Reduction of CO2 emissions to decelerate and reverse global warming using mathematical analysis

2021 ◽  
Author(s):  
Sateeh Kumar D. ◽  
Mohiddin Shaw Shaik ◽  
P. V. N. Hanumantha Ravi ◽  
J. Venkateswararao
Keyword(s):  
Global Warming ◽  
Co2 Emissions ◽  
Mathematical Analysis ◽  
Reduction Of Co2

scholarly journals Effect of Urban Heat Island and Global Warming Countermeasures on Heat Release and Carbon Dioxide Emissions from a Detached House

Atmosphere ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 572
Author(s):  
Daisuke Narumi ◽  
Ronnen Levinson ◽  
Yoshiyuki Shimoda
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Heat Release ◽  
Urban Heat Island ◽  
Co2 Emissions ◽  
Heat Island ◽  
Sensible Heat ◽  
Heating Season ◽  
Urban Heat ◽  
Cooling Effects

Urban air temperature rises induced by the urban heat island (UHIE) effect or by global warming (GW) can be beneficial in winter but detrimental in summer. The SCIENCE-Outdoor model was used to simulate changes to sensible heat release and CO2 emissions from buildings yielded by four UHIE countermeasures and five GW countermeasures. This model can evaluate the thermal condition of building envelope surfaces, both inside and outside. The results showed that water-consuming UHIE countermeasures such as evaporative space cooling and roof water showering provided positive effects (decreasing sensible heat release and CO2 emissions related to space conditioning) in summer. Additionally, they had no negative (unwanted cooling) effects in winter since they can be turned off in the heating season. Roof greening can provide the greatest space- conditioning CO2 emissions reductions among four UHIE countermeasures, and it reduces the amount of heat release slightly in the heating season. Since the effect on reducing carbon dioxide (CO2) emissions by UHIE countermeasures is not very significant, it is desirable to introduce GW countermeasures in order to reduce CO2 emissions. The significance of this study is that it constructed the new simulation model SCIENCE-Outdoor and applied it to show the influence of countermeasures upon both heat release and CO2 emissions.

scholarly journals Delay-induced rebounds in CO2 emissions and critical time-scales to meet global warming targets

2016 ◽  
Vol 4 (12) ◽  
pp. 636-643 ◽  
Author(s):  
Gabriele Manoli ◽  
Gabriel G. Katul ◽  
Marco Marani
Keyword(s):  
Global Warming ◽  
Co2 Emissions ◽  
Time Scales ◽  
Critical Time ◽  
Global Warming Targets

scholarly journals Evaluation of the Climate Impact Reduction Potential of the Water-Enhanced Turbofan (WET) Concept

Aerospace ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 59
Author(s):  
Regina Pouzolz ◽  
Oliver Schmitz ◽  
Hermann Klingels
Keyword(s):  
Co2 Emissions ◽  
Aircraft Engine ◽  
Steam Injection ◽  
Climate Impact ◽  
Formation Mechanisms ◽  
Water Recovery ◽  
Impact Reduction ◽  
Fuel Burn ◽  
Starting Point ◽  
Reduction Of Co2

Aviation faces increasing pressure not only to reduce fuel burn, and; therefore, CO2 emissions, but also to provide technical solutions for an overall climate impact minimization. To combine both, a concept for the enhancement of an aircraft engine by steam injection with inflight water recovery is being developed. The so-called Water-Enhanced Turbofan (WET) concept promises a significant reduction of CO2 emissions, NOx emissions, and contrail formation. Representative missions for an A320-type aircraft using the proposed new engine were calculated. Applying a first-order one-dimensional climate assessment prospects the reduction of more than half of the Global Warming Potential over one hundred years, compared to an evolutionarily improved aero-engine. If CO2-neutrally produced sustainable aviation fuels are used, climate impact could be reduced by 93% compared to today’s aircraft. The evaluation is a first estimate of effects based on preliminary design studies and should provide a starting point for discussion in the scientific community, implying the need for research, especially on the formation mechanisms and radiation properties of potential contrails from the comparatively cold exhaust gases of the WET engine.

scholarly journals Controlling CO2 emissions for each area in a region: the case of Japan

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Tetsuya Tamaki ◽  
Wataru Nozawa ◽  
Shunsuke Managi
Keyword(s):  
Global Warming ◽  
Comparative Analysis ◽  
Economic Impact ◽  
Co2 Emissions ◽  
Integrated Assessment ◽  
The Other ◽  
Output Gap ◽  
Emission Target ◽  
Emission Quota ◽  
Capital Transfer

Abstract Background Global warming is the most serious problem we face today. Each country is expected to ensure international cooperation toward minimizing risk. To evaluate the countermeasures, many researchers have developed integrated assessment models (IAMs). Then, how can each country achieve its emission quota? This study proposes models that analyze the economic impact of global warming in a region based on the results obtained by the global model. By using these suggested models, we perform a comparative analysis on three policy cases: a different regulations case, a unified regulation case, and an output redistribution case. Results We analyzed Japan as one of the case studies and found that more developed areas should implement stricter regulations in all scenarios. In addition, the case of applying different regulations by area (in a region) is not always preferable to using unified regulations in the region. Alternatively, the output gap between the output redistribution case and the different regulations case is much higher than the gap between the unified regulation case and the different regulations case. In all scenarios, the present values of the output of the output redistribution case are also higher than the other cases. Conclusions The different regulations case and the unified regulation case are based on the model without capital transfer between areas, whereas the output redistribution case is based on the model with free capital transfer between areas. Although both models are extreme situations, the regions close to the without capital transfer situation possibly have an incentive to use the different regulations policy, depending on the emission target. The regions close to the situation with free capital transfer would probably prefer unified regulation.

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