Kenorland
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kenorland.bsky.social
Kenorland
@kenorland.bsky.social
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Geoscientist ⚒️
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drnereide.bsky.social
3/3
Mammatus clouds are usually formed in association with large cumulonimbus clouds. They typically develop on the underside of a thunderstorm's anvil.

Further reading➡️ weather.metoffice.gov.uk/learn-about/...

🧪 #Climatology #Meteorology #climatescience #AtmosphericPhysics #naturephotography
Mammatus clouds
Mammatus clouds are some of the most unusual and distinctive clouds formations with a series of bulges or pouches emerging from the base of a cloud.
weather.metoffice.gov.uk
May 11, 2025 at 10:06 PM
Reposted by Kenorland
obialik.bsky.social
There are a few ways to visualize the effect of earthquakes, but none are as vivid as Synthetic Aperture Radar interferometry (inSAR). Each fringe corresponds to a displacement of half a wavelength (e.g., 2.9 cm for the C-band radar). 🧪⚒️

Link: www.tandfonline.com/doi/full/10....
Interferograms of Central Italy detect fringe anomalies due to the earthquake of August 2016. The results derive from: (a) descending Sentinel-1 pair acquired on 21 and 27 August; (b) ascending Sentinel-1 pair acquired on 22 and 28 August.
May 11, 2025 at 7:27 AM
Reposted by Kenorland
obialik.bsky.social
One of mine, I don't think I highlighted here.
What does a storm do hundreds of meters down the slope?
A fair bit, if it generates downslope flows, these can fill burrows and alter exchanges between the sediment and water. 🧪⚒️🌊

Link: www.sciencedirect.com/science/arti...
Conceptual model for the sedimentary response to the storm event. The general configuration of the slope and modes of transport (a). In the condition before the event (b) the sediment is well ventilated with open macroporosity functioning as conduits. During and immediately after the storm hyperpycnal flow either remove material (c) or fills the macroporosity and interacts with the sediment the SWI (d). In the aftermath (e) the sediment in capped by the deposited event layer the prior conduits are plugged, limiting exchange and pushing the NOx and Fe2+profile up.
May 8, 2025 at 6:09 AM
Reposted by Kenorland
erictopol.bsky.social
Now the discovery of the 4th gene variant which promotes short sleep (4-6 hours) with full restfulness, potentially a path to a drug for sleep efficiency someday
www.pnas.org/doi/10.1073/...
The SIK3-N783Y mutation is associated with the human natural short sleep trait | PNAS
Sleep is an essential component of our daily life. A mutation in human salt induced kinase 3 (hSIK3), which is critical for regulating sleep durati...
www.pnas.org
May 5, 2025 at 8:08 PM
Reposted by Kenorland
chanda.blacksky.app
American science's favorite myth, that it's apolitical, is actually CIA propaganda! There's a whole book about it, which I reviewed for @physicstoday.bsky.social back when they still did book reviews! 🧪 #BookSky

pubs.aip.org/physicstoday...

So anyway this prof is susceptible to propaganda lol
May 3, 2025 at 11:53 AM
Reposted by Kenorland
paul-bierman.bsky.social
Speaking about my new book about Greenland and climate change at Gilman School in Baltimore. When the Ice is Gone. 40% off on Amazon today.

wwnorton.com/books/978132...

www.nytimes.com/2024/08/21/s...
Under a Frozen Army Base, He Found Incredible Fossils (Gift Article)
In a new book, geologist Paul Bierman recounts the moment he found astonishing evidence that Greenland’s ice sheet had melted in the ancient past.
www.nytimes.com
May 3, 2025 at 11:49 AM
Reposted by Kenorland
hugbox.bsky.social
Even when I try to write about fascism I write about plants
A four panel comic about human and plant time scales
May 3, 2025 at 12:03 AM
Reposted by Kenorland
obialik.bsky.social
Evolutionary tradeoffs are fascinating and tell us a lot about the conditions under which organisms evolved. For example, humans heal more slowly than non-human primates, and that has to do with trading fur for sweat glands. 🧪⚒️
royalsocietypublishing.org/doi/10.1098/...
Comparison of wound-healing distances among primates. Each dot represents the mean of two independent measurements. The regression line for each species is shown. One point lying out of this graph (at y = 4.54 cm) is indicated using a vertical arrow.
May 2, 2025 at 7:15 AM
Reposted by Kenorland
drwendyrocks.bsky.social
This animation from @earthscope.org uses real seismic data to show how the earthquake waves from the magnitude 7.4 earthquake in the Drake passage were detected by seismic stations in North America. 🧪
May 2, 2025 at 5:22 PM
Reposted by Kenorland
pavementgeology.bsky.social
Lovely sections through the alga Solenopora portlandica on the Wilkins Terrace at #UCL in Bloomsbury, London. This is a patch reef facies in the Upper Jurassic Portland Stone. #urbangeology
A block of Portland Stone crowded with fossils. These include oysters and other bivalves plus clumps of cauliflower-shaped Solenopora. These include latter show growth bands. Another block of Portland Stone crowded with fossils. These include oysters and other bivalves plus clumps of cauliflower-shaped Solenopora. These include latter show growth bands. A close up of a clump of fossils of the alga Solenopora showing concentric growth rings. A more distant view of a block of Portland Stone crowded with fossils. These include oysters and other bivalves plus clumps of cauliflower-shaped Solenopora. These include latter show growth bands.
May 2, 2025 at 5:49 PM
Reposted by Kenorland
geologyjohnson.bsky.social
Please enjoy this tiny delta from #Saltburn beach. #geology
Photo of beach sands showing ripples. There is also a small delta of sand formed where water is running down from a raised area of the beach. At the bottom is part of a human foot wearing a bright blue trainer. The image is about 1m wide.
May 2, 2025 at 4:31 PM
Reposted by Kenorland
moreorloess.bsky.social
One more bare soil image from April, 2025. Ice berg scours on the former bed of Glacial Lake Agassiz. Manitoba, just north of Pembina, North Dakota (these are well-known features but I can't immediately find a non-paywalled reference on them). Sentinel 2 image.
A satellite image of agricultural land with bare soil. Linear features extending several kilometers or more are visible; these are interpreted as ice berg scours.
May 1, 2025 at 11:50 PM
Reposted by Kenorland
mcnees.bsky.social
James Van Allen announced the discovery of radiation belts surrounding the Earth #OTD in 1958.

Random: When I was a kid we had a picnic table that Van Allen helped build. His name was carved on the bottom with a wood-burning tool.

Image: NASA
physics.uiowa.edu/about/james-...
A graphic showing the structure of the various radiation belts around the Earth. The Earth is at the center, surrounded by nested donut-shapes representing the different belts. The front half of the donut is cut away so the cross section can be seen. Black and white photo of James Van Allen overseeing the launch of a high altitude ballon carrying scientific equipment. He is wearing a jacket and a cap, and holding a camera
May 1, 2025 at 8:03 PM
Reposted by Kenorland
wegeekgirls.bsky.social
34 years ago today, 'Dinosaurs' premiered on ABC. (April 26, 1991) 🦖🦕

Created by Michael Jacobs and Bob Young.

Voice cast: Stuart Pankin, Jessica Walter, Jason Willinger Sally Struthers, Kevin Clash, Florence Stanley, Sam McMurray, & Sherman Hensley.

[📽 via The Jim Henson Company] #OTD #OnThisDay
April 26, 2025 at 12:50 PM
Reposted by Kenorland
erictopol.bsky.social
My op-ed in print @nytimes.com today on science of aging
gift link: www.nytimes.com/2025/04/21/o...
April 25, 2025 at 10:43 PM
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erictopol.bsky.social
Health metrics in France vs US

www.economist.com/europe/2025/...
April 24, 2025 at 4:19 PM
Reposted by Kenorland
geologytime.bsky.social
Amazing Vanadinite, Midelt, Draa Tafilalet region Morocco.

Photo: Mostapha Yahya Yassi

#minerals #crystals
April 22, 2025 at 5:03 PM
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oregonthedm.bsky.social
April 23, 2025 at 5:20 AM
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paleojim.bsky.social
Our guidebook for the Mancos Group RM GSA Fieldtrip next month has been published on line:
giw.utahgeology.org/giw/index.ph...
Really pleased at the resulting publication. Lots of research remains to be done on the marine Cretaceos of Utah. @paleontologizing.bsky.social @utahpaleo-ufop.bsky.social
April 22, 2025 at 5:27 PM
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cj-mock.bsky.social
Thinking a little bit about William Redfield and this great contributions to hurricanes in the early-mid 19th century.
April 20, 2025 at 5:01 PM
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zzsylvester.bsky.social
Yesterday I got a tour of the eXperimental Earth Scape facility, also known as Jurassic Tank, at St. Anthony Falls Laboratory. Even though the tank has not been used since 2015, a lot of the data from it is available and it is an important piece in the history of sedimentary geoscience
A sediment slice through sand that was deposited in the tank during one of the experiments. Normal faulting developed in alternating layers of dark- and light-colored sediment The original mini-tank, designed and built by Jim Mullin, that was used to test and demonstrate how removing gravel could be used to generate arbitrary subsidence patterns Another detail of a beautiful sediment slice Under the tank you can see the tubes that were used to transport the gravel to create the desired subsidence patterns
April 19, 2025 at 2:35 PM
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geologyjohnson.bsky.social
#Strataday Panorama photo, interpretive sketch, and graphic log of the middle Jurassic Saltwick Formation at West Cliff, Whitby, N Yorks, UK. The channel in this outcrop is spectacular in person, especially in the early morning light. #Geology
Top row, photograph of a cliff of yellow sandstone part covered in grass. There are different shades of yellow and grey which form lens shaped channel structures. Bottom row, left, A line drawn graphic log showing the grain size and sedimentary structures found in the sandstone cliff. Symbols indicate where plant fossils, root traces, clams, and dinosaur footprints are found. Bottom row, right, interpretive sketch of the cliff showing how ancient rivers eroded down into the underlying sandstone layers. Two vertical black bars represent where fossil tree trunks are found.
April 19, 2025 at 5:09 PM
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seedavigo.bsky.social
New cuntimal just dropped
April 18, 2025 at 12:59 AM
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emilycurates.bsky.social
We love Bluesky don’t we?
April 19, 2025 at 6:55 PM