Microbial Production and Consumption of Greenhouse Gases: Methane, Nitrogen Oxides, and Halomethanes. Based on a Workshop Held in Athens, Georgia, 14-16 November 1989.John E. Rogers , William B. Whitman

1993 ◽  
Vol 68 (3) ◽  
pp. 455-456
Author(s):  
F. J. Bergersen
Keyword(s):  
Nitrogen Oxides ◽  
Greenhouse Gases ◽  
Microbial Production ◽  
Production And Consumption

Modeling of a dry low nitrogen oxides burner using a three-dimensional computational fluid dynamics simulation

2021 ◽  
pp. 095440892110355
Author(s):  
Guodong Sun ◽  
Xuejing Duan ◽  
Bo Hao ◽  
Afshin Davarpanah
Keyword(s):  
Nitrogen Oxides ◽  
Greenhouse Gases ◽  
Power Plants ◽  
Three Dimensional ◽  
Control Policy ◽  
Dynamics Simulation ◽  
Weather Patterns ◽  
United Nations General ◽  
Fluent Software ◽  
Low Nitrogen

Nitrogen oxides are considered as one of the greenhouse gases. Among the most significant emission sources for this gas is a natural gas-fired power plant. The United Nations General assembly suggested in 1988 that human activities can negatively impact weather patterns, and thus they should be controlled. This control policy can improve the efficiency of final consumers such as power plants, cars, or other energy-intensive industries. In this paper, the existing strategies and explicitly making the dry low nitrogen oxides burner reduce greenhouse gases in power plants are explored. The geometry of the burner has been produced in a three-dimensional form in GAMBIT software, and the results of the simulation have been expressed through FLUENT software. Contours of pressure, temperature, and velocity of the fluid in the furnace are also derived. It is concluded that the dry low nitrogen oxides burners plan has a better result compared with other strategies.

scholarly journals Climate forcing by battered-and-breaded fillets and crab-flavored sticks from Alaska pollock

Elem Sci Anth ◽  
2019 ◽  
Vol 7 ◽  
Author(s):  
Brandi L. McKuin ◽  
Jordan T. Watson ◽  
Alan C. Haynie ◽  
J. Elliott Campbell
Keyword(s):  
Supply Chain ◽  
Nitrogen Oxides ◽  
Organic Carbon ◽  
Greenhouse Gases ◽  
Food Production ◽  
Production Systems ◽  
Climate Impact ◽  
Climate Forcing ◽  
Anthropogenic Sources ◽  
Seafood Products

The food sector is a significant contributor to greenhouse gas emissions, contributing 10–32% of global anthropogenic sources. Compared with land-based food production systems, relatively little is known about the climate impact of seafood products. Previous studies have placed an emphasis on fishing activities, overlooking the contribution of the processing phase in the seafood supply chain. Furthermore, other studies have ignored short-lived climate forcing pollutants which can be particularly large for ship fuels. To address these critical knowledge gaps, we conducted a carbon footprint analysis of seafood products from Alaska pollock, one of the world’s largest fisheries. A holistic assessment was made including all components in the supply chain from fishing through retail display case, including a broad suite of climate forcing pollutants (well-mixed greenhouse gases, sulfur oxides, nitrogen oxides, black carbon and organic carbon), for domestic and top importers. We found that in some instances the processing phase contributed nearly twice the climate impact as the fishing phase of the seafood supply chain. For highly fuel-efficient fisheries, such as the Alaska pollock catcher-processor fleet, including the processing phase of the seafood supply chain is essential. Furthermore, the contribution from cooling emissions (sulfur and nitrogen oxides, and organic carbon) offsets a significant portion of the climate forcing from warming emissions. The estimates that include only greenhouse gases are as much as 2.6 times higher than the cases that include short-lived climate forcing pollutants. This study also advances our understanding of the climate impact of seafood distribution with products for the domestic retail market having a climate impact that is as much as 1.6 times higher than export products that undergo transoceanic shipping. A full accounting of the supply chain and of the impact of the pollutants emitted by food production systems is important for climate change mitigation strategies in the near-term.

scholarly journals The Microbiologists’ Warning: a Warning from All Microbiologists’ to Humanity

2019 ◽  
Vol 40 (3) ◽  
pp. 99
Author(s):  
Rick Cavicchioli
Keyword(s):  
Climate Change ◽  
Greenhouse Gases ◽  
Human Activities ◽  
Consensus Statement ◽  
Microbial World ◽  
Call To Action ◽  
Environmentally Sustainable ◽  
Sustainable Future ◽  
Production And Consumption

The Microbiologists’ Warning is a Consensus Statement proclaiming that microorganisms are so critical to achieving an environmentally sustainable future that ignoring them risks the fate of Humanity. It aims to raise awareness of the microbial world and make a call to action for microbiologists to become increasingly engaged in, and microbial research to become increasingly infused into, the frameworks for addressing climate change. We must learn not just how microorganisms affect climate change (including production and consumption of greenhouse gases), but also how they will be affected by climate change and other human activities.

scholarly journals Landscape patterns of soil oxygen and atmospheric greenhouse gases in a northern hardwood forest landscape

2011 ◽  
Vol 8 (6) ◽  
pp. 10859-10893 ◽  
Author(s):  
S. F. Werner ◽  
C. T. Driscoll ◽  
P. M. Groffman ◽  
J. B. Yavitt
Keyword(s):  
Greenhouse Gases ◽  
Greenhouse Gas ◽  
Unsaturated Soils ◽  
Landscape Patterns ◽  
Saturated Soils ◽  
Soil Oxygen ◽  
Soil Redox ◽  
Depth Profiles ◽  
Production And Consumption ◽  
High Concentrations

Abstract. The production and consumption of the greenhouse gases, carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4), are controlled by redox reactions in soils. Together with oxygen (O2), seasonal and spatial dynamics of these atmospheric gases can serve as robust indicators of soil redox status, respiration rates, and nitrogen cycling. We examined landscape patterns of soil oxygen and greenhouse gas dynamics in Watershed 3 at the Hubbard Brook Experimental Forest, NH, USA. We analyzed depth profiles of soil O2, CO2, N2O, and CH4 approximately bimonthly for one year. Soil gas depth profiles were obtained from several different soil types encompassing a range of topographic positions, drainage classes, and organic matter content. Soil O2 was a good predictor of greenhouse gas concentrations. Unsaturated soils always had O2 concentrations >18 %, while saturated soils had O2 ranging from 0 to 18 %. For unsaturated soils, changes in CO2 were nearly stoichiometric with O2. High concentrations of CH4 (>10 μL L−1) were typically associated with saturated soils; CH4 was typically below atmospheric concentrations (<1.8 μL L−1) in unsaturated soils. High concentrations of N2O (>5000 nL L−1) were found only in well-aerated soils after summer rainfall events and in marginally-anoxic soils; N2O was consumed (<200 nL L−1) under anoxic conditions. The production and consumption of greenhouse gases were linked to functionally distinct biogeochemical zones of variable redox conditions (hotspots), which exhibit dynamic temporal patterns of redox fluctuations (hot moments). These soil redox hot phenomena were temporally driven by climate and spatially organized by soil type (reflective of topographic position) further constrained by subsurface hydrology.

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