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The study will appear next month in the peer-reviewed journal ClimaticChange Letters. 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.
Significant climate anomalies 2008/2009. Source: ClimateChange Compendium. Shifts in the hydrological cycle resulting in the disappearance of regional climates with related losses of ecosystems, species and the spread of drylands northwards and southwards away from the equator. Click to enlarge. Earlier post.).
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. Click to enlarge. Both near-term and long-term strategies are essential, the report concludes.
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.
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.
A study led by Norwegian climate center CICERO has found that the global warming effect of leaked hydrogen is almost 12 times stronger than that of CO 2. Unlike exhaust from burning coal and gas that contains CO 2 , burning hydrogen emits only water vapor and oxygen. The climate effects of hydrogen have been an under-researched topic.
the final version of the proposed First Update to the ClimateChange Scoping Plan (First Update). The AB 32 Scoping Plan, which guides development and implementation of California’s greenhouse gas emission reduction programs. The California Air Resources Board (ARB) has released. The draft version was released in February.
Levels of two major air pollutants have been reduced significantly since lockdowns began in response to the COVID-19 pandemic, but a secondary pollutant—ground-level ozone—has increased in China, according to new research. Ozone is harmful to humans at ground-level, causing pulmonary and heart disease. —Guy Brasseur.
Aviation climatechange impacts pathway. An an example, they point out that an SPK fuel option with zero life cycle GHG emissions would offer a 100% reduction in GHG emissions but only a 48% reduction in actual climate impact using a 100-year time window and the nominal climate modeling assumptions in the paper.
Five technology paths for very-low-NO x and GHG emissions from heavy-duty natural gas engines. The “Pathways to Near-Zero-Emission Natural Gas Heavy Duty Vehicles” report, authored by GNA on behalf of Southern California Gas Co. California’s Climate Protection Strategies do not help meet NAAQS Standards. Click to enlarge.
Increasing the reflectivity or albedo of roofs and pavements in urban areas could offset greenhouse gas emissions by a significant amount, according to an open access paper published last month in the IOP journal Environmental Research Letters. by 2050.
New research by a team at the NASA Goddard Institute for Space Studies (GISS) in New York suggests that gas-aerosol interactions can amplify the global warming impact of some greenhouse gases. Methane’s GWP may also change with time as air quality regulations alter the background state of tropospheric chemistry. Source: Shindell at al.
From: Geoengineering the Climate (2009) Click to enlarge. unless future efforts to reduce greenhouse gas emissions are much more successful then they have been so far—potentially dangerous and unproven geoengineering will be required to cool the Earth this century, according to the latest report from the UK’s Royal Society.
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. in review).
In its recently released Inventory of US Greenhouse Gas Emissions and Sinks: 1990 – 2011 ( earlier post ), the US Environmental Protection Agency (EPA) reported that methane (CH 4 ) emissions from the field production of natural gas have declined by 36% from 2007 to 2011 (from 83.1 a global warming potential of 21. (The
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. —Cappa et al.
From 2005 through 2020, total US greenhouse gas (GHG) emissions are projected to rise by 4% under a “with measures” scenario (but without a cap-and-trade program and other complementary policies), from 7,109 Tg CO 2 Eq. The United States released previous Climate Action Reports in 1994, 1997, 2002, and 2006. to 7,416 Tg CO 2 Eq.,
Now, researchers from Sandia National Laboratory’s Combustion Research Facility, the University of Manchester and the University of Bristol report in a paper in Science the first direct kinetics measurements made of reactions of any gas-phase Criegee intermediate, in this case formaldehyde oxide (CH 2 OO). Carl Percival. —Welz et al.
Through a recent modeling experiment, a team of NASA-funded researchers have found that future concentrations of carbon dioxide and ozone in the atmosphere and of nitrogen in the soil are likely to have an important but overlooked effect on the cycling of water from sky to land to waterways. Cronin, J. Melillo, D. Kicklighter, C.
Currently, anthropogenic N 2 O emissions represent the largest contribution to ozone depletion. The study, published online 27 August in the journal Science , for the first time evaluated nitrous oxide emissions from human activities in terms of their potential impact on Earth’s ozone layer. Source: Ravishankara et al. The team, A.R.
An international team examining the total warming impact of 25 major synthetic greenhouse gases (SGHGs) has concluded that without additional limits on SGHG use, the resulting increase in warming could outweigh the climate benefits gained thus far from phasing down chlorofluorocarbons (CFCs). —Ronald Prinn. Rigby, M.,
CSIRO scientists have developed a new way to account for ozone in computer simulations of the climate. This latest modeling shows that the oceans take much less ozone out of the atmosphere than previously thought. Ozone (O 3 ) is formed by reactions of chemicals such as nitrogen oxides and volatile organic compounds—i.e.,
On the first day of a two-day board meeting—the second day of which (Friday 24 March) will consider the Advanced Clean Cars Midterm Review—the California Air Resources Board (ARB) took a number of climate and air quality actions. emissions by more than 20%. emissions by more than 20%.
A global phase down of HFCs could potentially reduce some 90 gigatons of CO 2 equivalent by 2050, equal to roughly two years worth of current global greenhouse gas emissions. While they do not deplete the ozone layer, many are highly potent greenhouse gases.
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 proposed cause or contribute finding concludes that that the combined emissions of CO 2 , CH 4 , N 2 O, and HFCs from new motor vehicles and motor vehicle engines contribute to the atmospheric concentrations of these key greenhouse gases and hence to the threat of climatechange.
A study by researchers at Lund University in Sweden found that Swedish biofuels produce between 65 and 148% less greenhouse gas emissions than gasoline and diesel, even when direct and indirect land use changes are taken into account. Direct and indirect land use changes were also studied. 68% from biodiesel (RME).
The leaders of the world have just returned from the UN's latest climatechange summit, COP26 , in which the countries that have signed on to the Paris Agreement upped their commitments to fight climatechange. C by the year 2100 , according to Climate Action Tracker. C above pre-industrial levels.
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. However, the underlying estimates do not take into account economic benefits of reduced climatechange.
Funding priorities through the ARFVT Program support fuel and vehicle development to help attain the state’s climatechange policies. Currently, the state’s transportation sector accounts for nearly 40% of the state''s greenhouse gas emissions; more than 95% of all transportation energy consumed in California is petroleum-based.
The California Air Resources Board on Thursday adopted the final greenhouse gas (GHG) emissions cap-and-trade regulation. Compliance obligations for greenhouse gas emissions begins 1 January 2013. the second, starting in 2015, brings in distributors of transportation fuels, natural gas and other fuels. Earlier post.)
The human health benefits associated with improvements in air quality related to the reduction in greenhouse gas emissions improvements can offset 26–1,050% of the cost of US carbon policies, depending upon the type of policy, according to a new study by a team from MIT. precursors through 2030. precursors through 2030.
That’s three times the amount estimated by the Intergovernmental Panel on ClimateChange (IPCC). Nitrous oxide is a potent greenhouse gas that contributes to climatechange and stratospheric ozone destruction. The findings, the authors hope, will lead to more effective mitigation strategies.
Health and other non-climate damages by life-cycle component for different combinations of fuels and light-duty automobiles in 2005 (top) and 2030 (bottom). Most vehicle and fuel combinations had similar levels of greenhouse gas emissions in 2005. Damages are expressed in cents per VMT (2007 USD). Source: “Hidden Costs of Energy”.
The regulation will cover 360 businesses representing 600 facilities and is divided into two broad phases: an initial phase beginning in 2012 that will include all major industrial sources along with utilities; and, a second phase that starts in 2015 and brings in distributors of transportation fuels, natural gas and other fuels.
Markey of the Energy and Environment Subcommittee on Tuesday released a draft of far-reaching energy and climate legislation that targets job creation, promotes renewables and energy efficiency, and places limits on emissions of greenhouse gases. Waxman of the Energy and Commerce Committee and Chairman Edward J.
Despite reports that global emissions of the potent greenhouse gas, HFC-23, were almost eliminated in 2017, an international team of scientists, led by the University of Bristol, has found atmospheric levels growing at record values. This gas has very few industrial applications. This would have been a big win for climate.
For the first time, observed Southern Hemisphere greenhouse gas (GHG) data can be easily accessed by the public on a new CSIRO website. The atmospheric level of carbon dioxide, which is the most important long-lived greenhouse gas influenced by human activities, is at its highest level in more than a million years. per cent each year.
The FY 2011-2012 plan focused primarily on five areas of interest: sustainable communities; behavior and technology adoption; health and air pollution exposures; air pollution science; and greenhouse gas targets. ARB will also consider projects outside of these areas, to the extent that they provide clear and direct support to its mission.
The US Environmental Protection Agency (EPA) released its latest set of proposed standards to reduce emissions of methane and volatile organic compounds (VOCs) from the oil and natural gas industry. The proposal also includes incentives to spur the oil and gas industry to minimize leaks.
California’s latest greenhouse gas data shows that while the state continues to stay below its 2020 target for emissions, there is much more work to do to achieve carbon neutrality by 2045. All these climate programs have considerably more stringent emissions reduction targets starting in 2021. tons per person to 10.7
This action is based on the premise that federal law preempts state and local tailpipe greenhouse gas (GHG) emissions standards as well as zero emission vehicle (ZEV) mandates. The California waiver authority exists because California has uniquely difficult problems with ozone-forming pollutants. Earlier post.)
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.
Reducing the greenhouse gas emissions from MACs have been under investigation since the late 1990s; cars equipped with R134a (tetrafluoroethane) MAC systems produce emissions corresponding to 7 grams of CO 2 per driven kilometer. With its GWP of 1, it is also the refrigerant that has the least impact on climate.
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