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Coe is an emeritus professor of geophysics, and has had a long and distinguished career. He has received numerous awards and recognition for his many research accomplishments. He received his Ph.D. at the University of California, Berkeley, and did postgraduate work in Australia before returning to the States where he joined the UC Santa Cruz faculty in 1968. He has made significant contributions in a number of areas, including volcanology, geochemistry, and tectonics. In the 1970s, he developed a method of more accurately measuring the intensity of the magnetic field in rocks – a method that bears his name. Perhaps his most significant contribution, however, has been in paleomagnetism, where he has been a pioneer in the study of magnetic field reversals. “The Earth’s magnetic field is restless,” said Coe in a recent interview.
The Earth continuously receives 3,700 billion watts of power through the transfer of the gravitational and rotational energy of the Earth-Moon-Sun system, and over 1,000 billion watts is thought to be available to bring about this type of motion in the outer core. This energy is enough to generate the Earth's magnetic field, which together with the Moon, resolves the major paradox in the classical theory.
originally posted by: Flyingclaydisk
Kinda pours a bucket of ice water on the whole 'manmade" global warming thing if true, doesn't it?
originally posted by: KansasGirl
a reply to: SeaWorthy
So the tree grew 42,000 years ago, and shows it living through the magnetic flip (or whatever), but you're saying the last reversal was 780,000 years ago. There's some incorrect math there...
The lifespan of the kauri tree covers a point in Earth's history when the magnetic field almost reversed. At this time, the magnetic north and south went on an excursion but did not quite complete a full reversal.
originally posted by: DeathSlayer
a reply to: SeaWorthy
I am not a scientist but I recall planes having to make computer adjustments every time when landing due to the pole shifts and they still have this issue as of today.
Runways are designated according to the points on a compass, and the drifting magnetic north means that they, periodically, need to be renamed. "Recently, the drift has caused our runways' orientations to be closer to the next increment on the magnetic compass," Tampa International Airport spokeswoman Brenda Geoghagan
originally posted by: Flyingclaydisk
Kinda pours a bucket of ice water on the whole 'manmade" global warming thing if true, doesn't it?
originally posted by: Soylent Green Is People
originally posted by: KansasGirl
a reply to: SeaWorthy
So the tree grew 42,000 years ago, and shows it living through the magnetic flip (or whatever), but you're saying the last reversal was 780,000 years ago. There's some incorrect math there...
From the article:
The lifespan of the kauri tree covers a point in Earth's history when the magnetic field almost reversed. At this time, the magnetic north and south went on an excursion but did not quite complete a full reversal.
So it witnessed an "almost" reversal 42,000-ish years ago.
That doesn't quite jibe with the more definitive language in the title of the article Ancient Tree With Record of Earth's Magnetic Field Reversal in Its Rings Discovered, but maybe they consider a partial reversal to be a reversal [shrugs].
Called a “geomagnetic field reversal,” this has resulted in the poles swapping positions, with magnetic north becoming magnetic south, and vice versa. The magnetic pole has also undergone what are called “excursions.” During an excursion event, the earth’s magnetic field weakens and begins to drift but does not reverse itself.
During the past 100 million years, the reversal rates vary considerably. Consecutive reversals were spaced 5 thousand years to 50 million years. The last time the magnetic field reversed was about 750,000 - 780,000 years ago. While we now appear to be in a period of declining magnetic field strength, we cannot state for certain if or when a magnetic reversal will occur.
originally posted by: Wayfarer
originally posted by: Flyingclaydisk
Kinda pours a bucket of ice water on the whole 'manmade" global warming thing if true, doesn't it?
Oh yeah, and coincidentally also solves Roswell and the Kennedy assassination! Good Find
Will a reversal of the magnetic field affect animal behavior? Many migratory animals use the geomagnetic field to orient themselves. However, the mechanism underlying this ability of animals remains unknown. Experiments show that migratory birds can sense the declination and inclination of the local geomagnetic field.
Changing the polarity of the horizontal magnetic field is known to affect the hanging position ofbats. Some migrating butterflies use the geomagnetic field for direction. In the ocean,spiny lobsters, dolphins, and whalesare known to use geomagnetic field for directions. It is thus, possible that a reversal of geomagnetic field affect the migratory behavior of some animals. Since the chance of a reversal in the near future (in the next few hundred years) is very low, no immediate concern is required.
But the 2018 Western Monarch Thanksgiving Count found that the number of west-coast monarchs spending the winter in California had plunged to only 20,456 butterflies—a drop of 86 percent since last year. And the number of eastern monarchs overwintering in Mexico this year has dropped 15 percent since last year, for a total decline of more than 80 percent over the past 20 years, according to the National Wildlife Federation.
It’s never good news when birds – or any other animals for that matter – fall from the sky … dead or alive. Get ready for some bad news from Draper, Utah, and Rome, Italy, where hundreds of dead starlings covered the ground recently. Pollution? End times? Something worse?
That now seems doubtful. And scientists predict that the once common little brown bat (Myotis lucifugus), will be reduced to just 1% of its pre-WNS population numbers by 2030.
The lobster industry in New York and southern New England has nearly collapsed. From 1996 to 2014, New York’s registered lobster landings dropped 97.7%—from 9.4 million pounds in 1996 (the state’s most profitable year) to 215,980 pounds in 2014 (the latest data available). The story is much the same in Connecticut, where landings fell 96.6% from the most profitable year, and in Rhode Island, which saw a 70.3% drop from its most profitable year.
So many gray whales are dying off the U.S. West Coast that scientists and volunteers dealing with the putrid carcasses have an urgent request for coastal residents: Lend us your private beaches so these ocean giants can rot in peace.
T
he whales that have washed up this year are emaciated, and scientists have also noted that whales migrating north are showing up in places they wouldn't normally venture, such as the Ports of Los Angeles and Long Beach, California, or San Francisco Bay.
Ants and bees use the geomagnetic field to orient and navigate in areas around their nests and along migratory paths. Bees show sensitivity to small changes in magnetic fields in conditioning experiments and when exiting the hive. For the first time, the magnetic properties of the nanoparticles found in eusocial insects
Federal agencies failed to follow the law in protecting the habitat of an endangered bumblebee that continues to be found in Illinois despite major population loss nationwide,
Over the last year, American beekeepers reported losing about 41% of their honeybee colonies, a 3% increase in the loss recorded in the same period for 2017, according to new data released this week by the University of Maryland, which works in conjunction with the Bee
Remember the changes they had to make recently to the airport runways?
originally posted by: ignorant_ape
a reply to: SeaWorthy
Remember the changes they had to make recently to the airport runways?
just for context - remind us
bear in mind - runway markings - are rounded to " nearest 10 degrees " ie 274 degrees is marked as 27
and most important - when was the last update to runway markings at the site ?
i hace a book detailing " the wwii eara RAF establishments in the UK " . and its interesting to compare 1940s runway designations - with the current ones [ at places where the RAF still operate - or have been turned over to commercial // recreational aviation ]
bottom line - the upgrades to runway markings - has been miss-understood and over hyped by doom poor munkies
Earth's north magnetic pole is so out of whack that scientists need to update the global magnetic-field model they released only four years ago. Could that be a sign that the magnetic pole will flip soon?
The magnetic pole is moving erratically out of the Canadian Arctic and toward Siberia so unpredictably that it took scientists by surprise. That 2015 update was supposed to remain valid until 2020, Arnaud Chulliat, a geomagnetist at the University of Colorado Boulder and the National Oceanic and Atmospheric Administration's (NOAA) National Centers for Environmental Information, told Nature.
originally posted by: oldcarpy
a reply to: Oldtimer2
Leaving aside for the moment the other doom stuff that you mention, you say the magnetosphere is "out of control"? In what way? Do you have any evidence for this?
The solar wind drags out the night-side magnetosphere to possibly 1000 times Earth's radius; its exact length is not known. This extension of the magnetosphere is known as the Magnetotail. The outer boundary of Earth's confined geomagnetic field is called the Magnetopause. The Earth's magnetosphere is a highly dynamic structure that responds dramatically to solar variations.
Earth's Magnetic Field Is Weakening 10 Times Faster Now. ... Earth's magnetic field, which protects the planet from huge blasts of deadly solar radiation, has been weakening over the past six months, according to data collected by a European Space Agency (ESA) satellite array called Swarm.Jul 8, 2014
The region that concerns scientists the most at the moment is called the South Atlantic Anomaly – a huge expanse of the field stretching from Chile to Zimbabwe. The field is so weak within the anomaly that it's hazardous for Earth's satellites to enter it, because the additional radiation it's letting through could disrupt their electronics.
That day, seismographs all over the world registered a very low-frequency tremor, a strange grumble that lasted for around 30 minutes. One segment of the signal also featured several high-frequency blips, each separated by roughly a minute of time, a bit like a regular, ticking clock. Stephen Hicks, a seismologist at the University of Southampton, highlighted the phenomenon in a November 12 tweet. “Something biggggg, yet strangely slow, sent seismic rumblings around the surface of much of the planet yesterday,” he wrote. Today, that succinct summary still holds, even as discussion of the event continues between geoscientists of all kinds over on Twitter.
MORE Earth's Magnetic Field Can Reverse Poles Ridiculously Quickly, Study Suggests Solar radiation constantly bombards Earth, and Earth’s magnetic field repels it. According to a new study, our planet’s protective shield might weaken far more quickly and unpredictably than scientists previously thought. Credit: NASA / Marshall Space Flight Center Like the invisible force shield around the Death Star, Earth's magnetic field surrounds and protects our planet from the hottest, most statically charged particles the sun can throw our way.
This shield — the natural product of molten iron swirling around the planet's core — has had our backs for billions of years, and prevented Earth from becoming an irradiated, electrified wasteland. Every now and then, though, that shield lets down its guard. A few times every million years or so, Earth's magnetic field reverses polarity. Imagine a giant bar magnet inside our planet got flipped upside down; iron molecules in Earth's outer core would switch direction, the magnetic North Pole would become the magnetic South Pole, and the invisible currents of energy that make up our planet's magnetic armor would tangle and break, potentially reducing the shield's protective strength by up to 90 percent, previous studied have suggested. [6 Visions of Earth's Core] Luckily, full reversals are uncommon and unfold slowly over thousands of years. (The last full reversal occurred about 780,000 years ago.)
But according to a new study published Monday (Aug. 20) in the journal Proceedings of the National Academy of Sciences, partial or temporary shifts in Earth's magnetic poles can occur much, much faster than was previously thought possible — potentially, within a single human lifetime. In the new study, an international team of scientists analyzed 16,000 years of geomagnetic history coded into the atoms of an ancient stalagmite in China.
This story written in stone told them that once, about 98,000 years ago, the planet's magnetic field suddenly flipped polarity in as little as 100 years — roughly 30 times faster than the generally expected rate, and 10 times faster than what was thought to be the fastest rate possible.