A recent study published in Geophysical Research Letters revealed that the human action of pumping water from the soil and transferring it to other areas resulted in a significant displacement of the Earth.
Between 1993 and 2010, the Earth is estimated to have tilted approximately 80 centimeters (31.5 inches) eastward as a result of this process.
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This displacement occurs due to mass redistribution caused by large-scale groundwater extraction. Removing large amounts of water from certain regions causes the Earth's mass to be redistributed, resulting in changes in the planet's rotation.
The amount of water we extract has changed the Earth's natural rotation
Scientists use a variety of methods to assess the impact of groundwater extraction, such as monitoring of water levels in wells, measuring river flows and assessing changes in water storage in different regions.
One of the approaches to understanding the impact of groundwater redistribution on Earth is related to the rotational pole of the planet, which is the point around which the Earth rotates. This point is not fixed and can vary in relation to the earth's crust, in a process known as polar motion.
During polar motion, changes in the distribution of water across the planet affect how mass is distributed. It's similar to adding a little weight to a top, where the Earth rotates subtly differently as the water moves.
By pumping large amounts of groundwater and transferring it elsewhere, humans cause significant redistribution of mass. This, in turn, affects the motion of Earth's rotational pole, leading to observable changes in its position over time.
According to a study led by geophysicist Ki-Weon Seo of Seoul National University, it was found that the Groundwater redistribution has the greatest impact on Earth's rotational pole drift among causes climate related.
The study shows that changes in the distribution of water on the planet significantly affect the movement of the rotational pole, influencing its variation over time.
The discovery of the ability of water to influence the Earth's rotation was made in 2016, however, until recently, the specific contribution of groundwater to these rotational changes was not yet known. been explored.
In the most recent study, the researchers performed modeling to investigate observed changes in Earth's rotational pole drift and water movement.
Using climate data and information, they examined how water redistribution groundwater affects the Earth's mass balance and therefore influences the pole drift rotational.
This approach allowed a better understanding of the specific impact of groundwater on this phenomenon.
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