Greenhouse gas emissions and global warming potential of traditional and diversified tropical rice rotation systems

2015 ◽  
Vol 22 (1) ◽  
pp. 432-448 ◽  
Author(s):  
Sebastian Weller ◽  
Baldur Janz ◽  
Lena Jörg ◽  
David Kraus ◽  
Heathcliff S. U. Racela ◽  
...  
Keyword(s):  
Global Warming ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Global Warming Potential ◽  
Gas Emissions

The End of Meat

World on Fire ◽  
2021 ◽  
pp. 109-128
Author(s):  
Mark Rowlands
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Global Warming Potential ◽  
Energy Supply ◽  
Fossil Fuels ◽  
Gas Emissions ◽  
Eating Meat ◽  
Very High

The edge required by renewable technologies is provided by a simplification of the energy supply train. This simplification consists in no longer eating animals. Animals have upside-down energy returned on energy invested values (EROIs), with up to 30 times as much energy having to be put into raising them as we get out of them through eating them or their products. At one time, when our fossil fuels sported extraordinarily high EROIs—100:1 in some cases—we could afford to take this sort of hit on our food-based energy supply. Now, however, we can no longer afford to do so. Moreover, the results of this grossly inefficient energy exchange are rising greenhouse gas emissions. By no longer eating meat, we can reduce greenhouse gas emissions by roughly 14%. Importantly, much of this reduction will be in methane and nitrous dioxide, which have very high global warming potential relative to carbon dioxide.

Effect of straw returning in winter fallow in Chinese rice fields on greenhouse gas emissions: evidence from an incubation study

Soil Research ◽  
2015 ◽  
Vol 53 (3) ◽  
pp. 298 ◽  
Author(s):  
Yupeng Wu ◽  
Tian Liu ◽  
Qi'an Peng ◽  
Muhammad Shaaban ◽  
Ronggui Hu
Keyword(s):  
Global Warming ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Global Warming Potential ◽  
Soil Conditions ◽  
Gas Emissions ◽  
Straw Incorporation ◽  
Low Global Warming Potential ◽  
Straw Application ◽  
Winter Fallow

Many studies have been performed to compare different straw-returning methods that could provide environmental benefits. However, few studies have focused on the greenhouse gas emissions from straw returning under winter water-stored fields (flooded conditions) and winter fallow fields (non-flooded conditions), which are the common land use types after the rice harvest in southern China. Thus, in the present microcosm incubation experiment, CO2, CH4 and N2O emissions were compared under flooded and non-flooded soil conditions, following straw incorporation. Straw application stimulated CO2 cumulative emission, and this effect was exacerbated by flooding (1818 and 4271 mg kg–1 under non-flooded and flooded conditions, respectively). Although the application of straw can mitigate N2O cumulative emissions under flooded conditions (10 152 μg kg–1 without and –51 μg kg–1 with straw incorporation, respectively), higher CO2 and CH4 production was detected (4271 and 149.20 mg kg–1 for CO2 and CH4 cumulative emissions, respectively). In contrast, straw application under non-flooded conditions had a relatively low global warming potential value (1836 mg CO2 Eq kg–1). Consequently, winter fallow field is recommended after the integrated application of straw and nitrogen fertiliser because of its low global warming potential. However, different strategies may be required for long-term reduction in global warming potential values.

scholarly journals Analysis of energy balance and global warming potential in tangerine (Citrus tangerina Tanaka) orchards versus soybean (Glycine max (L.) Merr.) production system

2021 ◽  
Vol 117 (2) ◽  
pp. 1
Author(s):  
Seyed Saeed HOSSEINI ◽  
Hassan FEIZI ◽  
Hamed KAVEH ◽  
Hossein SAHABI
Keyword(s):  
Global Warming ◽  
Energy Consumption ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Global Warming Potential ◽  
Production System ◽  
Energy Use ◽  
Total Output ◽  
Gas Emissions ◽  
Harvesting Process

With the aim of evaluation and comparison of the greenhouse gas emissions from soybean and tangerine production in Golestan province, Iran, a pilot experiment was carried out. In this experiment, 43 fields of soybeans and 43 orchard tangerines were selected by various management in the province using questionnaires. The greenhouse gas emissions were examined using the Global Warming Potential (GWP). The results of this study showed that fossil fuel was the highest energy consumption in the production of soybeans (6906.5 MJ ha-1) and tangerines (17205.1 MJ ha-1). The lowest amount of energy consumption among inputs was related to micro fertilizers, that was 9 MJ ha-1 for soybeans and 17.6 MJ ha-1 for tangerine. In both of production system, the most energy consumed was shown for the harvesting sector. Irrigation and planting were the highest contributors to greenhouse gas emissions in soybean field by 387.7 and 109.4 kg CO2 ha-1, respectively; while in the tangerine production, the most greenhouse gas emissions were related to irrigation and harvesting process by 5828.4 and 394.7 kg CO2 ha-1. In general, input energy in soybean and tangerine were 17512.8 and 33879.8 MJ ha-1, total output energy was calculated 48310.5 and 105463 MJ ha-1. Finally, the energy use efficiency was computed for soybean and tangerine 2.9 and 3.3, respectively.

scholarly journals Technical note: On comparing greenhouse gas emission metrics

2020 ◽  
Author(s):  
Ian Enting ◽  
Nathan Clisby
Keyword(s):  
Global Warming ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Global Warming Potential ◽  
Radiative Forcing ◽  
Greenhouse Gas Emission ◽  
Technical Note ◽  
Gas Emission ◽  
Gas Emissions ◽  
Over Time

Abstract. Many metrics for comparing greenhouse gas emissions can be expressed as an instantaneous Global Warming Potential multiplied by the ratio of airborne fractions calculated in various ways. The Forcing Equivalent Index (FEI) provides a specification for equal radiative forcing at all times at the expense of generally precluding point by point equivalence over time. The FEI can be expressed in terms of asymptotic airborne fractions for exponentially growing emissions. This provides a reference against which other metrics can be compared.

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