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:	T. Bräuer, C. Voigt, D. Sauer, S. Kaufmann, V. Hahn, M. Scheibe, H. Schlager, F. Huber, P. Le Clercq, R. H. Moore, B. E. Anderson
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/58378ba4fc74449286ce39a3473bf27e
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spelling	oai:doaj.org-article:58378ba4fc74449286ce39a3473bf27e2021-11-19T06:37:15ZReduced ice number concentrations in contrails from low-aromatic biofuel blends10.5194/acp-21-16817-20211680-73161680-7324https://doaj.org/article/58378ba4fc74449286ce39a3473bf27e2021-11-01T00:00:00Zhttps://acp.copernicus.org/articles/21/16817/2021/acp-21-16817-2021.pdfhttps://doaj.org/toc/1680-7316https://doaj.org/toc/1680-7324<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>T. BräuerC. VoigtC. VoigtD. SauerS. KaufmannV. HahnM. ScheibeH. SchlagerF. HuberF. HuberP. Le ClercqR. H. MooreB. E. AndersonCopernicus PublicationsarticlePhysicsQC1-999ChemistryQD1-999ENAtmospheric Chemistry and Physics, Vol 21, Pp 16817-16826 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Chemistry QD1-999
spellingShingle	Physics QC1-999 Chemistry QD1-999 T. Bräuer C. Voigt C. Voigt D. Sauer S. Kaufmann V. Hahn M. Scheibe H. Schlager F. Huber F. Huber P. Le Clercq R. H. Moore B. E. Anderson Reduced ice number concentrations in contrails from low-aromatic biofuel blends
description	<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>
format	article
author	T. Bräuer C. Voigt C. Voigt D. Sauer S. Kaufmann V. Hahn M. Scheibe H. Schlager F. Huber F. Huber P. Le Clercq R. H. Moore B. E. Anderson
author_facet	T. Bräuer C. Voigt C. Voigt D. Sauer S. Kaufmann V. Hahn M. Scheibe H. Schlager F. Huber F. Huber P. Le Clercq R. H. Moore B. E. Anderson
author_sort	T. Bräuer
title	Reduced ice number concentrations in contrails from low-aromatic biofuel blends
title_short	Reduced ice number concentrations in contrails from low-aromatic biofuel blends
title_full	Reduced ice number concentrations in contrails from low-aromatic biofuel blends
title_fullStr	Reduced ice number concentrations in contrails from low-aromatic biofuel blends
title_full_unstemmed	Reduced ice number concentrations in contrails from low-aromatic biofuel blends
title_sort	reduced ice number concentrations in contrails from low-aromatic biofuel blends
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/58378ba4fc74449286ce39a3473bf27e
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Reduced ice number concentrations in contrails from low-aromatic biofuel blends

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