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TWS is defined as all forms of water stored on the Earth’s surface, including surface water, soil moisture, groundwater, vegetation, snow, ice and permafrost. The iron is super hot (over 5,432 degrees Fahrenheit) and is as runny as water, meaning it flows very easily.Īs the liquid flows, it drags the magnetic field with it – and its corresponding magnetic north and south poles.īut the way water is distributed on Earth’s surface is another factor that drives the drift, according to the Chinese experts – namely, terrestrial water storage (TWS). It’s already known that Earth’s magnetic field is created by the movement of liquid iron in the Earth’s outer core, some 1,800 miles below our feet. Previous research has determined recent movements of the North Pole away from Canada and toward Russia, caused by factors like molten iron in the Earth’s outer core. It could change the length of day we experience, but only by milliseconds. Humphrey said the change to the Earth’s axis isn’t large enough that it would affect daily life. ‘It tells you how strong this mass change is – it’s so big that it can change the axis of the Earth.’ ‘I think it brings an interesting piece of evidence to this question,’ said Humphrey. The same thing happens to the Earth as weight is shifted from one area to the other. If the weight of a top is moved around, the spinning top would start to lean and wobble as its rotational axis changes. The Earth spins around an axis kind of like a top, explains Vincent Humphrey, a climate scientist at the University of Zurich who was not involved in this research. This is because these variations can cause havoc for aviation and navigation systems, including smartphone apps that use GPS, that rely on accurate magnetic field readings.
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The magnetic north and south Poles, meanwhile, are constantly moving and over time become misaligned with their geographic equivalents – something known as ‘polar wandering’.īut this is due to processes that scientists don’t always completely understand. The geographic north and south poles are in a fixed position and are diametrically opposite one another. The magnetic north and south poles are different from the geographic north and south poles. This illustration shows the change in position of the magnetic north poleīecause Earth’s magnetic north and south poles are disturbed and thrown in different directions by variations in mass, scientists have to continuously track their position. Shifts in the geographic location of Earth’s North and South poles is called polar drift, or true polar wander. This change in mass caused the movement of the magnetic poles to turn and accelerate eastward, they say.Įarth’s magnetic north and south poles are constantly moving – a phenomenon known as ‘polar wandering’ – unlike the geographic north and south poles, which stay in a fixed position. Rising global temperatures caused by humans are to blame for shifts in the Earth’s magnetic field, a new study claims.Ĭhinese researchers reveal melting glaciers from climate change caused shifts in the Earth’s mass in the mid-1990s. Chinese experts explored the relationship between water loss and polar motion.This is partly due to changes in Earth’s mass, triggered by loss of water on land.Magnetic north and south poles are ‘wandering’ – or changing position over time.
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Climate change has shifted Earth’s POLES: Faster ice melting under global warming is causing the magnetic north and south poles to drift around the surface of our planet