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Concept of climate-charged airspaces: a potential policy instrument for internalizing aviation's climate impact of non-CO2 effects
Climate Policy ( IF 5.3 ) Pub Date : 2021-07-19 , DOI: 10.1080/14693062.2021.1950602
Malte Niklaß 1 , Volker Grewe 2, 3 , Volker Gollnick 1, 4 , Katrin Dahlmann 2
Affiliation  

ABSTRACT

Approximately 50–75% of aviation's climate impact is caused by non-CO2 effects, like the production of ozone and the formation of contrail cirrus clouds, which can be effectively prevented by re-routing flights around highly climate-sensitive areas. Here, we discuss options how to incentivize re-routing approaches and apply multicriteria trajectory optimizations to demonstrate the feasibility of the concept of climate-charged airspaces (CCAs). We show that although climate-optimized re-routing results in slightly longer flight times, increased fuel consumption and higher operating costs, it is more climate-friendly compared to a cost-optimized routing. In accordance to other studies, we find that the averaged temperature response over 100 years (ATR100) of a single flight can be reduced by up to 40%. However, if mitigation efforts are associated with a direct increase in costs, there is a need for climate policies. To address the lack of incentivizing airlines to internalize their climate costs, this study focuses on the CCA concept, which imposes a climate charge on airlines when operating in highly climate-sensitive areas. If CCAs are (partly) bypassed, both climate impact and operating costs of a flight can be reduced: a more climate-friendly routing becomes economically attractive. For an exemplary North-Atlantic network, CCAs create a financial incentive for climate mitigation, achieving on average more than 90% of the climate impact reduction potential of climate-optimized trajectories (theoretical maximum, benchmark).

Key policy insights

  • Existing climate policies for aviation do not address non-CO2 effects, which are very sensitive to the location and the timing of the emission.

  • By imposing a temporary climate charge for airlines that operate in highly climate-sensitive regions, the trade-off between economic viability and environmental compatibility could be resolved: Climate impact mitigation of non-CO2 effects coincides with cutting costs.

  • To ensure easy planning and verification, climate charges are calculated analogously to en-route and terminal charges. For climate mitigation it is therefore neither necessary to monitor emissions (CO2, NOx, etc.) nor to integrate complex non-CO2 effects into flight planning procedures of airlines.

  • Its implementation is feasible and effective.



中文翻译:

充满气候的空域的概念:一种潜在的政策工具,用于内化航空对非二氧化碳效应的气候影响

摘要

大约 50-75% 的航空气候影响是由非 CO 2效应引起的,例如臭氧的产生和轨迹卷云的形成,可以通过在高度气候敏感地区重新安排航班来有效地防止这种影响。在这里,我们讨论了如何激励重新路由方法和应用多标准轨迹优化的选项,以证明气候充电空域 (CCA) 概念的可行性。我们表明,尽管气候优化的改道会导致飞行时间稍长、燃油消耗增加和运营成本更高,但与成本优化的航线相比,它对气候更友好。根据其他研究,我们发现 100 年的平均温度响应 (ATR100) 的单次飞行最多可减少 40%。然而,如果减缓努力与成本的直接增加相关,则需要气候政策。为了解决缺乏激励航空公司将其气候成本内部化的问题,本研究侧重于 CCA 概念,该概念对在高度气候敏感地区运营的航空公司征收气候费用。如果(部分)绕过 CCA,则可以降低航班的气候影响和运营成本:更气候友好的航线在经济上具有吸引力。对于典型的北大西洋网络,CCA 为减缓气候变化提供财政激励,平均实现气候优化轨迹(理论最大值、基准)的气候影响减少潜力的 90% 以上。

关键政策见解

  • 现有的航空气候政策没有解决非C2 效应,它们对发射的位置和时间非常敏感。

  • 通过对在高度气候敏感地区运营的航空公司征收临时气候费用,可以解决经济可行性和环境兼容性之间的权衡问题:C2 效果与削减成本不谋而合。

  • 为确保轻松规划和验证,气候费用的计算类似于航路和终端费用。因此,对于减缓气候变化,既不需要监测排放(C2, NX等)也不能整合复杂的非C2 对航空公司飞行计划程序的影响。

  • 其实施是可行和有效的。

更新日期:2021-07-19
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