Earth’s Magnetic Field is Shifting and Geologists Don’t Know Why
Something strange is happening with the Earth’s magnetic field and scientists are unsure why, according to a recent paper published in the journal Nature. A consortium of geologists in charge of the World Magnetic Model is having trouble keeping track of the planet’s magnetic north pole as it rapidly shifts from Canada to Northern Siberia.
Scientists updated Earth’s magnetic model in 2015, which is used for some pretty important things, including shipping navigation and GPS on smartphones. Their model was intended to last for at least five years, but due to the recent unexpected swing, it became outdated at some point in early 2018 and is now in need of adjustment.
“The error is increasing all the time,” said Arnaud Chulliat, a geomagnetist at the University of Colorado Boulder and the National Oceanic and Atmospheric Administration’s National Centers for Environmental Information.
Scientists say this shift is being driven by liquid iron sloshing around in the planet’s core, a natural process, but one that can vary as the flow changes. Over the past 20 million years, Earth’s magnetic field has consistently experienced a complete pole reversal – usually every 200-300,000 years.
At the moment, we’re long overdue for one of these events, with the last reversal having occurred 781,000 years ago. No one is quite sure what the consequences will be on modern infrastructure when and if that reversal happens. Many take ease in the fact that pole reversals have occurred hundreds of times in the planet’s history without catastrophe, but again, the effect on modern technology remains unknown.
Some scientists have pointed to this shift as a potential culprit in a slew of recent dolphin and whale beachings as well as other unexpected animal die-offs. It’s believed the planet’s natural magnetic field is necessary to some of these animals’ navigation when traveling and communicating over great distances underwater. One NASA scientist is currently looking into this potential connection.
In 2016, a larger-than-usual magnetic pulse shot up from South America, which scientists believe played a role in furthering the recent shift. However, they’re still unsure whether it will continue on this course, or even what will happen at all.
Could we be on the precipice of a massive geomagnetic reversal, or is this just due to slightly-more-anomalous-than-usual activity in the Earth’s core? And what’s even more pressing – what kind of effects is this having on us?
For more on our brain’s relationship with Earth’s magnetic field, check out this Gaia Original short:
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Defying Physics by Breaking the Laws of Thermodynamics
As modern and rational beings, we have come to rely on certain irrefutable natural laws. The sun rises and sets. The planet rotates around the sun. Out of all of these, the laws of physics and thermodynamics, a branch of physics, have defined humans’ relationship to heat, temperature, energy, work, radiation, and matter. But what happens when the laws of physics are defied? Such may be the case with instances in which scientists claim to have broken the laws of thermodynamics.
But before we dive into these cases, it’s important to understand the actual laws, so we can better understand the ways in which they might be broken.
The Laws of Thermodynamics
What is the definition of thermodynamics? Simply put, thermodynamics is a branch of physics that deals with the relationships between heat and other forms of energy. In particular, it describes how thermal energy is converted to and from other forms of energy and how it affects matter. Thermodynamics is widely applied in a number of engineering disciplines and meteorology, as well as evolutionary psychology, statistical mechanics, and even economics. Central to thermodynamics are four laws:
- First Law is known as the law of conservation of energy, in which energy can be transformed, but it cannot be created or destroyed. The first thermodynamic law relates to a containment of energy
- Second Law defines a closed system in which isolation, or entropy occurs and stays constant, or increases, unless there is an outside force or influence at play. To simplify this concept, think of your morning coffee that loses its heat by the third sip, is entropy in action in our everyday life.
- Third Law is the law of “absolute zero,” the temperature of −273.16°C (−459.69°F), or the coldest temperature possible where no heat exists. It is believed that the state of absolute zero is unattainable.
- Zeroth Law, the fourth law, states that if two thermodynamic systems are in thermal equilibrium with a third system, then the two systems are also in thermal equilibrium with each other.
