Tuesday , July 27 2021

Satellite Indicates Remaining Continent Remains Under Antarctica

Using gravitational data from the GOCE satellite, the researchers discovered the lost continent remains hidden under the Antarctic ice.

GOCE (Gravity field and Ocean Circulation Explorer) has spread to the world for more than four years from 2009 to 2013. Using the gravitational data set from GOCE, researchers have acquired new information about the structure and properties of Antarctica, which is one of the most important features. but the least understood parts of the world.

GOCE measures the Earth's gravitational field and looks at its land mass. Because the masses in the continents and the depth in the Earth's interior are not evenly or evenly distributed, the force of gravity therefore changes from one place to another and these gravity abnormalities can be used to solve structures under the surface.

During its four-year mission, GOCE scored an altitude of only 255 km, was closer than 500 km from the observing satellites on Earth and measured the gravity of the Earth more precisely than any mission before. This distance also allowed the GOCE satelltie to take highly accurate measurements of the earth's gravity on Antarctica; This is a relatively challenging place due to its distance and thick ice layer.

Combining satellite gravity data with seismological data, Antarctica created more accurate 3D maps of the deep interior and provided a great tool for investigating the structure of the least explored region on Earth.

Rac These gravity images change our ability to study the least-understood continent in Antarctica, görüntül said Fausto Ferraccioli, co-author of the British Institute of Geology and Geophysics in the British Antarctic Survey.

”In Eastern Antarctica, we see a mosaic of exciting geological features that uncovered the basic similarities and differences between the crust of Antarctica and the other continents united until 160 million years ago.“

The gravitational data reveal a more subtle shell and upper mantle compared to Eastern Antarctica, which consists of a mosaic of an ancient crater, separated by young orogens, revealing the bonds of Western Antarctica with Africa, India, Australia, Zealand and South America. show that it has.

Lus It is exciting to see that the direct use of gravitational gradients measured with GOCE for the first time has led to a new independent view of the world beyond Roger Haagmans, who is responsible for the GOCE mission, bağımsız said Roger Haagmans, the GOCE mission scientist at ESA. . ”It also includes the context of how continents are connected in the past before they separated from each other because of the plate movement.“

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