能源规划是否符合气候目标?评估拉丁美洲和加勒比地区发电厂未来的排放量

IF 5.8 Q2 ENERGY & FUELS
Catalina Marinkovic , Adrien Vogt-Schilb
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引用次数: 0

摘要

十个拉丁美洲和加勒比国家已承诺自 2019 年起实现碳中和。我们将评估该地区的电力规划是否已朝着实现这一目标的方向发展。我们将 2023 年的发电能力与 2019 年公布的计划进行了比较。然后,我们估算了现有和规划中发电厂的承诺排放量--这些发电厂在其典型使用寿命内正常运行所产生的排放量--并将其与政府间气候变化专门委员会(IPCC)公布的情景下的发电排放量进行比较。我们发现,自 2019 年以来,化石燃料的规划发电量减少了 47%,而规划的可再生能源发电厂则增加了 24%。净零承诺的国家倾向于取消更多的化石燃料发电能力。但是,该地区现有电厂在其生命周期内将排放 6.7 千兆吨二氧化碳,如果所有规划的化石燃料电厂都建成,则将增加 4.9 千兆吨二氧化碳。11.6 GtCO2 的总排放量超过了与 1.5 和 2 °C 一致的 IPCC 途径的碳预算中值(2.3 和 4.3 GtCO2)。天然气发电厂是现有排放量(62%)和计划排放量(75%)的最大贡献者。我们评估了实现碳预算的减排战略。假设没有新的煤电厂投产,已宣布的天然气和石油项目以与过去四年相同的速度被取消,所有化石燃料发电厂的寿命缩短 10 年,所有新的天然气取代现有的煤炭,则承诺的排放量将下降 67%,达到中位数 2 °C 预算,但仍低于中位数 1.5 °C 预算。虽然正在取得进展,但该地区的能源规划还不符合 IPCC 预测的全球气候目标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Is energy planning consistent with climate goals? Assessing future emissions from power plants in Latin America and the Caribbean

Ten Latin American and Caribbean countries have pledged to achieve carbon neutrality since 2019. We assess whether electricity planning in the region has evolved towards reaching this goal. We compare power generation capacity in 2023 with announced plans in 2019. We then estimate committed emissions from existing and planned power plants – emissions that would result from the normal operation of these plants during their typical lifetime – and compare them to emissions from power generation in published IPCC scenarios. We find that fossil fuel planned capacity has decreased by 47 % since 2019, compared to an increase of 24 % of planned renewable power plants. Countries with net-zero pledges tended to cancel more fossil fuel power capacity. But existing plants in the region will emit 6.7 GtCO2 during their lifespan, and if all planned fossil fuel plants are built, they will add 4.9 GtCO2. The total 11.6 GtCO2 emissions exceeds median carbon budgets for 1.5 and 2 °C-consistent IPCC pathways (2.3 and 4.3 GtCO2). Natural gas power plants are the largest contributor to existing (62 %) and planned (75 %) emissions. We evaluate emissions reduction strategies to achieve carbon budgets. Assuming no new coal plants come into operation, announced gas and oil projects are canceled at the same rate as in the past four years, all fossil fueled plant lifetimes are reduced by 10 years, and all new natural gas displaces existing coal, committed emissions fall by 67 %, meeting the median 2 °C budget, but still falling short of the median 1.5 °C budget. While progress is being made, energy planning in the region is not yet consistent with global climate goals as reflected by IPCC scenarios.

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来源期刊
Energy and climate change
Energy and climate change Global and Planetary Change, Renewable Energy, Sustainability and the Environment, Management, Monitoring, Policy and Law
CiteScore
7.90
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