On May 6 from 8:00 to 9:00 a.m. (US Eastern Time), the Data Catalog and Earthdata Search search may be temporarily unavailable due to maintenance of the NASA Common Metadata Repository (CMR).

We are in the process of migrating all NASA Earth science data sites into Earthdata from now until end of 2026. Not all NASA Earth science data and resources will appear here until then. Thank you for your patience as we make this transition. Read about the Web Unification Project

Terrestrial Hydrosphere News

Articles, resources, and announcements from Terrestrial Hydrosphere.

View all News and Announcements

Global coverage of the Surface Water and Ocean Topography (SWOT) River Reach collection highlighting its 21 day global cycle of Water Surface Elevation (WSE).

From Space to Solutions: Access, Visualization, and Analysis Services for SWOT Hydrology

Join us on Wed., July 30 at 2:00 p.m. EDT (-04:00 UTC) to explore SWOT hydrology data collections of rivers and lakes, and to learn how to work with SWOT hydrology data using tools provided by both NASA's PO.DAAC and the USGS.

Webinar

July 18, 2025

This image shows flooding in Argentina with VIIRS data.

Monitor Floods Globally and in Near Real-Time With VIIRS

The new VIIRS near real-time product is already in use, and users are encouraged to explore this replacement option for MODIS-based flood products.

Blog

June 2, 2025

Chlorophyll a concentrations in the Great Salt Lake, Utah on May 21, 2025 from the VIIRS instrument aboard the joint NASA/NOAA Suomi NPP satellite

Chlorophyll a Concentrations in the Great Salt Lake, Utah, USA

Image captured May 21, 2025, by the VIIRS instrument aboard the joint NASA/NOAA Suomi NPP platform.

Worldview Image of the Week

May 22, 2025

An ASTER image showing part of the San Quintín Glacier, the largest in southern Chile’s Northern Patagonia Icefield.

GLIMS Database Advances Glacier Monitoring from Space

The Global Land Ice Measurements from Space (GLIMS) Glacier Database provides timely data on more than 200,000 glaciers around the world.

Feature Article

April 8, 2025

$ATL24 data for Marathon, Florida, illustrating the automatic detection and processing of ICESat-2 bathymetry. The top panel shows the location of the ATL24 segment extending from Vaca Key Bight south approximately 4 km. The bottom panel shows the ATL24 bathymetry profile from the shoreline to depths of 12 m. Aqua points correspond to detected sea surface, blue to bathymetry, and white to low-confidence bathymetry. Refraction correction has been applied to all bathymetric points.$