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Ground-level ozone has long been known to pose a threat to human health. Now, scientists are increasingly understanding how this pollutant damages plants and trees, setting off a cascade of impacts that harms everything from soil microbes, to insects, to wildlife. Read more on E360 ?.
Smoke from bushfires that spread across Australia in late 2019 and early 2020 destroyed high-altitude ozone in the Southern Hemisphere, according to a study that offers new insight into the threat posed by wildfires. Read more on E360 ?.
By Georgina Gustin At its annual conference on climate change this week, the United Nations released a major report saying the world has little hope of reaching global climate targets without quickly lowering emissions of nitrous oxide, a greenhouse gas that’s nearly 300 times more powerful at warming the atmosphere than carbon dioxide.
Scientists are worried about the effect this cooling could have on orbiting satellites, the ozone layer, and Earth’s weather. A new study reaffirming that global climate change is human-made also found the upper atmosphere is cooling dramatically because of rising CO2 levels. Read more on E360 →
By Bob Berwyn After sampling the atmosphere above the Arctic for more than a year during the MOSAiC research voyage , climate scientists say the ozone layer, Earth’s protection against intense ultraviolet radiation, is at risk, despite the progress made in protecting atmospheric ozone by the 1987 Montreal Protocol , the global treaty that banned ozone-harming (..)
Sweltering heat in Greece, ozone-damaging chemicals on the decline and an investigation of what space does to our body are all in this week’s news roundup.
The discovery of a hole in Earth’s protective ozone layer in 1985 led to a worldwide effort to heal it, but are there lessons that can be applied to today’s treaty talks on climate change?
The Montreal Protocol, which phased out the use of ozone-depleting chemicals, not only saved the ozone layer, but also staved off an additional 2.5 degrees C (4.5 degrees F) of warming by the end of this century, according to a new study. Read more on E360 ?.
Our ozone layer serves as a lifesaving UV barrier for planet earth, functioning to absorb most of the sun’s ultraviolet radiation. At the same time, ground-level ozone pollution is extremely harmful to human health. As the complexity of ozone pollution is often misunderstood, let's take a closer look at this particular pollutant.
Each year between August and October, the ozone over the South Pole is depleted – this year the hole is larger than 75 per cent of the holes that had formed by this point in the season since 1979
Bakersfield, Fresno, and Visalia are consistently ranked as cities with the worst particulate and ozone pollution , according to the American Lung Association. and ozone concentrations highlighting air quality issues in the Central Valley. Annual average PM2.5 Graphics from CalEnviroScreen 4.0
On Friday, EPA announced that it was reconsidering its 2020 decision to leave the National Ambient Air Quality Standards for ozone unchanged. However, EPA stated that it: will reconsider the decision to retain the ozone NAAQS in a manner that adheres to rigorous standards of scientific integrity. Still whistling in the wind , I fear.
The dominant factors are changes in CO2 (a cooling), ozone depletion (a cooling), warming from big volcanoes, and oscillations related to the solar cycle. That means the greenhouse substances are basically just CO2 and ozone, and they absorb in quite different parts of the spectrum. But why is the stratosphere increasingly chill?
Ozone levels above the mid-southern hemisphere dropped 13 per cent after Australia’s worst fires on record due to chemical reactions triggered by the smoke
The international treaty to protect the ozone layer has had the inadvertent benefit of protecting plants and avoiding up to 1°C of future climate change this century, almost as much as the world has warmed to date.
This year has been characterised by cold and strong polar vortices, resulting in strong ozone depletion and a reminder of how much the ozone hole can vary annually as it heals
Both locations near the Paris and Oak Creek sites experience ozone and small particulate matter (PM 2.5 ) concentrations above the states average, signaling that these local communities are already facing heavy environmental health risks.
The American Lung Association’s State of the Air report measures three of the major types of pollutants in the San Joaquin Valley: long-term particle matter, short-term particle matter, and ozone. Ozone, too, poses significant risks to respiratory health. Ozone plays a dual role in our atmosphere.
By Phil McKenna Emissions of a small group of chlorofluorocarbons (CFCs), man-made chemicals that destroy Earth’s protective ozone layer and fuel global warming, are back on the rise after their production was all but banned more than a decade ago, a new study concludes.
Exposure to ozone from air pollution may be connected to a rise in depression among adolescents, a new study has found. The study, published in the journal Developmental Psychology on Monday, is the first to link ozone levels to the development of depression in adolescents over time. Read the full story at The Hill.
The world’s oceans are a vast repository... The post Oceans may start emitting ozone-depleting CFCs appeared first on successful GREEN. As atmospheric concentrations of CFC-11 drop, the global ocean should become a source of the chemical by the middle of next century, a new MIT study predicts.
Today, the New York Times reported that a recent assessment shows that the world is on track to reach pre-1980 levels of upper atmosphere ozone by roughly 2040. Especially when it’s good news about effective international cooperation on environmental protection issues. .
The Hunga Tonga–Hunga Ha‘apai volcano erupted in January 2022 with the force of an atomic weapon. The disaster has launched dozens of new studies about global warming
One good example of the nexus between global warming and local pollution is ground-level ozone. To make matters worse, NOx contributes to the formation of ground-level ozone and secondary PM2.5, Ground-level ozone is the sixth criteria air pollutant, but is created from precursors. Secondary PM2.5
The combined health effects of ozone pollution and extreme heat disproportionately hurt poorer areas, according to a new study analyzing hospitalizations by ZIP code in California. Read the full story at Smart Cities Dive.
An aerial survey of Los Angeles reveals that high temperatures cause plants to emit more compounds that can contribute to harmful ozone and PM2.5 air pollution
Without the Montreal Protocol, more solar radiation would have destroyed plants, lessening the CO2 they absorb. -- Read more on ScientificAmerican.com.
Additionally, NOx react with other chemicals in the air to create other harmful pollutants, like fine particulate matter and ozone. In the Los Angeles Basin, where ozone pollution is the worst in the nation, the South Coast Air Quality Management District is also years behind.
The key conclusions were that the internal variability, and treatment of ozone and aerosol forcings make material differences to the comparisons and that these need to be considered part of the structural uncertainty in the models.
Succeeding in the climate arena will also show that human beings can cooperate to address global issues, just as we did in protecting the ozone layer and eliminating smallpox. We will also have preserved important tropical forests and their incredibly rich and diverse ecosystems.
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