2 50 1990 (Reductions in CO2 Emissions From Fossil Fuel Combustion by 50 Percent Compared With 1990 in the Regional Context)

2018 ◽  
Author(s):  
Vladimir Potashnikkv
Keyword(s):  
Co2 Emissions ◽  
Fossil Fuel ◽  
Fuel Combustion ◽  
Fossil Fuel Combustion ◽  
Regional Context

Evaluating the Carbon Embedded in the US Public Water Supply

2011 ◽  
Author(s):  
Kelly M. Twomey ◽  
Michael E. Webber
Keyword(s):  
United States ◽  
Carbon Dioxide ◽  
Water Supply ◽  
Greenhouse Gas ◽  
Co2 Emissions ◽  
Fossil Fuel ◽  
Fuel Combustion ◽  
Public Water Supply ◽  
Fossil Fuel Combustion ◽  
The Us

The United States uses approximately 5% of its primary energy and 6% of its electricity to pump, convey, treat, distribute, heat, and recondition water in the US public water supply. Allocating this energy towards water has contributed to a national public water distribution system that is considered among the best in the world, providing its users with a clean and reliable water supply. This water supply, treated to stringent water standards defined by the Environmental Protection Agency’s Safe Drinking Water Act, has been critical to the health and livelihood of United States’ citizens. However, this energy-expenditure comes at an environmental cost, since the majority of water-related energy is derived from burning fossil fuels. Fossil-fuel combustion emits carbon-dioxide, a greenhouse gas that has become of concern in recent years because of its connection to anthropogenic climate change. The amount of carbon-dioxide that is emitted from fossil-fuel combustion is principally a function of the quantity and type of fuel that is burned for energy. This first-order analysis quantifying national water-related carbon dioxide emissions is the second in a series of several analyses by the authors, quantifying the energy and greenhouse emissions embedded in the US public water supply. Results indicate that water withdrawal, conveyance, treatment, distribution, end-use preparation, and wastewater treatment produces approximately 301 million metric tonnes of CO2 emissions annually. This quantity is 5.1% of total US CO2 emissions in 2009, which is approximately equal to emissions from the gasoline consumed by one-quarter of the US passenger fleet in the same year. Considering that the emissions associated with water for industrial, municipal and self-supplied sectors (such as agriculture) were not included in this analysis, the actual quantity of carbon emissions released as a result of water-related activities is likely to be higher. Consequently, identifying efficiency measures and conservation schemes to reduce the amount of water-related energy consumed in the US might be significant in achieving future greenhouse gas emission reduction goals.

scholarly journals Toward consistency between bottom-up CO<sub>2</sub> emissions trends and top-down atmospheric measurements in the Los Angeles megacity

2015 ◽  
Vol 15 (20) ◽  
pp. 29591-29638 ◽  
Author(s):  
S. Newman ◽  
X. Xu ◽  
K. R. Gurney ◽  
Y.-K. Hsu ◽  
K.-F. Li ◽  
...  
Keyword(s):  
Los Angeles ◽  
Natural Gas ◽  
Co2 Emissions ◽  
Power Plants ◽  
Fossil Fuel ◽  
Fuel Combustion ◽  
Fossil Fuel Combustion ◽  
Atmospheric Measurements ◽  
Bottom Up ◽  
Gasoline Taxes

Abstract. Large urban emissions of greenhouse gases result in large atmospheric enhancements relative to background that are easily measured. Using CO2 mole fractions and Δ14C and δ13C values of CO2 in the Los Angeles megacity observed in inland Pasadena (2006–2013) and coastal Palos Verdes peninsula (autumn 2009–2013), we have determined time series for CO2 contributions from fossil fuel combustion for both sites and broken those down into contributions from petroleum/gasoline and natural gas burning for Pasadena. We find a 10 % reduction in Pasadena CO2 emissions from fossil fuel combustion during the Great Recession of 2008–2010, which is consistent with the bottom-up inventory determined by the California Air Resources Board. The isotopic variations and total atmospheric CO2 from our observations are used to infer seasonality of natural gas and petroleum combustion. For natural gas, inferred emissions are out of phase with the seasonal cycle of total natural gas combustion seasonal patterns in bottom-up inventories but are consistent with the seasonality of natural gas usage by the area's electricity generating power plants. For petroleum, the inferred seasonality of CO2 emissions from burning petroleum is delayed by several months relative to usage indicated by statewide gasoline taxes. Using the high-resolution Hestia-LA data product to compare emissions from parts of the basin sampled by winds at different times of year, we find that variations in observed fossil fuel CO2 reflect seasonal variations in wind direction. The seasonality of the local CO2 excess from fossil fuel combustion along the coast, on Palos Verdes peninsula, is higher in fall and winter than spring and summer, almost completely out of phase with that from Pasadena, also because of the annual variations of winds in the region. Variations in fossil fuel CO2 signals are consistent with sampling the bottom-up Hestia-LA fossil CO2 emissions product for sub-city source regions in the LA megacity domain when wind directions are considered.

scholarly journals Non-deforestation fire vs. fossil fuel combustion: the source of CO<sub>2</sub> emissions affects the global carbon cycle and climate responses

2016 ◽  
Vol 13 (7) ◽  
pp. 2137-2149 ◽  
Author(s):  
Jean-Sébastien Landry ◽  
H. Damon Matthews
Keyword(s):  
Carbon Cycle ◽  
Co2 Emissions ◽  
Fossil Fuel ◽  
Fire Regime ◽  
Terrestrial Ecosystems ◽  
Global Carbon Cycle ◽  
Fuel Combustion ◽  
Atmospheric Co2 ◽  
Fossil Fuel Combustion ◽  
Global Carbon

Abstract. Non-deforestation fire – i.e., fire that is typically followed by the recovery of natural vegetation – is arguably the most influential disturbance in terrestrial ecosystems, thereby playing a major role in carbon exchanges and affecting many climatic processes. The radiative effect from a given atmospheric CO2 perturbation is the same for fire and fossil fuel combustion. However, major differences exist per unit of CO2 emitted between the effects of non-deforestation fire vs. fossil fuel combustion on the global carbon cycle and climate, because (1) fossil fuel combustion implies a net transfer of carbon from geological reservoirs to the atmospheric, oceanic, and terrestrial pools, whereas fire occurring in terrestrial ecosystems does not; (2) the average lifetime of the atmospheric CO2 increase is longer when originating from fossil fuel combustion compared to fire, due to the strong vegetation regrowth following fire disturbances in terrestrial ecosystems; and (3) other impacts, for example on land surface albedo, also differ between fire and fossil fuel combustion. The main purpose of this study is to illustrate the consequences from these fundamental differences between fossil fuel combustion and non-deforestation fires using 1000-year simulations of a coupled climate–carbon model with interactive vegetation. We assessed emissions from both pulse and stable fire regime changes, considering both the gross (carbon released from combustion) and net (fire-caused change in land carbon, also accounting for vegetation decomposition and regrowth, as well as climate–carbon feedbacks) fire CO2 emissions. In all cases, we found substantial differences from equivalent amounts of emissions produced by fossil fuel combustion. These findings suggest that side-by-side comparisons of non-deforestation fire and fossil fuel CO2 emissions – implicitly implying that they have similar effects per unit of CO2 emitted – should therefore be avoided, particularly when these comparisons involve gross fire emissions, because the reservoirs from which these emissions are drawn have very different residence times (millions of years for fossil fuel; years to centuries for vegetation and soil–litter). Our results also support the notion that most net emissions occur relatively soon after fire regime shifts and then progressively approach zero. Overall, our study calls for the explicit representation of fire activity as a valuable step to foster a more accurate understanding of its impacts on global carbon cycling and temperature, as opposed to conceiving fire effects as congruent with the consequences from fossil fuel combustion.

scholarly journals Analysis The Intensity of CO2 Emissions from Fossil Fuel Combustion in Iraq

2021 ◽  
Vol 32 (2) ◽  
pp. 47
Author(s):  
Ahmed S. Hassan ◽  
Jasim H. Kadhum
Keyword(s):  
Carbon Dioxide ◽  
Co2 Emissions ◽  
Carbon Dioxide Emissions ◽  
Fossil Fuel ◽  
Fuel Combustion ◽  
Fossil Fuel Combustion ◽  
Activity Data ◽  
Long Time ◽  
Analysis Center ◽  
Per Capita

Carbon dioxide intensity (CI) refers to carbon dioxide emissions from fossil fuel combustion that mainly used for electricity, heat, transport, and other life requirements. The objective of this paper is better to understand CI as an indicator of Global Warming, and compared its behavior with two other variables (total CO2 emissions, and CO2 emissions per capita). The main data sources an available and activity data from Carbon Dioxide Information Analysis Center (CDIAC). Three annual variables used in this study; CI, total CO2 emissions, and CO2 per capita for fossil fuel emissions during long time series from (1971 to 2018).The results of CI shown that the highest value found out at the beginning of the study in 1971 was (7.188 kg/kg oil equivalent), and then decreased till reach to lower value was (1.707 kg/kg oil equivalent) in 1997, after that slowly increased in the last decade near to (3.63 kg/kg oil equivalent). The total CO2 emissions were strongly related to oil prediction. The highest value for total CO2 emissions was (188.1 Mt) in 2018, with Iraqi oil production more than (4.78 million barrel/day). The total CO2 emissions increased by (65. 176%) during the study period.  The total CO2 emissions were inversely proportional to CI.  The level of CO2 emission per capita rate fluctuated around average (3.49 metric tons per capita); the maximum rate was (4.99 metric tons per capita) in 2013.         

scholarly journals Estimation of observation errors for large-scale atmospheric inversion of CO2 emissions from fossil fuel combustion

Tellus B ◽  
2017 ◽  
Vol 69 (1) ◽  
pp. 1325723 ◽  
Author(s):  
Yilong Wang ◽  
Grégoire Broquet ◽  
Philippe Ciais ◽  
Frédéric Chevallier ◽  
Felix Vogel ◽  
...  
Keyword(s):  
Co2 Emissions ◽  
Large Scale ◽  
Fossil Fuel ◽  
Fuel Combustion ◽  
Fossil Fuel Combustion ◽  
Atmospheric Inversion
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