Posted on 02/19/2021 10:57:44 AM PST by tired&retired
Nearly 42,000 years ago, when Earth’s magnetic fields reversed, this triggered major environmental changes, extinction events, and long-term changes in human behavior, a new study reports.
The findings, made possible by a new radiocarbon record derived from New Zealand’s ancient kauri trees, raise important questions about the evolutionary impacts of geomagnetic reversals and excursions throughout the deeper geological record, the authors say.
“Before this work,” says author Chris Turney in a related video, “we knew there were a lot of things happening around the world at 42,000 years ago, but we didn’t know precisely how… For the first time, we’ve been able to precisely date what happened when Earth’s magnetic fields last flipped.”
Written in the geological record are numerous instances where the planet’s magnetic poles flipped. Today, such an event would almost certainly wreak havoc with modern electronic and satellite technologies. However, the potential environmental impacts of such events are virtually unknown.
The most recent major magnetic inversion, the Laschamps excursion, a relatively short-lived geomagnetic event that occurred ~41,000 years ago, provides one of the best opportunities to study the potential impacts of extreme changes to Earth’s magnetic field. However, despite compelling evidence from several paleoenvironmental records that suggest it coincided with significant environmental and ecological changes, the ability to precisely characterize this event and determine its role — if any — in contemporaneous global changes has been limited by an uncertain radiocarbon calibration for the period.
“And as it is appointed unto men once to die, but after this the judgment:”- Hebrews 9:27
Yup
The real cause of climate change.
No doubt man made field reversal!
Evil Trump’s fault!
This is an account of Alaric sac of Rome 411 AD before and after the sac of Rome. Notice how he was always in need of food. Same with the Romans they where in dire need of food.
He was only in Rome for 3 days. Sacked a couple of towns then with the word of food across the Mediterranean they took off with most of them that died on the trip.
https://dokumen.pub/a-history-of-the-later-roman-empire-ad-284641-2ndnbsped.html
Hmm, so the warming made for more rats and thus rat fleas? Wasn’t diminished crops growing? Will read link later, thanks.
This topic was posted , thanks tired&retired. Combined ping, C and GGG lists.
I keep plenty of magnets on my refrigerator to protect my house! (AOC)
Swamp Sentinels: What We Can Learn From New Zealand's Ancient Kauri Trees
"Two Ancient Kauri Forests have been buried at this site by cataclysmic prehistoric events. Touch and feel these logs, some of which are over 100,000 years old!"
And in my shoe soles!
Hmmmm. See post 34 on that thread. My memory is gone...gone.
My memomry’s going fast, but hell, I wasn’t using it for anything anyway...
Which came first, the chicken or the egg? How do they know it wasn't the other way around?..................
Because there's no causa-and-effect connection if it happened the other way around, IOW, it would have to be just a huge coincidence.
So are we about to have a flip soon. What is this 10 times faster rate anyway? If you look at the graph for climate over the last 400,000 years, you will notice a sharp drop around 75k years ago. That was caused by the great Toba volcanic eruption which left a crater about 18 miles wide and 65 miles long and created a nuclear winter that may have seriously shrunk the human population. I wonder how much harm a reversal would do?
THAT’s a potential issue.
Much worse than a relatively minor CAGW CO2 gain.
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