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Springtime ozone distributions for 1984, 1995–2008 in the mid-troposphere (3.0–8.0 Springtime ozone levels above western North America are rising primarily due to air flowing eastward from the Pacific Ocean, a trend that is largest when the air originates in Asia. The US EPA recently proposed new tougher ground-level ozone standards.
Electricity sourced from sun and wind is used to split water into hydrogen and oxygen in a process called electrolysis. It is not possible to build wind and PV plants everywhere. Micropollutants such as pharmaceuticals, pesticides and cosmetics can be removed from wastewater when ozone is introduced.
The two combine in the atmosphere to make either nitric acid or peroxynitrous acid; the so-called branching ratio of these two chemicals is important in models of ozone production. This means less of the hydroxyl radical and nitrogen dioxide go away, leading to proportionately more ozone, mostly in polluted areas, Okumura said.
Illustration of projected ozone changes in the South Coast region due to climate change in 2050. Areas in orange and red could see ozone concentrations elevated by 9 to 18 parts per billion. Click to enlarge. These narrow-focused models utilize high-resolution information about the geography, meteorology and emissions of these areas.
Researchers in France have found that ozone depletion above Antarctica has significantly reduced the Southern Ocean’s ability to absorb atmospheric CO 2 and has also accelerated acidification of southern polar waters, despite lesser CO 2 uptake. The results revealed that, between 1987 and 2004, around 2.3 Lenton, A., Tagliabue, and J.
Of our "alternative fuel" options, only electricity can truly be made renewably (wind, solar, geothermal, small hydro), with no carbon or other noxious emissions. And only electric drive cars can operate truly zero-emission. We need to prioritize clean electricity generation and plug-in battery cars to utilize that energy efficiently.
China is responsible for only a small percentage of the annual pollution in the US, but powerful global winds known as “westerlies” can push airborne chemicals across the ocean in days, particularly during the spring, causing dangerous spikes in contaminants. Maximum daily percentage of sulfate pollution in US related to Chinese exports.
solar, wind, hydroelectric, and nuclear) as compared to the eastern US (EUS), where the electricity market is dominated by pollutant and precursor emitting combustion sources (i.e., Among the findings: Summer surface ozone (O 3 ) decreases in most locations due to widespread reductions of traffic NO x emissions. NH 3 -poor for PM).
They found that reductions in ground ozone during this 35-year period resulted in $600 million in increased production annually by the early 2010s. Another difference is that some grains can be annually modified to withstand greater heat and even higher ozone levels in the air. An open-access paper on the work appears in Nature Food.
This in turn causes a reduction in nighttime winds that would otherwise blow pollutants out to sea. In addition, built structures interfere with local winds and contribute to relatively stagnant afternoon weather conditions. Fei and his colleagues focused on wind patterns, which are driven by temperature contrasts between land and sea.
Bromine also can remove ozone from the lowest layer of the atmosphere, the troposphere. Despite ozone’s beneficial role blocking harmful radiation in the stratosphere, ground-level ozone is a harmful pollutant. Bromine then reacts with a gaseous form of mercury, turning it into a pollutant that falls to Earth’s surface.
Carried long distances across the country by wind and weather, power plant emissions of sulfur dioxide (SO 2 ) and nitrogen oxide (NO x ) continually travel across state lines. reductions; annual NO x reductions; and ozone-season NO x. Ozone Season NO x Power Plant Emissions. NO x emissions will drop by 54%. Source: EPA.
Other notable highlights in the inventory include: For the first time since California started to track GHG emissions, in-state and total electricity generation from zero-GHG sources (for purposes of the GHG inventory, these include solar, hydro, wind, and nuclear) exceeded generation from GHG-emitting sources.
Arrows denote winds at this level derived from meteorological analysis, showing that the HCN maximum is linked with the upper tropospheric Asian monsoon anticyclone. This could explain satellite measurements showing high levels of stratospheric ozone, water vapor and other chemicals over Asia during summer. Source: Randel et al.,
However, emissions do not just remain in conurbations; particles and gaseous pollutants can be transported thousands of kilometers by the wind. The transport and transformation of plumes from selected European and Asian major population centers (MPCs) will now be investigated with special focus on the rate of formation of ozone and aerosols.
The results demonstrate that the major opportunity for reducing the life cycle impacts of the battery pack is to use clean energy supply for battery operation, such as solar and wind electricity, which could reduce these environmental impacts significantly. —Li et al.
Since it began, the HPC4Mfg Program has funded a total of 60 industry projects, ranging from improving the reliability and lifetime of wind turbines to studying how to mitigate defects in the 3D printing of metal parts to reducing emissions from semiconductor processing that could potentially harm the ozone layer.
To optimize the use of solar, wind and hydropower production, new types of weather, climate and hydrological services are needed. It also plays an important role in the destruction of the stratospheric ozone layer which protects us from the harmful ultraviolet rays of the sun. Its atmospheric concentration in 2016 was 328.9
The committee that wrote the report focused on monetizing the damage of major air pollutants—sulfur dioxide, nitrogen oxides, ozone, and particulate matter—on human health, grain crops and timber yields, buildings, and recreation. By 2030, nonclimate damages are estimated to fall to 0.11 cents per kwh. cents to 5 cents per kilowatt-hour.
In addition, other studies have shown that increases in PM 2.5 , NO 2 , and ozone were associated with lower test scores that were “equivalent to the effects of short-term reductions of thousands of dollars in district median household income.” The more vehicles that switch to running on electricity, the better.
power from renewable sources—wind, solar, geothermal, biomass or landfill gas, hydropower, and marine and hydrokinetic—for retail electricity suppliers beginning at 6% in 2012 and gradually rising to 25% in 2025 and continuing at that level through 2039. The draft establishes a Renewable Portfolio Standard—i.e.,
And so back in, I believe it was the 80s, it might have been earlier than that, Paul Knutson who famously identified the ozone whole problem, he put forward the idea that putting material in the stratosphere might be an interesting way to reflect sunlight to cool the planet. So that was a long-winded answer to your question.
Neutral Kaitou KID @ Apr 19th 2009 4:45PM not if the electricity is from ultra efficient solar panels, hydroelectric dams or wind. Highly Ranked catachip @ Apr 19th 2009 4:57PM @ Elodie As long as the electricity is generated from wind, hydro, solar, or nuclear then there are zero emissions. Neutral who? @
This proposal reduces emissions contributing to fine particle (PM 2.5 ) and ozone nonattainment that often travel across state lines. SO 2 and NO x react in the atmosphere to form fine particle pollution and ground-level ozone (smog), which are linked to widespread illnesses and premature deaths. NO x emissions would drop by 52%.
In general, the researchers find that when air pollution is generated in one state, half of that pollution is lofted into the air and carried by winds across state boundaries, to affect the health quality of out-of-state residents and increase their risk of early death. and/or ozone. Early-death source–receptor matrices for 2011.
According to Forbes , studies have found that solar and wind power is often cheaper than power from fossil fuels, even without financial assistance, and their daily operations undercut even the most cost-effective coal plants. It uses the power of wind pushing turbines to collect energy.
Depletion of Antarctic ozone is a more important factor than increasing greenhouse gases in shifting the Southern Hemisphere jet stream in a southward direction, according to researchers at Penn State. Understanding the differences between these two forcings is important in predicting what will happen as the ozone hole recovers.
Maintenance robots used in servicing wind turbines, for example, must endure intense temperature fluctuations, high humidity, prolonged UV radiation exposure, and powerful wind loads. Fluoroprene XP, in particular, offers superior resistance to aggressive chemicals, including solvents, lubricants, fuels, and industrial cleaning agents.
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