FO can be used to detect sediment accumulation. With more than 20 years of data, subtle mass changes can now be observed.
Data in Action: Deep Learning Improves Global Satellite Observations of Ocean Eddy Dynamics
Animation Caption: Sea Surface Height Anomaly (SSHA) from -30 cm (blue) to 30 cm (red) over the global ocean, arrows on top represent the ocean currents. The circular shapes of those anomalies are mesoscale eddies. The panels present a side-by-side comparison between the NeurOST method and the conventional method widely used. First, the SSHA, then the derived ocean current speed and finally the vorticity are shown to illustrate NeurOST’s capability to retrieve fine details of the ocean eddies.
COMPLETED: PO.DAAC Phase 1 - Operational Switch from PO.DAAC Drive to Cloud Only Distribution
2022-01-31
Starting today, January 31, 2022 at 20:00 UTC, PO.DAAC has removed PO.DAAC Drive access to the Phase 1 datasets. They will be available ONLY through our Earthdata Cloud end-points.
Earthdata Cloud access end-points for the above listed datasets can be found on the respective dataset landing pages under Data Access tab. An additional CLOUD DATASETS listing page for cloud enabled datasets is available on the PO.DAAC Web Portal, which offers more tool/service integration.
Newsletter:
IPRC/SOEST Optimally Interpolated Sea Surface Salinity (OISSS) Aquarius V5.0 Dataset Released
2018-07-27
The Physical Oceanography Distributed Active Archive Center (PO.DAAC) is pleased to announce the availability of the Level 4 optimally interpolated, 0.5 degree, near-global, 7-day sea surface salinity (OISSS) product for version 5.0 of the Aquarius/SAC-D dataset. OISSS is a principal investigator produced dataset developed at the International Pacific Research Center (IPRC) of the University of Hawaii at Manoa, School of Ocean and Earth Science and Technology (SOEST). The optimal interpolation
Newsletter:
2017, another strong year for hurricanes (October, 2017)
From a distance, up beyond the destruction, hurricanes are wondrous acts of nature. They form as a way for very warm ocean waters to discharge heat quickly. They’re these efficient and complex areas where the ocean and atmosphere trade energy; Earth’s way of rapidly transporting accumulated heat energy from the tropical regions to the extra-tropics when the regular oceanic or atmospheric circulation mechanisms are too slow to sufficiently export the extra heat.