Aerosols Current Events

Aerosols Current Events, Aerosols News Articles.
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Fire aerosols decrease global terrestrial ecosystem productivity through changing climate
Cooling, drying, and light attenuation are major impacts of fire aerosols on the global terrestrial ecosystem productivity. (2020-05-20)

Masks reduce airborne transmission of SARS-CoV-2
Growing evidence suggests that SARS-CoV-2, the novel coronavirus that causes COVID-19, can be spread by asymptomatic people via aerosols -- a reality that deeply underscores the ongoing importance of regular widespread testing, wearing masks and physical distancing to reduce the spread of the virus, say Kimberly Prather and colleagues in a new Perspective. (2020-05-27)

Colorado State University scientist simplifies aerosols for modeling
The large number of tiny organic aerosols floating in the atmosphere -- emitted from tailpipes and trees alike -- share enough common characteristics as a group that scientists can generalize their makeup and how they change in the atmosphere. (2010-05-26)

Summer observation campaigns to study pollution in the Asian tropopause layer
Scientists find the aerosols in the boundary layer are mostly pollution out of human activities, and the aerosols in the upper troposphere may also contain natural aerosols, like mineral dust and volcanic sulfate aerosols, (2020-06-14)

New insight into ocean-atmosphere interaction and subsequent cloud formation
Organic compounds undergo drastic variations in their chemical composition as they transfer from the ocean's surface to atmospheric aerosols which act as nuclei to form clouds. (2018-11-25)

How aerosols affect our climate
Greenhouse gases may get more attention, but aerosols -- from car exhaust to volcanic eruptions -- also have a major impact on the Earth's climate. Using a massive NASA dataset, Yale researchers have created a framework that helps explain just how sensitive local temperatures are to aerosols. (2019-10-17)

Aerosols -- their part in our rainfall
Aerosols may have a greater impact on patterns of Australian rainfall and future climate change than previously thought, according to leading atmospheric scientist, CSIRO's Dr. Leon Rotstayn. (2009-02-17)

Aerosols -- their part in our rainfall
Aerosols may have a greater impact on patterns of Australian rainfall and future climate change than previously thought, according to leading atmospheric scientist, CSIRO's Dr. Leon Rotstayn. (2009-02-12)

Climate change scientists must turn their attention to clean skies
Natural aerosols, such as emissions from volcanoes or plants, may contribute more uncertainty than previously thought to estimates of how the climate might respond to greenhouse gas emissions. (2013-11-06)

The reasons behind aerosol pollution over the eastern slope of the Tibetan Plateau
The aerosol optical depth over the eastern slope of the Tibetan Plateau (ESTP) is extremely large -- and even more so than some important industrialized regions and deserts, which is the result of a combination of human activities and natural conditions. (2019-08-08)

Model Shows Certain Gasses Could Stimulate Global Cooling
New computer modeling suggests that global warming might not be entirely a product of human activity. The research shows that carbon and sulfur emissions can have the reverse effect, serving to cool down the planet. (1997-12-12)

New proposal for how aerosols drive increased atmospheric convection in thunderstorm clouds
High in the clouds, atmospheric aerosols, including anthropogenic air pollutants, increase updraft speeds in storm clouds by making the surrounding air more humid, a new study finds. (2020-12-31)

Exploring ocean waters to characterize atmospheric aerosols
Aerosols play a major role in cloud formation, with a strong impact on climate models. They are however hard to study due to the small size and immense variety of their constituent particles. Researchers from the University of Geneva, Switzerland, aboard the PlanetSolar Deepwater expedition, successfully linked the composition of marine biological aerosols to that of bodies of water under them, paving the way to their indirect study and to more accurate climate models. (2017-03-31)

Symposium examines the growing influence of aerosols on climate
In a few decades, it's likely that scientists will look back at the early part of the 21st century and regard it as a fundamental stage in understanding the importance of the effects of aerosols on Earth's climate. In fact, it was in this time period, they may say, that aerosols were first found to be as climatologically significant as greenhouse gases. (2004-02-14)

Human activities worsen air quality in Dunhuang, a desert basin in China
Due to the increasing contribution of human activities, air quality has become worse in the most recent decade over the Dunhuang area, and the main reason is a shift to a mixture of coarse and fine particles, having previously been due to dust aerosol alone. (2017-06-29)

The silver lining: Scientists examine how aerosol types influence cloud formation
Not all aerosols are made equally. Sea salt and some types of wild fire smoke can take flight to create clouds and, eventually, rain, while other aerosols, such as mineral dust, do not work as well. Scientists are beginning to understand exactly how these different particles influence cloud formation and resulting precipitation over land and sea. (2018-01-09)

Current atmospheric models underestimate the dirtiness of Arctic air
Black carbon aerosols are important for understanding climate change. Unfortunately, current simulation models consistently underestimate the amount of these aerosols in the Arctic compared to actual measurements. Now, scientists used the K computer to perform fine-grained simulations of how black carbon aerosols are transported to and distributed in the Arctic region. By using smaller grids they were able to show that they could more realistically model the amount of black carbon aerosols. (2016-05-25)

Summer haze cools southeastern US
Global warming may include some periods of local cooling, according to a new UC Berkeley study. Results from satellite and ground-based sensor data show that sweltering summers can, paradoxically, lead to the temporary formation of a cooling haze in the southeastern United States. (2009-05-18)

Cloud formation suppressed by biogenic organic emissions
Researchers have found evidence that near-ground biogenic emissions of organics suppress cloud formation in cool-temperate forests in autumn, providing clues to how global warming will affect cloud formation and the overall climate. (2017-09-06)

Large volcanic eruption may have caused the first mass extinction
Researchers say they may have found the cause of the first mass extinction of life. (2017-05-17)

Local sources major cause of US near-ground aerosol pollution
A new NASA study estimates that most ground-level particulate pollution in the US stems from regional sources in North America and only a small amount is brought to the country from other parts of the world. (2007-11-16)

Scientists accurately model the action of aerosols on clouds
Global climate is a tremendously complex phenomenon, and researchers are making painstaking progress, year by year, to try to develop ever more accurate models. Now, an international group including researchers from the Advanced Institute for Computational Science (AICS) in Japan, using the powerful K computer, have for the first time accurately calculated the effects of aerosols on clouds in a climate model. (2018-03-08)

Particulate pollution's impact varies greatly depending on where it originated
Aerosols are tiny particles that are spewed into the atmosphere by human activities, including burning coal and wood. They have negative effects on air quality -- damaging human health and agricultural productivity. New work from Carnegie's Geeta Persad and Ken Caldeira demonstrates that the impact these fine particles have on the climate varies greatly depending on where they were released. (2018-08-17)

NCAR Team Tags 'Imported' Pollutants Over The Pacific Northwest
From 50% to 60% of sulfate-aerosol pollution over the Pacific Northwest is coming from industrialized Asia, according to a model developed by a team of researchers at the National Center for Atmospheric Research. In contrast, sulfates in Europe are coming primarily from European sources. (1998-12-04)

Modeling Atmospheric Aerosols
Sponsored by the Office of Naval Research, a three-week experiment called Electro-Optical Propagation Assessment in Coastal Environments is currently underway to improve the atmospheric aerosol models for predicting infrared propagation near the ocean surface and in coastal environments. (1999-03-01)

Fire air pollution weakens forest productivity
Fire impacts on global carbon cycle. The damage to ecosystem productivity not only occurs in fire regimes, but also over the downwind areas through long-range transport of air pollution. Such negative impacts may exacerbate in the future as fire activities are expected to escalate in a warming climate. (2018-12-21)

The puzzling problems of urban particle formation
Researchers who studied the heavily polluted air of Shanghai, China, between 2014 and 2016 report the chemical conditions that led to the surprising formation of new particles in the city's atmosphere, particles that likely worsened regional air quality. (2018-07-19)

The complexities of clouds and the seeds that make them
In an effort to understand exactly how the micro and macro cloud properties interact with atmospheric particles, a collaborative research team conducted a modeling study analyzing three well-documented weather systems that occurred in March of 2000 over the southern Great Plains in the United States. (2018-01-10)

NASA study finds tiny particles in air may influence carbon sinks
A NASA-funded study provides direct measurements confirming aerosols, tiny particles in the atmosphere, may be changing how much carbon plants and ecosystems absorb from or release to the air. (2004-12-16)

NASA study improves ability to predict aerosols' effect on cloud cover
Using a novel theoretical approach, researchers from NASA and other institutions have identified the common thread that determines how aerosols from human activity, like the particles from burning of vegetation and forests, influence cloud cover and ultimately affect climate. The study improves researchers' ability to predict whether aerosols will increase or decrease cloud cover. (2008-08-14)

NASA-NOAA's Suomi NPP tracks fire and smoke from two continents
Wherever fires are burning around the world NASA-NOAA's Suomi NPP satellite's Ozone Mapping and Profiler Suite (OMPS) can track the smoke and aerosols. On Sept. 13, 2019, data from OMPS revealed aerosols and smoke from fires over both South America and North America. (2019-09-13)

Report calls aerosol research key to improving climate predictions
Scientists need a more detailed understanding of how human-produced atmospheric particles, called aerosols, affect climate in order to produce better predictions of Earth's future climate, according to a NASA-led report issued by the US Climate Change Science Program on Friday. (2009-01-16)

Rapid upper ocean warming linked to declining aerosols
Australian scientists have identified causes of a rapid warming in the upper subtropical oceans of the Southern Hemisphere. (2013-07-22)

Agricultural area residents in danger of inhaling toxic aerosols
Excess selenium from fertilizers and other natural sources can create air pollution that could lead to lung cancer, asthma, and Type 2 diabetes, according to new UC Riverside research. (2020-02-03)

Scientists explain the impacts of aerosol radiative forcing
Aerosol optical properties and direct radiative effects on surface irradiance were examined using seven years (2006-2012) of Cimel sunphotometer data collected at Panyu--the main atmospheric composition monitoring station in the Pearl River Delta (PRD) region of China. Optical properties and radiative impacts of the absorbing particles can be used to improve the accuracy of inversion algorithms for satellite-based aerosol retrievals in the PRD region and to better constrain the climate effect of aerosols in climate models. (2018-02-05)

Has northern-hemisphere pollution affected Australian rainfall?
Australian scientists using a climate model that includes a treatment of tiny particles -- or aerosols -- report that the build up of these particles in the northern hemisphere affects their simulation of recent climate change in the southern hemisphere, including rainfall in Australia. (2009-08-26)

Physics: An ultrafast glimpse of the photochemistry of the atmosphere
Researchers at Ludwig-Maximilians-Universitaet (LMU) in Munich have explored the initial consequences of the interaction of light with molecules on the surface of nanoscopic aerosols. (2019-10-11)

Aerosols from coniferous forests no longer cool the climate as much
Emissions of greenhouse gases have a warming effect on the climate, whereas small airborne particles in the atmosphere, aerosols, act as a cooling mechanism. That is the received wisdom in any case. However, new research from Lund University in Sweden can now show that the tiniest aerosols are increasing at the expense of the normal sized and slightly larger aerosols -- and it is only the latter that have a cooling effect. (2019-09-25)

Dust from the Sahara Desert cools the Iberian Peninsula
Spanish and Portuguese researchers have analyzed the composition and radiative effect of desert aerosols during two episodes which simultaneously affected Badajoz, Spain and √Čvora, Portugal in August 2012. Results show that the intrusion of dust from the Sahara Desert caused radiative cooling of the Earth's surface. (2015-04-29)

Increased water vapor in stratosphere possibly caused by tropical biomass burning
The doubling of the moisture content in the stratosphere over the last 50 years was caused, at least in part, by tropical biomass burning, a Yale researcher has concluded from examining satellite weather data. (2002-02-20)

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