Tootfinder

Massive Mt. Ruang eruption sends plumes nearly 70,000 feet high
Indonesia’s Mount Ruang has erupted at least three times this week,
forcing the evacuation of hundreds of people.
On Wednesday evening local time, the volcano’s eruption shot ash nearly 70,000 feet high,
possibly spewing aerosols into the stratosphere,
the atmosphere’s second layer.

The Volcanic Ash Advisory Center in Darwin, Australia, wrote that there were “two volcanic ash layers discer…

Massive Mt. Ruang eruption sends plumes nearly 70,000 feet high
The eruption may even have injected aerosols into the stratosphere.

Massive Mt. Ruang volcanic eruption sends plumes nearly 70,000 feet high #geology #Indonesia
https://wapo.st/3WlOfrJ

Massive Mt. Ruang eruption sends plumes nearly 70,000 feet high
The eruption may even have injected aerosols into the stratosphere.

On the Stochasticity of Aerosol-Cloud Interactions within a Data-driven Framework
Xiang-Yu Li, Hailong Wang, TC Chakraborty, Armin Sorooshian, Luke D. Ziemba, Christiane Voigt, Kenneth Lee Thornhill
https://arxiv.org/abs/2403.08702

On the Stochasticity of Aerosol-Cloud Interactions within a Data-driven Framework
Aerosol-cloud interactions (ACI) pose the largest uncertainty for climate projections. Among many challenges of understanding ACI, the question of whether ACI is deterministic or stochastic has not been explicitly formulated and asked. Here we attempt to answer this question by predicting cloud droplet number concentration Nc from aerosol number concentration Na and ambient conditions. We use aerosol properties, vertical velocity fluctuation w', and meteorological states (temperature T and wate…

Surfactant-laden bubble bursting: dynamics of capillary waves and Worthington jet at large Bond number
Paula Pico, Lyes Kahouadji, Seungwon Shin, Jalel Chergui, Damir Juric, Omar K. Matar
https://arxiv.org/abs/2404.09196

Surfactant-laden bubble bursting: dynamics of capillary waves and Worthington jet at large Bond number
We present a numerical study of the main sub-stages preceding aerosol formation via bursting bubbles: capillary wave propagation along the bubble, convergence at the bubble's apex, the ascent of a Worthington jet and its break-up to release liquid drops. We focus on two crucial yet overlooked aspects of the system: the presence of surface-active agents and dynamics driven by non-negligible gravitational effects, quantified by the Bond number. Our results propose, for the first time, a mechanism…

Enhanced ClNO$_2$ formation at the interface of sea-salt aerosol
Seokjin Moon, David T. Limmer
https://arxiv.org/abs/2403.09052 https://

Enhanced ClNO$_2$ formation at the interface of sea-salt aerosol
The reactive uptake of $\mathrm{N_2O_5}$ on sea-spray aerosol plays a key role in regulating NO$_\mathrm{x}$ concentration in the troposphere. Despite numerous field and laboratory studies, a microscopic understanding of its heterogeneous reactivity remains unclear. Here, we use molecular simulation and theory to elucidate the chlorination of $\mathrm{N_2O_5}$ to form ClNO$_2$, the primary reactive channel within sea-spray aerosol. We find the formation of ClNO$_2$ is markedly enhanced at the a…

Kijk, bij TBC mag dit *wel* gewoon gezegd worden. Maar dat de Sars-Cov-2 virussen (die toch vele malen kleiner zijn dan de tbc bacterien) ook op die aerosolen zouden kunnen meeliften is dan weer onwaarschijnlijk, die hebben die grote 'droplets' nodig??
"De ziekte verspreidt zich voornamelijk via hoesten, maar ook simpelweg via de ademhaling."

4 van de 5 tuberculosepatiënten hebben geen hardnekkige hoest
Meer dan 80% van de patiënten met tuberculose (tbc), ’s werelds meest dodelijke infectie, heeft geen hardnekkige hoest, ondanks dat dit wordt gezien als een kenmerkend symptoom van tbc. Voor een onderzoek onder leiding van Amsterdam UMC en Amsterdam Institute for Global Health and Development (AIGHD), werd data geanalyseerd van meer dan 600.000 mensen in Afrika en Azië. Daaruit bleek dat 82,8% van de tbc-patiënten geen hardnekkige hoest had. 62,5% van de patiënten hoestte zelfs helemaal n…

Investigation of the Thermal Structure in the Atmospheric Boundary Layer During Evening Transition and the Impact of Aerosols on Radiative Cooling
Suryadev Pratap Singh, Mohammad Rafiuddin, Subham Banerjee, Sreenivas K R
https://arxiv.org/abs/2403.06656

Investigation of the Thermal Structure in the Atmospheric Boundary Layer During Evening Transition and the Impact of Aerosols on Radiative Cooling
We have explored the evening transition using data from eighty days of observations across two fog seasons at the Kempegowda International Airport, Bengaluru (KIAB). Through field experiments and simulations integrating aerosol interaction in a radiation-conduction model, we elucidate the impact of aerosols on longwave cooling of the Atmospheric Boundary Layer (ABL). Field observations indicate that under calm and clear-sky conditions, the evening transition typically results in a distinct vert…

Perspectives on physics-based one-dimensional modeling of lung physiology
Aranyak Chakravarty, Debjit Kundu, Mahesh V. Panchagnula, Alladi Mohan, Neelesh A. Patankar
https://arxiv.org/abs/2403.09203

Perspectives on physics-based one-dimensional modeling of lung physiology
The need to understand how infection spreads to the deep lung was acutely realized during the Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) pandemic. The challenge of modeling virus laden aerosol transport and deposition in the airways, coupled with mucus clearance, and infection kinetics, became evident. This perspective provides a consolidated view of coupled one-dimensional physics-based mathematical models to probe multifaceted aspects of lung physiology. Successes of 1D trum…

Nou, dit mag wel in de krant.
WHO die eindelijk erkent dat #COVIDisAirborne .... en dat je daar wat mee (tegen) kunt doen ...
https://iris.who.int/bitst…

This https://arxiv.org/abs/2402.12942 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Field calibration and analysis of a low-cost sensor network based on the existing air quality infrastructure of a city
Low-cost particulate matter sensors (LCS) are an important source of air quality data, improving the spatial and temporal resolution of data gathered by sparsely placed official monitoring stations. Their readings, however, are subject to bias due to unaccounted for effects pertaining to both the physical properties of the aerosol particles and design limitations of the devices. A calibration model is paramount in order to valorize the output of LCS devices. In this paper, a calibration model…