Canadian Wildfires & Saharan dust – a complex mixture of aerosols over Europe in recent days. Aerosol Optical Depth Forecast for organic matter and dust, update 2025-06-13. Impressive new animation by the scientists @CopernicusEU

https://youtu.be/L9NlJsJUUTg

Explaining corresponding article: https://atmosphere.copernicus.eu/new-cams-video-shows-intense-dust-and-smoke-activity-over-europe

#PlanetaryHealth #Aerosols #PlanetaryScience #PlanetaryBoundary #SciComm #WildFire #Dust #Observatory

Penguin Poo Seeds Antarctic Clouds

Forming clouds requires more than just water vapor; every droplet in a cloud forms around a tiny aerosol particle that serves as a seed that vapor can condense onto. Without these aerosols, there are no clouds. In most regions of the world, aerosols are plentiful — produced by vegetation, dust, sea salt, and other sources. But in the Antarctic, aerosol sources are few. But a new study shows that penguins help create aerosols with their feces.

Penguin feces is ammonia-rich, and that ammonia, when combined with sulfur compounds from marine phytoplankton, triggers chemistry that releases new aerosol particles. The researchers measured ammonia carried on the wind from nearby penguin colonies and found that the birds are a large ammonia source, producing 100 to 1000 times the region’s baseline ammonia levels. In combination with another ingredient in penguin guano, the researchers found the penguins boosted aerosol production 10,000-fold. That means penguins can actually influence their environment, helping to create clouds that keep Antarctica cooler. (Image credit: H. Neufeld; research credit: M. Boyer et al.; via Eos)

#aerosols #biology #chemistry #cloudFormation #condensation #fluidDynamics #penguins #physics #science

The role of aerosol declines in recent warming

SO2 declines have contributed ~25% of recent #warming and driven recent acceleration - Zeke Hausfather

https://www.theclimatebrink.com/p/the-role-of-aerosol-declines-in-recent

#climate #ClimateChange #GlobalWarming #aerosols #sulphur

NASA 3D Wind Measuring Laser Aims to Improve Forecasts from Air, Space https://www.nasa.gov/general/nasa-3d-wind-measuring-laser-aims-to-improve-forecasts-from-air-space/ #NASA #General #Aerosols #AirborneScience #Clouds #Earth #LangleyResearchCenter

Airborne Aerosol Wind Profiler (AWP) Measurements

#AerosolBackscatter #AtmosphericWinds #WindProfiles #aerosols #aircraft #winds

⏩ 1 new picture and 2 new videos from NASA (SVS) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=5&user=OptimusPrimeBot&ilshowall=1&offset=20250428125822

Simulating a Sneeze

Sneezing and coughing can spread pathogens both through large droplets and through tiny, airborne aerosols. Understanding how the nasal cavity shapes the aerosol cloud a sneeze produces is critical to understanding and predicting how viruses could spread. Toward that end, researchers built a “sneeze simulator” based on the upper respiratory system’s geometry. With their simulator, the team mimicked violent exhalations both with the nostrils open and closed — to see how that changed the shape of the aerosol cloud produced.

The researchers found that closed nostrils produced a cloud that moved away along a 18 degree downward tilt, whereas an open-nostril cloud followed a 30-degree downward slope. That means having the nostrils open reduces the horizontal spread of a cloud while increasing its vertical spread. Depending on the background flow that will affect which parts of a cloud get spread to people nearby. (Image and research credit: N. Catalán et al.; via Physics World)

#aerosols #biology #coughing #COVID19 #diseaseTransmission #droplets #flowVisualization #fluidDynamics #physics #science #sneezing #turbulence

Profling #Antarctic #Aerosols and #Clouds - #COALA Observes Key Climate Processes above Floating Ice: American Meteorological Society (#AMS) published a photo by our colleage Martin Radenz in this month's Bulletin of the American Meteorological Society (#BAMS) magazine. https://www.ametsoc.org/ams/publications/bulletin-of-the-american-meteorological-society-bams/ The paper from the #COALA project was published already in August https://doi.org/10.1175/BAMS-D-22-0285.1 & summarised here https://www.tropos.de/en/current-issues/press-releases/details/ein-jahr-antarktis-projekt-zur-wolkenforschung-an-der-deutschen-polarstation-neumayer-iii-erfolgreich / #COALA @dfg_public / #NeumayerIII @awi @britishantarcticsurvey

"Chopper une maladie qui a un nom de vaccin" : bin c'est dommage si on pouvait faire le-dit vaccin :shibasmug:

Avec les Etats-Unien•nes dont le système part en vrille,

C'est le moment de vérifier que vous avez votre vaccination #Rougeole (oreillons rubéole) à jour.
https://vaccination-info-service.fr/

Ah et sinon, pour les #rhumes, le #covid, la #grippe, la rougeole, ...
en attendant que nous décidions collectivement d'actions pour diminuer la présence des pathogènes aéoroportés dans les lieux clos collectifs (oui, je peux rêver),
le #masque protège...

Allez bisous

#AutodéfenseSanitaire #RéductionDesRisques #Aérosols

Discriminating between “drizzle or #rain” & sea salt #aerosols in #Cloudnet for measurements over the #Barbados Cloud Observatory - new #EUREC4A paper by @unileipzig @unileipzig.bsky.social & @TROPOS in #AMT @eurogeosciences -> https://doi.org/10.5194/amt-18-487-2025

SciTech Chronicles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Jan 10, 2025

https://bit.ly/stv011025

#1.5'C #evaporation #ENSO #aerosols #warming #rate #fungi #battery #non-toxic #biodegradable #yeast #xylophagous #Cold-water #immersion #TMT #mood #self-reported #bitcoin #liquidation #crypto #silk-road #DOJ #Patriot-Hills #freeze-thaw #erosion

[#Abstractions - Episode 3] Le monde d'après ...
https://www.culturediff.org/ocabstract3.htm

Un #paysage dépourvu d'éclat, dénué de toute #vie,
que les rayons du #Soleil ne parviennent à colorer ni animer,
réfléchis qu'ils sont par les #aérosols qui saturent notre #atmosphère.
Triste conséquence de notre « amour » immodéré pour les #combustibles #fossiles ...

#photographie #paysage #aérosols

| Editor’s Pick | Virology | Full-Length Text

"Influenza virus infection and aerosol shedding kinetics in a
controlled human infection mode"

https://journals.asm.org/doi/pdf/10.1128/jvi.01612-24 #Aerosols #Influenza #Flu

Q. COVID-19 transmission is airborne (inhaled #aerosols) so what type of #AirPurifier should I get for my home? A. Do you wear a mask at home? No. So unless you have visitors over, or if someone in your home is ill, an air purifier not needed to prevent #COVID19.

⚠️As Ontario heads to lockdown on Dec 26, many feel they can't avoid the social pressure to meet with family. If so, follow this comprehensive infographic to protect your family. Even covers the often overlooked protection from fecal #aerosols 💩🍥🌬️...

RE: https://bsky.app/profile/did:plc:3a43qvblimqkecprththymuj/post/3lb5i4ug3q322

#WeAddAerosols because #aerosols float and linger like cigarette smoke in rooms with low outdoor air exchange and no filtration. #DontShareAir Masks trap aerosols at the source *and* protect against inhalation of shared air. #MasksWork

#WeAddAerosols to illustrate why 2m #distance is not enough without a mask. Tiny respiratory #aerosols from coughing, singing, shouting, talking, and breathing, can float and linger in the air like cigarette smoke, especially in small rooms with poor #ventilation. #DontShareAir

Reducing the Risk of COVID-19 using engineering controls keeps infectious #aerosols at very low levels indoors offer the greatest promise to protect non-healthcare workers and other vulnerable populations. Direct download (PDF):...

#ventilation before #plexiglass! Evaluating #aerosols in restaurants. Of interest @caruzycki @AirQ007 @roger_yang_to Slides PDF: https://www.aivc.org/system/files/4_Traversari.pdf From April 1st AVIC building ventilation webinar (full set here:...

I've added some information toward the end of the page on my website about my work with night-sky brightness measurement and monitoring specifically regarding how dust and smoke suspended in the lower atmosphere affects the readings we get.

https://www.johncbarentine.com/night-sky-photometers.html

#LightPollution #DarkSkies #Aerosols #AtmosphericOptics #SkyBrightness

"We need to initiate discussions as soon as possible. With space debris, it took us 20 or 30 years to define a solution. With [the satellite air pollution] problem, if we move on the same kind of timescale, it might be too late."

https://www.space.com/montreal-protocol-satellites-air-pollution

#Satellites #Space #Geoengineering #MontrealProtocol #Environment #SpaceSustainability #Aerosols