NASA-European Sea Level Mission Homes in on El Niño

Sea level data from a satellite launched by NASA and European partners shows that a swell of warm water hundreds of miles wide has arrived in the Pacific Ocean off the coast of South America, a sign that El Niño will likely emerge later in the year. Because water expands as it warms, a rise […]

NASA Analysis Shows La Niña Limited Sea Level Rise in 2025

A mild La Niña caused greater rainfall over the Amazon basin, which offset rising sea levels due to record warming of Earth’s oceans. The rise in the global mean sea level slowed in 2025 relative to the year before, an effect largely due to the La Niña conditions that persisted over most of the year. […]

NASA Sets Launch Coverage for International Ocean Tracking Mission

NASA will provide live coverage of prelaunch and launch activities for Sentinel-6B, an international mission delivering critical sea level and ocean data to protect coastal infrastructure, improve weather forecasting, and support commercial activities at sea. Launch is targeted at 12:21 a.m. EST, Monday, Nov. 17 (9:21 p.m. PST, Sunday, Nov. 16) aboard a SpaceX Falcon […]

NASA Sets Launch Coverage for International Ocean Tracking Mission

NASA will provide live coverage of prelaunch and launch activities for Sentinel-6B, an international mission delivering critical sea level and ocean data to protect coastal infrastructure, improve weather forecasting, and support commercial activities at sea. Launch is targeted at 12:21 a.m. EST, Monday, Nov. 17 (9:21 p.m. PST, Sunday, Nov. 16) aboard a SpaceX Falcon […]

How Joint NASA-ESA Sea Level Mission Will Help Hurricane Forecasts

Sentinel-6B will measure sea surface height for nearly all of the world’s ocean, providing important data for information products, including weather and hurricane forecasts. NASA has a long record of monitoring Earth’s sea surface height, information critical not only for tracking how the ocean changes over time but also for hurricane forecasting. These extreme storms […]

How Joint NASA-ESA Sea Level Mission Will Help Hurricane Forecasts

Sentinel-6B will measure sea surface height for nearly all of the world’s ocean, providing important data for information products, including weather and hurricane forecasts. NASA has a long record of monitoring Earth’s sea surface height, information critical not only for tracking how the ocean changes over time but also for hurricane forecasting. These extreme storms […]

NASA Analysis Shows Unexpected Amount of Sea Level Rise in 2024

Last year’s increase was due to an unusual amount of ocean warming, combined with meltwater from land-based ice such as glaciers. Global sea level rose faster than expected in 2024, mostly because of ocean water expanding as it warms, or thermal expansion. According to a NASA-led analysis, last year’s rate of rise was 0.23 inches […]