Jan 31, 2025
01-31-25 | Earth from a NASA observatory. via mark. misterlemonztenth.tumblr.com/archive
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01-31-25 | Earth from a NASA observatory. via mark. misterlemonztenth.tumblr.com/archive
Despite flying in low-visibility night-time conditions, bats can fly to an altitude of over 5,000 ft. The flying mammals use their large wings to surf on air currents, which sweep upwards as they hit hills or slopes. – WTF Fun Facts
Source: Bats soar to heights of 1600 metres by riding late night winds | New Scientist
“Up where the air is clear”
Art Nouveau vase by Stephanie Young of Calmwater Designs
The world isn’t in the best condition because of the coronavirus pandemic, but at least there’s a glimmer of good news coming from the scientific community regarding the ozone layer. Scientists have confirmed in a study published March 25th, 2020, that the changes in the jet stream – the rapid...
“Ventilation, window open.” Advanced lessons in physiology and hygiene. 1895.
Why is this island smoking?
This image was captured by the Suomi NPP satellite and shows a place north of the Arctic Circle (76° North) known as Bennett Island. As you can see, it’s smoking.
This island is something of a marvel for that reason. It’s not emissions from an active volcano and to the best of most people’s knowledge the island isn’t inhabited. Yet, for decades, these plumes and clouds have been recognized as appearing from the island.
A couple other ideas were proposed; that the plume was methane, seeping up from the Arctic Ocean floor, or the plume was caused by some sort of secret military operations on the island during the cold war.
The answer is less exciting than that, or at least it might seem that way to anyone other than atmospheric scientists. An expedition in the early 1990’s found that the island is causing a series of orographic clouds to form as a consequence of its height through a fairly unique but well-understood process.
The island itself is only a few hundred meters above sea level but it is causing clouds to form at a height of several thousand meters. These clouds form when the atmosphere is quite stable in the region and there is a prevailing wind direction. To get over the island, wind currents have to move upwards by several hundred meters when they run into it.
As a consequence, every layer of the atmosphere above the island is disturbed; the lower levels push the air levels above them upwards until eventually there is a disruption at a level where clouds can form.
When moist air in the atmosphere above this island is pushed upwards by that small amount, it cools off slightly and moves to slightly lower pressure…just enough of a change to cause the formation of clouds if there is enough water in the atmosphere.
So this phenomenon, like most cloud layers, isn’t anything nefarious, it’s a consequence of the correct set of atmospheric conditions.
-JBB
Image credit: NASA/EO earthobservatory.nasa.gov/IOTD/view.php?id=82213
Read more http://www.lbl.gov/Science-Articles/Archive/arctic-plume.explored.html
Fanny Devito
A transforming swarm via sacred geometry.
Art Nouveau vase by Stephanie Young
