• Journal of the Society of Disaster Information
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• v.16 no.4
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• pp.849-856
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• 2020

Purpose: Greenhouse gases are one of the major causes of global warming, a global disaster. It aims to improve how effective the GHG reduction policy, which is the main cause of global warming in the transportation sector, has been effective on the highway and how to calculate GHG emissions. Method: Using the DSRC raw data, we estimate the emissions of Namhae Expressway (Yeongam-Suncheon) from 2017 to 2019 in two ways, a macro method (conventional) and a micro method (individual vehicle). Result: As a result of calculating the emission of the highway, the result was far exceeding the estimated emission, and it was found that when the calculation was performed for each vehicle, it was underestimated by more than 20%. Conclusion: If more emissions are continuously emitted than expected in the current transportation sector, additional emission reduction policies are needed to achieve the current greenhouse gas reduction targets. In addition, in the calculation of emissions, which is the basis of this policy, analysis was conducted for each individual vehicle using the current DSRC raw data, but using GPS afterwards will enable precise emission calculation through a more microscopic analysis.

• Environmental and Resource Economics Review
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• v.31 no.4
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• pp.865-885
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• 2022

Korean government updated her Nationally Determined Contribution (NDC) in 2021 and announced the target and various measures for reductions. Among the many issues, final energy demand and renewable energy power mix for 17 provinces to achieve the target are being analyzed using GCAM-Korea. Simulation results show that final energy demand of 2030 is approximated at the similar level to that of 2018. This is being enabled by the conservation of coal with higher electrification especially in industry sector. Higher power demand with lower coal consumption in final energy consumption is shown to be provided by 33.1% of renewable, 24.6% of gas, and 18.0% of nuclear power generation in 2030. Meanwhile, the share of coal-fired power generation is expected to be reduced to 12.8%. Major future power provider becomes Gyeongbuk (Nuclear), Gyeonggi (Gas), Jeonnam (Nuclear, Gas) and Gangwon (PV, Wind), compared to one of current major power provider Chungnam (Coal). This analysis is expected to provide a useful insight toward the national and provincial energy and climate change policy.

• Korean Journal of Environmental Biology
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• v.37 no.3
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• pp.309-316
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• 2019

Cropland is a major source of atmospheric nitrous oxide (N₂O) and we need technologies in the field of agriculture that can reduce the presence of N₂O. In this study, a field experiment encompassing six treatments was conducted to determine the efflux of N₂O in cropland during the growing season. An experimental plot was composed of two main sectors, no-tillage (NT) and conventional tillage (CT), which were subdivided into three plots according to types of nitrogen (N) sources: CF, chemical fertilizer; HV, hairy vetch+chemical fertilizer; and RY, rye+chemical fertilizer. The cumulative N₂O emissions were 179.8 mg N₂O m^-2 for CF-CT, 108.1 mg N₂O m^-2 for HV-CT, 303.5 mg N₂O m^-2 for RY-CT, 86.7 mg N₂O m^-2 for CF-NT, 73.8 mg N₂O m^-2 for HV-NT, and 122.7 mg N₂O m^-2 for RY-NT during the fallow season. The CT, HV, and RY of no-tilled soils were reduced by 51.8, 31.7 and 59.6%, respectively (p<0.001). Our results indicate that the use of no-tillage and hairy vetch practice rather than conventional tillage and chemical fertilizer practice can decrease N₂O emission.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.3043-3051
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• 2013

As abnormal climate phenomena frequently happen due to the after-effect of the global warming, all nations suggest climate change response policies in many different fields to prevent global warming by reducing greenhouse gas. Especially, these days, the realization that the greenhouse gas from city buildings should be decreased is growing, and it is because that buildings are accounted for a quarter of national greenhouse gas emission and it is more than half the percentage of emissions within the city. Accordingly, Korean government sees the need to take an initiating role to fulfill low-carbon green policies and promotion strategies in the public sector, and wants to facilitate greenhouse gas reduction in the private sector as well. In this background, this study tries to examine the low-carbon planning element in public buildings and figure out the amount of carbon reduction and economic analysis centering Cheongju city as case study. Lastly, we propose some suggestion for low-carbon and greening of public buildings.

• Journal of Korean Society of Forest Science
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• v.98 no.3
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• pp.263-271
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• 2009

This study aims to identify negotiation alternatives related to Post-2012 reducing emissions from deforestation (RED) and enhancement of forest carbon stock (EFCS) activities. It also aims to recommend a negotiation strategy considering environmental integrity and national interest on the basis of estimating reduction potentials of each alternative on the assumption that tradable carbon credits play an important role as positive incentives. In order to estimate greenhouse gas (GHG) reduction potentials and income potential from RED and EFCS activities, 99 countries were selected by the Global Forest Resources Assessment of the Food and Agriculture Organization of the United Nations. A 'baseline and credit' method was applied to estimate RED activities. Gross-net and net-net methods were applied for EFCS activities. According to the results, Brazil, Indonesia, and the Democratic Republic of Congo have more potential to get positive incentives through RED, while China, Chile, and the Republic of Korea have more potential to get positive incentives through EFCS. This study suggests including both RED and EFCS activities in the boundary of policy approaches and endowment of positive incentives to consider GHG reduction potentials in the global scale and equity among developing countries. Making a discount rate application of forest management activities can be also recommended to factor out the effects of human-induced activities by EFCS activities.

• Journal of Energy Engineering
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• v.21 no.1
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• pp.33-42
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• 2012

In this study, long-term greenhouse gas reductions expected passenger sector was used for the MESSAGE. Green Car road map proposed BAU scenario, Enhanced diffusion green car scenario, and price 1, 2 scenarios was configured with four scenarios. Enhanced diffusion green car in the scenario, in 2050 compared to BAU scenario 13% of the emissions will decrease. Price 1 and Price 2 scenario is emissions reduction of 14% compared to BAU. This study consists of six chapters. Introduction of MESSAGE, creation and RES in the year and the target year set a different base line and the passenger building materials sector activities, steps for passenger sector scenario and Based on the results of running the emissions reductions were to describe.

• Journal of the Korean Society of Marine Environment & Safety
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• v.16 no.2
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• pp.229-234
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• 2010

Recently, nations around the world are putting various efforts in many aspects to decrease greenhouse gases and international cooperation is urgently required. As part of these efforts, the shipping industry is working towords establishing "green parts" that reduce the carbon content of the greenhouse gases emitted in ports and can also decrease the operating costs. This study has tried to look for how to supply shore power instead of suppling ship's own generated power as a basic researches for reduction of carbon emissions and construction of "green parts" system. And in this paper, the training ship 'SAENURI' of Mokpo Maritime University under actual operation was selected to investigate for environmental and expense effects. The results of this study showed that $CO_2$ emissions Mere reduced 34% and operating costs Mere reduced approximately 31% in case of using the shore paper.

• Korean Chemical Engineering Research
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• v.60 no.4
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• pp.478-485
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• 2022

The certification performance issued through an external business is sold to companies subject to the emission trading system allocation, and the company subject to the allocation can secure the quota by converting the purchased external business certification performance into offset credits. In this methodology, when fossil fuels that used existing oil boilers (by oil type) were replaced with boilers using propane gas with a relatively low carbon content, the amount of carbon dioxide emission reduction by oil type was recognized. As an initial analysis to make up for the insufficient quota of large corporations, the amount of carbon reduction emissions and emission rights trading was calculated.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.440-440
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• 2012

본 연구에서는 수질관리 및 기후변화(온실가스 저감) 등에 부응할 수 있는 SRI 벼재배 방법을 국내 논에 적용하여 농업비점오염원과 온실가스 저감효과를 측정하고 비교하여 SRI의 환경개선효과를 평가하고자 하였다. 시험포는 대조구인 상시담수처리구(관행, 재식거리 $30{\times}15cm$)와 SRI 물관리 처리구로 조성하였다. 각 시험포에는 관개배수시설 및 관개량을 측정할 수 있는 수도계량기, 유출량 측정을 위한 플륨 및 수위계 그리고 온실가스(메탄 및 이산화질소)를 측정하기 위한 아크릴재질의 Chamber를 설치하였다. 관행 및 SRI 시험포에 이앙할 모의 재배품종으로 오대벼를 공시하고 모든 시험포의 경우 1주당 3-5본씩 기계이앙을 실시하였으며, 물관리를 제외한 시비와 제초 등의 영농관리는 동일하게 수행하였다. 메탄($CH_4$)과 아산화질소($N_2O$)는 주 2회, 오전 9시 12시에 60 mL 주사기로 주기적으로 시료를 채취하여 GC로 분석하였다. 그리고 관개기간동안 관개량, 강우량 그리고 강우 유출량을 측정하고 수질시료를 채취하여 오염부하를 산정하였다. SRI 시험포의 SS, $COD_{Cr}$, $COD_{Mn}$, BOD, TN, TP의 총 오염부하량은 각각 583 kg/ha, 210.8 kg/ha, 70.1 kg/ha, 30.7 kg/ha, 56.1 kg/ha, 3.55 kg/ha로서 관행 시험포의 오염부하량에 비해 27.1~46.0%의 오염물질 저감 효과를 보였다. 그리고 각 시험포별 온실가스 메탄과 아산화질소의 총 배출량을 지구온난화잠재력(GWP)으로 환산하여 이산화탄소($CO_2$) 기준으로 산정한 결과, 관행은 14.2 톤/ha 그리고 SRI 물관리 처리구 4.0 톤/ha로 관행 대비 SRI 처리구에서 71.8%의 온실가스 감축효과를 나타내었다. 따라서 SRI 벼재배기술은 논 비점오염부하 및 온실가스 저감을 위한 효과적인 최적영농관리방법인 것으로 판단된다.

• Environmental and Resource Economics Review
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• v.24 no.1
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• pp.189-224
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• 2015

To meet sectoral emission target by 2020 and prepare for the emission trading scheme from 2015, decomposition analysis of energy consumption and GHG emission is required by 18 subsectors in industry sector where emission targets are established. Log Mean Divisia Index decomposition method was used to analyze factors' effects on energy and emission in the industry sector and by 18 subsectors from 2004 to 2011. Industrial energy consumption was increased due to the production effect and energy intensity effect. However structure effect contributes to the decrease of energy consumption. In terms of emissions (including indirect emission due to electricity consumption) in the industry sector, only structure effect contributed to the emission reduction. Factors' effects by subsectors were different. Cement industry, which is included at Nonmetal shows different results from those of Nonmetal industry and machinery industry, which is a subsector of Fabricated Metal, was also similar. In this regard, we should not apply the policy implications from decomposition analysis of aggregated industry such as Nonmetal or Fabricated Metal to its subsectors uniformly and develop a differentiated policy for each subsector industry.