Aug 28, 2020 04:07 AM
(This post was last modified: Aug 28, 2020 10:26 PM by C C.)
Just how cold was the Ice Age? New study finds the temperature
https://bigthink.com/surprising-science/...emperature
EXCERPTS: How cold was the Ice Age? While one can imagine layers of ice covering everything around the world, that's not exactly what happened. In fact, researchers identified the temperature of the Last Glacial Maximum, from about 20,000 ago, to be about 46 degrees Fahrenheit (7.8 C). This, of course, was the average global temperature – not the extent of how cold it really got in some places.
The Last Glacial Maximum (LGM) was a very chilly period, when glaciers covered about half of North and South Americas, as well as Europe and parts of Asia. Overall, the new paper found that the world's temperatures were about 11 degrees Fahrenheit or 6 degrees Celsius less warm than today. If you're comparing, the average global temperature was 14 C (57 F) in the 20th century.
[...] The findings will help climate scientists evaluate how today's rising atmospheric levels of carbon dioxide influence the average temperatures around the world. (MORE - details)
How to Spot Elusive 'Jellyfish Sprites' Dancing in the Sky During a Thunderstorm
https://www.smithsonianmag.com/smart-new...180975677/
EXCERPTS: If you see a thunderstorm in the distance late at night, look at the sky above the clouds and watch closely. You might just glimpse a sprite. Sprites are a type of transient luminous event, like lightning, but fainter, faster and significantly larger [...] Stephen Hummel photographed a red jellyfish sprite from Texas’ Mount Locke. The bright red formation appears to float between 37 and 50 miles high in the atmosphere, with a dispersed red cap and a flurry of tentacles underneath.
"Sprites usually appear to the eye as very brief, dim, grey structures. You need to be looking for them to spot them, and oftentimes I am not certain I actually saw one until I check the camera footage to confirm," Hummel tells [...] He recorded four and a half hours of footage in order to photograph one sprite. "Overall I've probably recorded close to 70 hours' worth of footage and stills this year, and caught about 70 sprites.” Half of those appeared in one storm, he adds.
To see a jellyfish sprite, you need to be far away from the thunderstorm and watching it late at night in a place without much light pollution. Hummel spotted his sprite from about 100 miles away at 1:30 AM [...] The storm also needs to be making a lot of lightning. The Great Plains during the spring provides great opportunities to catch sprites, Matthew Cappucci wrote ... Thunderstorms’ electrical activity goes beyond their classic lightning bolts... (MORE - details)
Bright Jellyfish Red Sprites, Sprite Outbreak! May 23 2020
https://www.youtube-nocookie.com/embed/wTtUx74_B-A
https://bigthink.com/surprising-science/...emperature
EXCERPTS: How cold was the Ice Age? While one can imagine layers of ice covering everything around the world, that's not exactly what happened. In fact, researchers identified the temperature of the Last Glacial Maximum, from about 20,000 ago, to be about 46 degrees Fahrenheit (7.8 C). This, of course, was the average global temperature – not the extent of how cold it really got in some places.
The Last Glacial Maximum (LGM) was a very chilly period, when glaciers covered about half of North and South Americas, as well as Europe and parts of Asia. Overall, the new paper found that the world's temperatures were about 11 degrees Fahrenheit or 6 degrees Celsius less warm than today. If you're comparing, the average global temperature was 14 C (57 F) in the 20th century.
[...] The findings will help climate scientists evaluate how today's rising atmospheric levels of carbon dioxide influence the average temperatures around the world. (MORE - details)
How to Spot Elusive 'Jellyfish Sprites' Dancing in the Sky During a Thunderstorm
https://www.smithsonianmag.com/smart-new...180975677/
EXCERPTS: If you see a thunderstorm in the distance late at night, look at the sky above the clouds and watch closely. You might just glimpse a sprite. Sprites are a type of transient luminous event, like lightning, but fainter, faster and significantly larger [...] Stephen Hummel photographed a red jellyfish sprite from Texas’ Mount Locke. The bright red formation appears to float between 37 and 50 miles high in the atmosphere, with a dispersed red cap and a flurry of tentacles underneath.
"Sprites usually appear to the eye as very brief, dim, grey structures. You need to be looking for them to spot them, and oftentimes I am not certain I actually saw one until I check the camera footage to confirm," Hummel tells [...] He recorded four and a half hours of footage in order to photograph one sprite. "Overall I've probably recorded close to 70 hours' worth of footage and stills this year, and caught about 70 sprites.” Half of those appeared in one storm, he adds.
To see a jellyfish sprite, you need to be far away from the thunderstorm and watching it late at night in a place without much light pollution. Hummel spotted his sprite from about 100 miles away at 1:30 AM [...] The storm also needs to be making a lot of lightning. The Great Plains during the spring provides great opportunities to catch sprites, Matthew Cappucci wrote ... Thunderstorms’ electrical activity goes beyond their classic lightning bolts... (MORE - details)
Bright Jellyfish Red Sprites, Sprite Outbreak! May 23 2020