Welcome to DU! The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards. Join the community: Create a free account Support DU (and get rid of ads!): Become a Star Member Latest Breaking News Editorials & Other Articles General Discussion The DU Lounge All Forums Issue Forums Culture Forums Alliance Forums Region Forums Support Forums Help & Search

nitpicked

(1,209 posts)
Mon May 19, 2025, 02:28 PM May 19

14,000 years ago, the most powerful solar storm ever recorded hit Earth. 'This event establishes a new worst-case scenar

https://www.space.com/astronomy/sun/14-000-years-ago-the-most-powerful-solar-storm-ever-recorded-hit-earth-this-event-establishes-a-new-worst-case-scenario

14,000 years ago, the most powerful solar storm ever recorded hit Earth. 'This event establishes a new worst-case scenario'

New SOCOL:14C-Ex model reveals that the Late-Glacial radiocarbon spike in 12350 BC was caused by the record-strong extreme solar storm

The solar storm, the only known to have taken place in the last Ice Age, long eluded scientists as they lacked appropriate models for interpreting radiocarbon data from glacial climate conditions.

But a new study by a team from the Oulu University in Finland has taken a stab at the measurement interpretation with eye-opening results. Using a novel chemistry-climate model, the team found that the marked spike in the carbon-14 isotope detected in fossilized tree rings was caused by a solar storm more than 500 times as powerful as the 2003 Halloween Solar Storm, which was the most intense in modern history.
(snip)

In 2023, a major spike in radiocarbon concentrations in fossilized tree rings was discovered, indicating a major solar storm must have taken place as the last ice age was drawing to an end.
(snip)

Scientists previously studied records of five other radiocarbon spikes found in tree ring data, which they attributed to powerful solar storms that had taken place in 994 AD, 775 AD, 663 BC, 5259 BC and 7176 BC.
(snip)




4 replies = new reply since forum marked as read
Highlight: NoneDon't highlight anything 5 newestHighlight 5 most recent replies
14,000 years ago, the most powerful solar storm ever recorded hit Earth. 'This event establishes a new worst-case scenar (Original Post) nitpicked May 19 OP
New SOCOL:14C-Ex model reveals that the Late-Glacial radiocarbon spike in 12350 BC was caused by the record-strong extre nitpicked May 19 #1
Thanks - I look forward to reading more. erronis May 19 #2
my goof nitpicked May 19 #3
It is hard enough to juggle posts/citations without contractors doing their stuff! erronis May 19 #4

nitpicked

(1,209 posts)
1. New SOCOL:14C-Ex model reveals that the Late-Glacial radiocarbon spike in 12350 BC was caused by the record-strong extre
Mon May 19, 2025, 02:35 PM
May 19
https://www.sciencedirect.com/science/article/pii/S0012821X25001827?via%3Dihub#br0020

The Sun rarely produced extreme solar particle events (ESPEs), orders of magnitude stronger than everything directly observed. Their enormous power can greatly distort the production of cosmogenic isotopes, e.g., radiocarbon 14C, in the terrestrial system, leaving clear signatures in natural terrestrial archives including dateable tree rings. Eight such events were known to occur during the past 12 millennia of the Holocene, with the strongest one being that of 775 AD. Recently, a new and the only ESPE candidate beyond the Holocene has been discovered as the largest known 14C peak dated to ca. 12350 BC, nearly twice as big as that of 775 AD. However, it could not be analysed earlier due to the lack of appropriate models applicable to glacial climate conditions. We have developed a brand-new state-of-the-art chemistry-climate model SOCOL:14C-Ex to study fast changes in 14C. It was tested on the well-studied event of 775 AD and applied to the ESPE of 12350 BC. We found that it was stronger by 18±11% than by 775 AD and likely occurred between January – April 12350 BC with the most probable date in early March. This makes the ESPE of 12350 BC the record strongest known event, pushing the bounds of the extreme solar-terrestrial events even further, forming the new worst-case scenario paradigm and providing the global tie point for dendrochronological dating before the Holocene. The newly developed model lifts the existing limitation to the Holocene and extends our ability to analyse radiocarbon data even for glacial climate conditions.
(snip)



erronis

(19,848 posts)
2. Thanks - I look forward to reading more.
Mon May 19, 2025, 02:46 PM
May 19

I can't seem to match your extracts to the text on the cited reference. Is this as reworded by you, or another reference?

Not nitpicking!

nitpicked

(1,209 posts)
3. my goof
Mon May 19, 2025, 02:56 PM
May 19

I THINK I have the links and text straightened out now.

((what contractors in and out of the house will do to one's two gray cells...))

erronis

(19,848 posts)
4. It is hard enough to juggle posts/citations without contractors doing their stuff!
Mon May 19, 2025, 03:12 PM
May 19

Thanks for letting me know I haven't finally lost it all!

Latest Discussions»Culture Forums»Science»14,000 years ago, the mos...