Data in Action: The 2022 Hunga-Tonga Hunga-Ha′apai eruption - Altimetry data and models help us understand how a volcanic eruption generated a tsunami
Dataset Highlight: River Discharge from the SWOT Mission
Dr. Hind Oubanas, CNES’s Surface Water and Ocean Topography (SWOT) Hydrology Science Lead, gives an overview of SWOT river discharge data products and algorithm development. Specifically, the Dr. Oubanas describes the work of the SWOT Discharge Algorithms Working Group (DAWG), detailing how river discharge is derived from SWOT observations, and what products are being developed and validated.
Data in Action: The rate of global sea level rise doubled during the past three decades
Global Mean Sea Level time series from 1993 to 2023 from altimetry. Past and current altimetry measurements allow us to monitor global sea level and to make projections for the future. If the current trajectory continues, global sea levels will increase by more than 16.9 cm over the next three decades.
Data in Action: Deep Learning Improves Global Satellite Observations of Ocean Eddy Dynamics
Mesoscale eddies, circular currents of water with diameters spanning from 50 to 300 kilometers, transport freshwater, heat, carbon, nutrients, etc. around the world and within the ocean, profoundly impacting marine ecosystems and the Earth's climate.
Worldview Tour Story: El Nino Impacts Around the Globe
Learn about recent El Nino events through Sea Surface Temperature (SST) anomalies in the Pacific Ocean
Data in Action: OPERA: Mapping Flood Waters in the Face of the Storm
On September 26, 2024, Hurricane Helene made landfall in the Big Bend area of the Florida Gulf Coast as a CAT 4 storm, causing coastal flooding from 15 feet of storm surge.
New PO.DAAC animation now available!
COWVR Level 2 Wind Speed - First Year of Operation

Science Disciplines

Ocean

Cryosphere

Terrestrial Hydrosphere

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Ocean Measurements

The Ocean includes geophysical parameters that characterize the oceans (e.g., temperature, salinity, sea surface topography, circulation, etc.) as well as those physical processes operating within the Earth’s oceans and at its surface. Select from below to learn more about the related measurements.

Ocean Temperature

Ocean Waves

Ocean Winds

Salinity/Density

Ocean Surface Topography

Ocean Circulation

Ocean Heat Budget

Gravity/Gravitational Field

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Cryosphere Measurements

The Cryosphere includes the portions of Earth's surface where water is in solid form, including sea ice, snow cover, glaciers, ice sheets, and frozen ground. Select from below to learn more about the related measurements.

Glaciers/Ice Sheets

Sea Ice

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Terrestrial Hydrosphere Measurements

Terrestrial Hydrosphere includes water on the land surface and underground in the form of lakes, rivers, groundwater, and total water storage. Select from below to learn more about the related measurements.

Surface Water

Announcements

Apr

Schedule update for SWOT Science Data Products Transition from Version C to Version D

Dear SWOT User Community,

As a follow-up to the original announcement, the transition to SWOT Version D products has been tentatively postponed by one week, and a new schedule is planned as follows:

Version D products will be generated for all measurements spanning the start of the calibration phase onward, and consist of:

Reprocessed products for observations from the start of the calibration phase (March 30, 2023) through cycle 32 (~May 19, 2025). The reprocessing of SWOT KaRIn Version D products is scheduled to start in April 2025 and is expected to complete in early 2026.
Forward-processed products for measurements from May 6, 2025 onward.

Apr

SWOT Science Data Products Transitioning from Version C to Version D on April 28, 2025

Dear SWOT User Community,

The joint NASA/CNES SWOT project is pleased to announce the upcoming transition of SWOT science data products from Version C to Version D.

The Version D products resolve several known issues in the Version C KaRIn science data products.
They are generated with updated processing algorithms, calibration parameters, and some geophysical models.
This release is referred to as Version D0.

Apr

Release of NASA-SSH Sea Surface Height Indicators Collections

The PO.DAAC is pleased to announce the public release of the NASA-SSH Sea Surface Height Indicators datasets produced by NASA. Four distinct datasets are released. The indicator values were calculated using data from the NASA-SSH Simple Gridded Sea Surface Height from Standardized Reference Missions Only Version 1 dataset (doi.org/10.5067/NSREF-SG0V1). More information regarding NASA-SSH is available from PO.DAAC’s NASA-SSH mission page.

Mar

Release of NASA-SSH Reference Collections

The PO.DAAC is pleased to announce the public release of the NASA-SSH Sea Surface Height from Standardized Reference Missions Only Version 1 datasets produced by NASA. Two distinct datasets are released. The datasets are produced from observations of sea surface height from the radar altimeter satellites in the reference mission orbits, including TOPEX/Poseidon, the Jason series, and Sentinel-6. All missions have been referenced to a common baseline, additional quality control has been performed, and errors with wavelengths around one orbital cycle have been reduced. More information regarding NASA-SSH is available from PO.DAAC’s NASA-SSH mission page.

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Science Disciplines

Ocean Measurements

Cryosphere Measurements

Terrestrial Hydrosphere Measurements

Announcements