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Alternative climate metrics to the Global Warming Potential are more suitable for assessing aviation non-CO₂ effects

Environmental Studies and Forestry

Alternative climate metrics to the Global Warming Potential are more suitable for assessing aviation non-CO₂ effects

L. Megill, K. Deck, et al.

Explore how aviation's impact on climate change goes beyond CO₂ emissions! This groundbreaking research by Liam Megill, Kathrin Deck, and Volker Grewe dives into alternative climate metrics and reveals that non-CO₂ effects could account for two-thirds of aviation's warming impact. Discover the potential of using Advanced Temperature Response and Efficacy-weighted GWP for assessing current and future aircraft fuel innovations.

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Playback language: English
Abstract
Aviation's contribution to climate change extends beyond CO₂ emissions, with non-CO₂ effects now estimated to account for roughly two-thirds of aviation's total warming impact. This paper explores alternative climate metrics to the Global Warming Potential (GWP), focusing on their neutrality, temporal stability, compatibility with existing policies, and simplicity. Using the AirClim model, the study analyzes several metrics, including Radiative Forcing (RF), GWP, Global Temperature Change Potential (GTP), Integrated GTP (IGTP), Average Temperature Response (ATR), and efficacy-weighted variants. The findings suggest that the ATR and Efficacy-weighted GWP (EGWP) offer more accurate assessments of current and future aircraft using novel fuels, compared to the widely used GWP.
Publisher
Communications Earth & Environment
Published On
May 10, 2024
Authors
Liam Megill, Kathrin Deck, Volker Grewe
Tags
aviation
climate change
emissions
alternative metrics
Global Warming Potential
Radiative Forcing
non-CO₂ effects
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