#nucleation — Public Fediverse posts

Making Bubbles in Magma

When bubbles form in magma deep below the earth, volcanic eruptions follow. Scientists believe this happens when decompression of the magma allows volatile compounds to come out of solution and form bubbles–just as opening a bottle of seltzer allows carbon dioxide to bubble out. But a new study indicates that decompression may not be the only source of bubbles.

The team found that supersaturated fluids can nucleate bubbles when they’re sheared–even without decompression. They demonstrated this in the lab, not with magma but with a low-temperature magma analog, seen above. The more saturated with volatiles the fluid is, the less shear is needed to trigger bubbles.

Viscous shear is everywhere for magma, so this bubble formation mechanism is likely common. Better understanding how and when bubbles form in magma directly affects predictions for eruptions–especially for determining whether they’re likely to be explosive or effusive. (Image credit: volcano – A. Bonnerdeaux, experiment – O. Roche et al.; research credit: O. Roche et al.; via Physics World)

▶️ #LabPlot tutorial: LabPlot Tutorial: Nucleation & Growth Rate Analysis. :boost_love:

@[email protected]
@opensource

The CN's Lab has published another video tutorial that shows how to analyze #nucleation and #growth mechanisms using LabPlot with #chronoamperometry data.

➡️ https://www.youtube.com/watch?v=Kj3BI5X-cyo

#FreeSoftware #DataAnalysis #DataViz #Research #OriginProAlternative #Science #Tutorial #FLOSS #FOSS #OpenSource #AlternativeTo #KDE #Researchers #MaterialsScience #Science #Nanomaterials #ScharifkerHills

Seeding Clouds With Wildfire

Raging wildfires send plumes of smoke up into the atmosphere; that smoke is made up of tiny particles that can serve as seeds — nucleation sites — where water vapor can freeze and form clouds. To understand wildfire’s effect on cloud growth, researchers sampled air from the troposphere (the atmosphere’s lowest layer) both in and around wildfire smoke.

The team found that smoke increased the number of nucleating particles up to 100 times higher than the background air, but the exact make-up of the smoke varied significantly by fire. Smoke particles were mostly organic, though inorganic ones appeared as well. The temperature of a fire, as well as what materials it was burning, made a big difference; the fire where they measured the highest particle concentrations included lots of unburned plant material, thought to be carried aloft by turbulence around the fire. (Image credit: K. Barry; research credit: K. Barry et al.; via Eos)

#cloudFormation #fluidDynamics #nucleation #physics #science #smoke #turbulence #wildfire

Plankton Generate a Cloudy Shield over the Antarctic
--
https://www.scientificamerican.com/article/plankton-generate-a-cloudy-shield-over-the-antarctic/ <-- shared technical article
--
https://doi.org/10.5194/acp-23-1677-2023 <-- shared paper
--
#GIS #spatial #mapping #watervapour #watervapor #nucleus #nucleation #cloud #whitening #climatemodels #cloudformation #clouds #weather #albedo #plankton #phytoplankton #remotesensing #satellite #MODIS #model #modeling #Antarctic #sunlight #climate #reflection #climatechange #warming #radiation #dimethylsulfide #aerosl #particles #marineboundarylayer #MBL
@noaa

This Friday, 10:30 PM EST, @pierrekawak talks about his work on #simulation of #crystal #nucleation in polymer melts! twitch.tv/open_science
#STEM #scicomm #chemtwitter #openscience #streaming #educational #chemistrymastodon #chemistry #Twitch #science #ScienceMastodon

Our latest work headed by former postdoc Aamir Ali finally out - we describe cooperation of XMAP215 family microtubule polymerase ch-TOG/CKAP5 with #gammaTuRC in promoting #microtubule #nucleation in human cells.
Details here: https://rdcu.be/c4cFp For a summary continue 1/n 👇🏼

Mineral Dust Aerosol Impacts On Global Climate And Climate Change
--
https://phys.org/news/2023-01-atmospheric-masking-greenhouse-gases-effect.html <-- shared article
--
https://www.nature.com/articles/s43017-022-00379-5 <-- shared paper
--
#GIS #spatial #mapping #model #modeling #global #spatialanalysis #atmosphere #dust #duststorm #climatechange #Earth #energybudget #preindustrial #anthropegenic #climatemodels #radiativeforcing #clouds #future #energy #emmision #deposition #sediment #climate #dustmass #loading #nucleation

Of course, I didn't even know then that many #snowflakes have bacteria at their centre! #Ice formation requires #nucleation, and #bacteria are everywhere...