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New analysis has found increasing emissions of several ozone-depleting chemicals despite their production being banned for most uses under the Montreal Protocol—and a loophole in the rules is likely responsible. According to the researchers, emissions from these CFCs currently do not significantly threaten ozone recovery.
Significant climate anomalies 2008/2009. Source: ClimateChange Compendium. For 30 reference glaciers in nine mountain ranges tracked by the World Glacier Monitoring Service, the mean rate of loss since 2000 has roughly doubled since the rate during the previous two decades. Click to enlarge. Earlier post.).
Schematic diagram of the trade-offs between the implications for regional air quality and global climatechange of new policies for management of the atmosphere. The complex roles that ozone and aerosols play in the atmosphere provide examples of such trade-offs. Source: NOAA. Click to enlarge.
The climatechange benefit is estimated for 2050 and human health and crop benefits are for 2030 and beyond. Black carbon and tropospheric ozone are harmful air pollutants that also contribute to climatechange. °C (within a likely range of 0.2-0.7 Click to enlarge.
Shown are the tipping elements [large-scale components of the Earth’s system] and the temperature threshold range that initiates the tipping. Cutting HFCs, black carbon, tropospheric ozone, and methane can buy us about 40 years before we approach the dangerous threshold of 2°C warming. From Molina et al. Earlier post.) Mario Molina. (Dr.
It makes an important contribution to the scientific understanding we have of the role of aviation for climatechange—an understanding decision-makers and politicians may need on the way to achieving the goals of the Paris Agreement. 2 (5–95% likelihood range of (55, 145)) with major contributions from contrail cirrus (57.4?mW?m
have developed a simulator able to predict tropospheric ozone concentrations across the whole of South and East Asia. Tropospheric ozone is the main cause of photochemical smog, an atmospheric pollutant harmful to human health and plant growth. Toyota Motor Corporation (TMC) and Toyota Central R&D Labs.,
Exposure to ozone, long associated with impaired lung function, is also connected to health changes that can cause cardiovascular disease such as heart attack, high blood pressure and stroke, according to a new study of Chinese adults. They monitored indoor and outdoor ozone levels, along with other pollutants.
The decrease in CO 2 equivalent emissions of ODSs (ozone-depleting substances: CFCs, halons, HCFCs, and others) may be offset by the projected increase in their non-ozone depleting substitutes (HFCs) (lines designated as HFC scenarios). The contribution of HFCs to climate forcing is currently less than 1% of all greenhouse gases.
This approach will make it easier to identify sectors for which emission reductions will be most beneficial for climate and those which may produce unintended consequences.”. Reducing emissions from the on-road transportation sector is particularly attractive because this action yields both rapid and longer-term climate benefits.
The system will graph lifecycle impact for a range of specified powertrains, for a large number of impact categories: Climatechange [kg CO 2 -eq.]. Deterioration of the ozone layer [kg CFC-11-eq.]. The top sample above shows climatechange impact; the subsequent chart shows human toxicity.
The global market for rocket launches may require more stringent regulation in order to prevent significant damage to Earth’s stratospheric ozone layer in the decades to come, according to a new study by researchers in California and Colorado. Darin Toohey.
The study will appear next month in the peer-reviewed journal ClimaticChange Letters. Relying more on natural gas would reduce emissions of carbon dioxide, but it would do little to help solve the climate problem. However, the effects of natural gas on climatechange have been difficult to calculate.
The researchers believe the measurements will substantially impact the understanding of atmospheric chemistry mechanisms—in particular, in the more rapid formation of secondary aerosols, important in the formation of local smog as well as in global climatechange. Carl Percival. —Welz et al. —Marston (2012).
Both studies indicate a qualitatively similar response of a reduction in radiative forcing or an increase in total outgoing radiation for an increase in urban albedo and the values indicate an approximate range in potential emitted CO2 offset that may be expected if urban albedos were increased. —Menon et al.
The global warming potentials (GWP) of HFCs range from 140 (HFC-152a) to 11,700 (HFC-23), according to the US EPA. HFCs are chemicals are potential substitutes for ozone-depleting and climate-warming CFCs and HCFCs currently being phased out under the Montreal Protocol treaty to protect the ozone layer.
Decomposition of the decadal change in total global CO 2 emissions from fossil fuel combustion by four driving factors; population, income (GDP) per capita, energy intensity of GDP and carbon intensity of energy. Scenarios reaching higher concentrations include similar changes, but on a slower timescale. Click to enlarge.
The seven themes are: Taking Action on ClimateChange. Jackson said that EPA must follow up the progress it made in 2009 with a range of greenhouse gas reduction initiatives with ensuring compliance with the law. Improving Air Quality. Other themes include: Assuring the Safety of Chemicals.
Although viewed as a potential target in the global effort to reduce climatechange, atmospheric black carbon particles absorb significantly less sunlight than scientists have predicted, according to a new study by an international team of researchers, published in the journal Science. Credit: Cappa et al. Click to enlarge.
Awards are expected to be in the range of $300,000 to $1,000,000 per year. NSF said that is chose a time span of several decades because within this timeframe modeled climatechange responses appear to be insensitive to CO 2 forcing scenarios.
Development of sustainable communities strategies can also provide an opportunity for associated criteria pollutant emission reductions that will be needed to attain air quality standards for ozone and particulate matter as well as reduce near-roadway exposures.
The US Environmental Protection Agency (EPA) has submitted its final Report to Congress on Black Carbon , in response to an October 2009 request from Congress to advance efforts to understand the role of black carbon (BC) in climatechange. Earlier post.). This GHG effect warms the Earth’s surface and the lower atmosphere. Source: EPA.
That figure does not include damages from climatechange, harm to ecosystems, effects of some air pollutants such as mercury, and risks to national security, which the report examines but does not monetize. Damages per vehicle mile traveled were remarkably similar among various combinations of fuels and technologies—the range was 1.2
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. A total of approximately 100 flight hours are planned for the measurement flights in the emission plumes of Asian cities, said John P.
Respectively, Title IV of the 1990 Clean Air Act and the Ozone Transport Commission/NO x Budget Program.). The cap-and-trade programs Taylor studied exhibited lower-than-expected allowance prices, in part because program participants adopted an unexpected range of approaches for reducing emissions sources in the lead-up to trading.
In addition to CO 2 , other compounds such as ozone (O 3 ) precursors (nitrogen oxides (NO x =NO+NO 2 ), carbon monoxide (CO), and volatile organic compounds (VOCs)) and aerosols such as black carbon (BC) and organic carbon (OC) are emitted by ships. The paper is published in the ACS journal Environmental Science & Technology.
Each spectrometer will focus on a different range of colors, and will detect the specific colors that are absorbed by carbon dioxide and molecular oxygen. This illustration color-codes instrument swaths—the area of Earth’s surface, or the surface of its atmosphere, over which data is collected—based on observed wavelength ranges.
Compared to the 2010 “Business as Usual” scenario—which includes all adopted emission control measures for the South Coast—NO x levels must be reduced by 65% and by 75% to meet the 2023 and 2032 ozone standards, respectively. An 80% reduction of GHG emissions is targeted for 2050, relative to 1990 levels.
The report did note, however, that there are some serious questions over adverse effects with this method, particularly depletion of stratospheric ozone. Geoengineering and its consequences are the price we may have to pay for failure to act on climatechange.”. Evaluating candidate particles. Delivery Systems.
GWP100 weighted specific climate impact (g CO 2 -eq per pkm) as a function of vehicle occupancy. Bold parts of curves indicate typical occupancy ranges. compared the specific climate impact of long-distance car travel with bus, train, or air trips. shorter-lived climate forcers (SLCFs).
However, climatechange has caused an increase in rainfall in recent years, which now raises the issue of environmental contamination. We are putting a range of possible options to the test, with the intention of identifying the most effective individual modules and the most successful sequence of steps.
We estimate ozone and SOA formation potential. Finally, we analyze the potential climate effects of switching a PFI to a GDI fleet. Therefore, the secondary organic aerosol and ozone formation potential of the exhaust does not depend on engine technology. —Saliba et al.
Many ports and related freight corridors and facilities are located in nonattainment or maintenance areas for EPA’s ozone and PM 2.5 Through this initiative, EPA is engaging a wide range of stakeholders including ports and port operators, communities, tribes, state and local governments, industry, and other technical and policy stakeholders.
A polynomial chaos expansion and the probabilistic collocation method have been used to develop the metamodel, and its coefficients, so that it is applicable under a broad range of present-day and future conditions. —Cohen and Prinn. Cohen and Prinn used meteorological and emissions data from 16 representative urban areas.
As we confront the enormous challenge of climatechange, we should take inspiration from even the most unlikely sources. Take, for example, the tens of thousands of fossil-fueled ships that chug across the ocean, spewing plumes of pollutants that contribute to acid rain, ozone depletion, respiratory ailments, and global warming.
In 2004, the Centralina region (the Greater Charlotte metro area, which straddles the North CarolinaSouth Carolina border) was designated as a non-attainment area for ozone under the Clean Air Act. They will offer much greater range and will be refueled as quickly as vehicles that run on petroleum products.
Ozone pollution across the continental United States will become far more difficult to keep in check as temperatures rise, according to new work led by the National Center for Atmospheric Research (NCAR). The RCPs were chosen to represent a broad range of climate outcomes, based on a literature review. Ozone formation.
The climatechange benefit is estimated for a given year (2050) and human health and crop benefits are. Fast action on pollutants such as black carbon, ground-level ozone and methane may help limit near term global temperature rise and significantly increase the chances of keeping temperature rise below 2 °C (3.6 °F)—and
What I do know, is how fossil fuel vehicles have contributed heavily to poor air quality in our towns and cities, damage to the environment, soil and water quality and have contributed to the depletion of the ozone layer! It is a sizeable vehicle and feels like a Range Rover! It can certainly tow like a Range Rover!
A study by a team of researchers from China, the US and Germany suggests that future climatechange may worsen air quality for more than 85% of China’s population, leading to an additional 20,000 deaths each year. and ozone exposure, respectively. and ozone in 2050 by factors of 1 and 3, respectively. RCP 4.5). (The
Global and regional zonal mean temperature changes relative to 2010 due to non-CO 2. Bars on the right show uncertainty ranges for 2070, including contributions from both forcing and climate sensitivity (67%; CI). million metric tons of avoided ozone-related yield losses of major food crops; $US0.6-2.4 Shindell et al.
A new report prepared by the World Bank at the request of the G8 identifies ways that the World Bank can do more through its projects to reduce the emission of short-lived climate pollutants (SLCPs): black carbon, methane, tropospheric ozone, and fluorinated gases known as HFCs. Black carbon ClimateChange Emissions'
Many of the strategies employed to reduce GHG emissions will also work to meet the national ambient air quality standard for ozone in 2032. However, to achieve the needed transportation GHG reductions and the corresponding 2032 ozone standards, the market uptake of advanced technologies will need to be accelerated.
GRF is located in the coastal mountain range of southwestern Mendocino County, California, and encompasses approximately one-third of the entire 72,000-acre Garcia River watershed. ozone depletion potential (ODP). photochemical ozone creation potential. Click to enlarge. acidification potential.
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