A question was raised asking what a polar reverse is. Mariner has written about the phenomenon in previous posts:
Yes, Virginia, one day Santa may have to move to Antarctica
Posted on February 24, 2021
Mariner has written recently about Earth’s polar magnetic field currently flipping erratically in the Bering Sea and the southern Atlantic. The following summary is copied from the February 2021 Science Magazine:
Kauri trees mark magnetic flip 42,000 years ago
By Paul Voosen
Using a remarkable record from a 42,000-year-old kauri tree preserved in a bog, researchers have pieced together a record of the last time Earth’s protective magnetic field weakened and its poles flipped—known as the Laschamp excursion—exposing the world to a bombardment of cosmic rays and, the team suggests, briefly shifting Earth’s climate. The record shows the field nearly failed prior to its brief swap, which only lasted 500 years. Combined with an unusually quiet Sun that is believed to have occurred during this time, cosmic rays could have caused a notable drop in stratospheric ozone, shifting wind flows and climate patterns, they suggest.
For those curious why the magnetic field flips, it is caused by the Earth’s iron core rotating at a different speed than surface layers of the planet. Eventually what can be represented as static electricity disrupts the magnetic balance – just like lightning or touching something while walking in your socks across the rug. Unlike the instantaneousness of lightning or socks, the mass of the entire Earth acts like a capacitor, slowing the change to hundreds, perhaps thousands of years.
֎ It was just in the news that the Mississippi River is running shallow. Already it holds up the huge barges that carry Midwest grains to manufacturers. Add to this the failing cattle grain farms in the southwest and one can assume buying grain products and beef at the market may well run up credit card debt. Perhaps anchovies, scrapple and spam may become popular again.