Pressure for aviation to have to include its non-CO2 climate…

pressure-for-aviation-to-have-to-include-its-non-co2-climate…

Pressure for aviation to have to include its non-CO2 climate…

Pressure for aviation to have to include its non-CO2 climate impacts of its emissions
2022-10-28 11:01:00
The lack of scientific clarity on the impact of its non-CO2 effects is a risk for commercial aviation, as it starts to take steps to address the problem of its carbon emissions and their climate impact. There is an aspirational target by the ICAO for the commercial air travel sector to reach “net-zero CO2 emissions by 2050”.  The exact meaning of net-zero is never clear, or how genuinely the emissions will be removed. But that ignores the other problem aviation has, which is the non-CO2 impacts of its emissions at high altitude. These are various gases, including nitrogen oxides (NOx) and also contrails. Studies indicate that these may double, or even triple, the climate warming impact of the plane’s CO2 alone. The science is complicated, and the impacts are different at different times of day, in different weather conditions, in different places, and different durations of effects. However, it is convenient for the industry to continue hiding behind claims that the science is uncertain, as the reality would be a real handicap for their future plans. Tim Johnson, of the Aviation Environment Federation (AEF) said though ICAO has refused to address non-CO2 impacts yet, this will become imperative between now and 2050 (at the very latest). .Tweet   Lack of clarity on aviation’s non-CO2 effects ‘creates risk’ in net-zero push By Lewis Harper (Flight Global) 20 October 2022 The lack of scientific clarity on the impact of non-CO2 effects is a risk for commercial aviation as it seeks to address its environmental footprint, according to speakers at the Aviation Carbon 2022 conference in London on 17 October. Citing the now widely adopted target for commercial aviation to reach net-zero CO2 emissions by 2050 – which was rubber-stamped at a governmental level during the recent ICAO assembly via agreement on a long-term aspirational goal (LTAG) – speakers cautioned that factors such as nitrogen oxides (NOx) and contrails might eventually draw more focus, should scientists suggest with confidence that they have a significant warming impact. “When we look at these [net-zero] roadmaps we’re mostly focusing on the CO2 effect and largely leaving out the non-CO2 effects,” says Siyi Hao, a sustainable aviation specialist at consultancy Roland Berger. He describes this as a “potential risk for our planning”, despite there being good reason for the lack of commitment on the issue so far, given that “we don’t really have a perfect scientific understanding of it”. That is because achieving better scientific understand

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