I'd rather go with the Wikipedia entryâdespite a lot of wailing about it, on topics such as these, wikipedia tends to be a good summation of current thought.
And who do you think is editing Wikipedia articles? - The net (once again) seems to have been scraped of all the info available about this just a few years ago.
Could NASA be deliberately hiding important information, due to their own, strong dependence on political factions? If you care to read further into the study's abstract and compare that to the NASA article, you might just find some.
P.S. - Sorry, I misspelled NASA is a "natural authority" when meaning to say a "US national authority".
I'd rather go with the Wikipedia entryâdespite a lot of wailing about it, on topics such as these, wikipedia tends to be a good summation of current thought.
It's all buzzing sounds to me, but I've casually read about this phenomenon several times and there was never any sense of alarm, that I can recall.
Could NASA be deliberately hiding important information, due to their own, strong dependence on political factions? If you care to read further into the study's abstract and compare that to the NASA article, you might just find some.
P.S. - Sorry, I misspelled NASA is a "natural authority" when meaning to say a "US national authority".
Thanks, and accepted.
PLUS, who are CNN, anyway, lol. From their cited study:
We use ancient New Zealand kauri trees (Agathis australis) to develop a detailed record of atmospheric radiocarbon levels across the Laschamps Excursion. We precisely characterize the geomagnetic reversal and perform global chemistry-climate modeling and detailed radiocarbon dating of paleoenvironmental records to investigate impacts. We find that geomagnetic field minima ~42 ka, in combination with Grand Solar Minima, caused substantial changes in atmospheric ozone concentration and circulation, driving synchronous global climate shifts that caused major environmental changes, extinction events, and transformations in the archaeological record.
While NASA is a natural authority doesn't always make them right at any event, me thinks. But who are we to navigate a jungle of scientific studies?
It's all buzzing sounds to me, but I've casually read about this phenomenon several times and there was never any sense of alarm, that I can recall.
Thanks, and accepted.
PLUS, who are CNN, anyway, lol. From their cited study:
We use ancient New Zealand kauri trees (Agathis australis) to develop a detailed record of atmospheric radiocarbon levels across the Laschamps Excursion. We precisely characterize the geomagnetic reversal and perform global chemistry-climate modeling and detailed radiocarbon dating of paleoenvironmental records to investigate impacts. We find that geomagnetic field minima ~42 ka, in combination with Grand Solar Minima, caused substantial changes in atmospheric ozone concentration and circulation, driving synchronous global climate shifts that caused major environmental changes, extinction events, and transformations in the archaeological record.
While NASA is a US national authority doesn't always make them right at any event, me thinks. But who are we to navigate a jungle of scientific studies?
Recent measurements by NASA's Solar Dynamic Observatory reveal a rapid weakening of magnetic fields in the polar regions of the sun. North and south magnetic poles are on the verge of disappearing. This will lead to a complete reversal of the sun's global magnetic field perhaps before
the end of the year.
An artist's concept of the sun's dipolar magnetic field. Credit: NSF/AURA/NSO.
If this were happening on Earth, there were be widespread alarm. Past reversals of our planet's magnetic field have been linked to calamities ranging from sudden climate change to the extinction of Neanderthals. On the sun, it's not so bad.
"In fact, it's routine," says Todd Hoeksema, a solar physicist at Stanford University. "This happens every 11 years (more or less) when we're on the verge of Solar Maximum."
Vanishing poles and magnetic reversals have been observed around the peak of every single solar cycle since astronomers learned to measure magnetic fields on the sun. Hoeksema is the director of Stanford's Wilcox Solar Observatory (WSO), that is observing its fifth reversal since 1980.
The last five polar field reversals observed at the Wilcox Solar Observatory (inset)
"One thing we have learned from these decades of data is that no two polar field reversals are alike," he says.
Sometimes the transition is swift, taking only a few months for the poles to vanish and reappear on opposite ends of the sun. Sometimes it takes years, leaving the sun without magnetic poles for an extended period of time.
"Even more strange," says Hoeksema, "sometimes one pole switches before the other, leaving both poles with the same polarity for a while."
Indeed, such a scenario could be playing out now. The sun's south magnetic pole has almost completely vanished, but the north magnetic pole is still hanging on, albeit barely.
How does all this effect us on Earth? One way we feel solar field reversals is via the heliospheric current sheet:
An artist's concept of the heliospheric current sheet.
The sun is surrounded by a wavy ring of electricity that the solar wind pulls and stretches all the way out to the edge of the Solar System. This structure is a part of the sun's magnetosphere. During field reversals, the current sheet becomes extra wavy and highly tilted. As the sun spins, we dip in and out of the steepening undulations. Passages from one side to another can cause geomagnetic storms and auroras.
Most of all, the vanishing of the poles means we're on the verge of Solar Maximum. Solar Cycle 25 is shaping up to be stronger than forecasters expected, and its peak could be relatively intense.
Indiaâs Chandrayaan-3 mission had to do one incredibly difficult thing: touch down on the moon. When it did, the cheers at mission control in Bengalaru could be heard in Washington and Beijing, Moscow and Tokyo, and on 8 million video screens, where coverage of the landing was streamed live on YouTube by the Indian Space Research OrganizationâISRO for short.
yes, but they desperately need to work on their special effects videos.
Indiaâs Chandrayaan-3 mission had to do one incredibly difficult thing: touch down on the moon. When it did, the cheers at mission control in Bengalaru could be heard in Washington and Beijing, Moscow and Tokyo, and on 8 million video screens, where coverage of the landing was streamed live on YouTube by the Indian Space Research OrganizationâISRO for short.
Last
month, the spacecraft - exploring the universe since 1977 - tilted its
antenna to point two degrees away from Earth after the mistake was made. As a result, the probe has stopped receiving commands or sending data.
This why most space crafts crash when they set measurements in Standard but transmit it as metric.
