Table 1 Overview of the performance of the analysed climate metrics with respect to each requirement

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

Requirement

Neutrality (REQ 1)

Stability (REQ 2)

Compatibility (REQ 3)

Simplicity (REQ 4)

RF

Very low neutrality

Generally stable

Compatible

Simple to understand and implement

GWP

Low, but consistent neutrality

Stable

Compatible (standard climate metric)

Complex to understand, simple to implement

EGWP

High neutrality

Stable

Compatible

Complex to understand and implement

GTP

Low, but inconsistent neutrality

Generally stable

Compatible

Simple to understand, complex to implement

ATR & iGTP

High neutrality

Stable

Compatible

Simple/complex to understand, complex to implement

GWP*

Low, but consistent neutrality

Highly unstable

Not compatible

Highly complex to understand and implement

EGWP*

High and consistent neutrality

Highly unstable

Not compatible

Highly complex to understand and implement

  1. “Generally stable” refers to the finding that the RF and GTP are stable for full aviation emission scenarios, but can struggle to show qualitatively the same response for pulse and constant emissions (see e.g., ref. 50, their Fig. 3.3).
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