For decades, the world’s metrologists have had to occasionally add a “leap second” to our clocks on Earth, since traditionally the tendency was for our planet to begin to slow down due to tidal friction caused by the Moon, making our days last a breath longer than the theoretical 86,400 seconds that science has always told us. but this trend has changedand now the Earth has started spinning faster.
The consequence. Yes, when our planet was starting to slow down, I had to add one more second to our daily lives; When the opposite effect occurs, what should be done is to delete a second so that Coordinated Universal Time (UTC) does not become desynchronized from astronomical time. Something that will not be noticed, logically, but that has great importance in the causes that have led to this situation.
Because? The answer to this temporal enigma was published in Nature where science calculated that the massive melting of ice in Greenland and Antarctica has postponed the need for a second negative from 2026 to 2029, due to what is known as the ‘skater effect’ since an ice skater who turns on himself and wants to brake, extends his arms; If you want to speed up, you shrink them against your body.
Now, if we take this concept to our own planet, we can see that when the ice at the poles melts, the entire mass of water flows and is redistributed around the equator as if it were ‘opening its arms’, moving mass away from its central axis of rotation. In this way, the law of conservation of angular momentum tells us that this phenomenon causes a slowdown in movement. Then we can affirm that the thaw has counteracted and surpassed the acceleration of the Earth’s core that we had previously detected.
Your confirmation. What in 2024 was protection, today is backed by real-time mediations, and this means that if we go to the official data From the IERS, its most recent bulletins show us that the length of the day shows new positive values, so the acceleration has stopped and the Earth slows down slightly again.
If we look at the literature, this fits perfectly with research published in recent years, where it is seen that between 2000 and 2020 the days have lengthened at a rate of 1.33 milliseconds per century due to melting ice. And among the reasons they give, the authors are categorical in stating that the redistribution of masses due to climate change currently dominates the Earth’s rotation, even surpassing the historical effect of lunar friction.
It’s a race. Adding or subtracting seconds from our watches is not forever, since the International Bureau of Weights and Measures has already made the decision to definitively eliminate this practice starting in 2025. The reason? Current digital infrastructure, such as telecommunications networks, is at risk of collapsing every time time is manipulated.
Images | POT
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