ESA


Ice Loss in Greenland

This map of Greenland ice sheet velocity was created using data from Sentinel-1A in January–March 2015 and complemented by the routine 12-day repeat acquisitions of the margins since June 2015. About 1200 radar scenes from the satellite’s wide-swath mode were used to produce the map, which clearly shows dynamic glacier outlets around the Greenland coast. In particular, the Zachariae Isstrom glacier in the northeast is changing rapidly, and recently reported as having become unmoored from a stabilising sill and now crumbling into the North Atlantic Ocean. (Colour scale in metres per day).This map of Greenland ice sheet velocity was created using data from Sentinel-1A in January–March 2015 and complemented by the routine 12-day repeat acquisitions of the margins since June 2015. About 1200 radar scenes from the satellite’s wide-swath mode were used to produce the map, which clearly shows dynamic glacier outlets around the Greenland coast. In particular, the Zachariae Isstrom glacier in the northeast is changing rapidly, and recently reported as having become unmoored from a stabilising sill and now crumbling into the North Atlantic Ocean. (Colour scale in metres per day). Map from modified Copernicus Sentinel data (2015)/ENVEO/ESA CCI/FFG.

Recent research has shown that one of Greeland’s largest glaciers is losing up to five billion tons of ice every year as it melts into the ocean.

How the Earth’s Magnetic Field is Changing

‘Snapshot’ of the main magnetic field at Earth’s surface as of June 2014 based on Swarm data. The measurements are dominated by the magnetic contribution from Earth’s core (about 95%) while the contributions from other sources (the mantle, crust, oceans, ionosphere and magnetosphere) make up the rest. Red represents areas where the magnetic field is stronger, while blues show areas where it is weaker. Source: ESA/DTU Space

The earth’s magnetic field protects our world from bombarding cosmic radiation and charge particles from outer space.  The field itself is in flux, constantly changing.  In November of 2013, the European Space Agency launched the three satellite constellation known as Swarm. Changes in the Earth’s Magnetic Field The ESA recently released […]