Reduced ice number concentrations in contrails from low-aromatic biofuel blends
<p>Sustainable aviation fuels can reduce contrail ice numbers and radiative forcing by contrail cirrus. We measured apparent ice emission indices for fuels with varying aromatic content at altitude ranges of 9.1–9.8 and 11.4–11.6 <span class="inline-formula">km</span>. Me...
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| Autores principales: | , , , , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Copernicus Publications
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/58378ba4fc74449286ce39a3473bf27e |
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| Sumario: | <p>Sustainable aviation fuels can reduce contrail ice numbers and radiative
forcing by contrail cirrus. We measured apparent ice emission indices for
fuels with varying aromatic content at altitude ranges of 9.1–9.8 and
11.4–11.6 <span class="inline-formula">km</span>. Measurement data were collected during the
ECLIF II/NDMAX flight experiment in January 2018. The fuels varied in both
aromatic quantity and type. Between a sustainable aviation fuel blend and a
reference fuel Jet A-1, a maximum reduction in apparent ice emission indices
of 40 <span class="inline-formula">%</span> was found. We show vertical ice number and extinction
distributions for three different fuels and calculate representative contrail
optical depths. Optical depths of contrails (0.5–3 <span class="inline-formula">min</span> in age) were
reduced by 40 <span class="inline-formula">%</span> to 52 <span class="inline-formula">%</span> for a sustainable aviation fuel
compared to the reference fuel. Our measurements suggest that sustainable
aviation fuels result in reduced ice particle numbers, extinction
coefficients, optical depth and climate impact from contrails.</p> |
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