International Sea Level Satellite Takes Over From Predecessor

Meltwater from Greenland glaciers like the one pictured can contribute significantly to sea level rise. Sentinel-6 Michael Freilich monitors the height of Earth’s oceans so that researchers can better understand the amount and rate of sea level rise. (Credits: NASA Earth Observatory using Landsat data from USGS)

Sentinel-6 Michael Freilich, the newest addition to a long line of ocean-monitoring satellites, becomes the reference satellite for sea level measurements.

PASADENA, Calif. (NASA PR) — On March 22, the newest U.S.-European sea level satellite, named Sentinel-6 Michael Freilich, became the official reference satellite for global sea level measurements. This means that sea surface height data collected by other satellites will be compared to the information produced by Sentinel-6 Michael Freilich to ensure their accuracy.

(more…)

Major Ocean-Observing Satellite Starts Providing Science Data

This map shows sea level measured by the Sentinel-6 Michael Freilich satellite from June 5 to15. Red areas are regions where sea level is higher than normal, and blue areas indicate areas where it’s lower than normal. (Credit: NASA Earth Observatory)

Sentinel-6 Michael Freilich, the latest spacecraft to monitor sea surface height, releases its first science measurements to users.

PASADENA, Calif. (NASA PR) — After six months of check-out and calibration in orbit, the Sentinel-6 Michael Freilich satellite will make its first two data streams available to the public on June 22. It launched from Vandenberg Air Force Base in California on Nov. 21, 2020, and is a U.S.-European collaboration to measure sea surface height and other key ocean features, such as ocean surface wind speed and wave height.

(more…)

Warming Seas Are Accelerating Greenland’s Glacier Retreat

To measure water depth and salinity, the OMG project dropped probes by plane into fjords along Greenland’s coast. Shown here is one such fjord in which a glacier is undercut by warming water. The brown water is caused by sediment being dredged up from the base of the glacier by meltwater plumes. (Credits: NASA/JPL-Caltech)

Scientists with NASA’s Oceans Melting Greenland mission are probing deep below the island’s warming coastal waters to help us better predict the rising seas of the future.

PASADENA, Calif. (NASA PR) — Greenland’s melting glaciers, which plunge into Arctic waters via steep-sided inlets, or fjords, are among the main contributors to global sea level rise in response to climate change. Gaining a better understanding of how warming ocean water affects these glaciers will help improve predictions of their fate. Such predictions could in turn be used by communities around the world to better prepare for flooding and mitigate coastal ecosystem damage.

(more…)