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Maruhashi, J. (author), Mertens, Mariano (author), Grewe, V. (author), Dedoussi, I.C. (author)Aviation’s contribution to anthropogenic global warming is estimated to be between 3 – 5% [1]. This assessment comprises two contributions: the well understood atmospheric impact of carbon dioxide (CO2) and the more uncertain non-CO2 effects. The latter pertain to persistent contrails and pollutants like nitrogen oxides (NOx), water vapor (H2O),...abstract 2023
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Noorafza, M. (author), Santos, Bruno F. (author), Sharpanskykh, Alexei (author), Zengerling, Zarah L. (author), Weder, Christian M. (author), Linke, Florian (author), Grewe, V. (author)The aviation industry has set an ambitious goal of reducing its climate impacts. Accordingly, airlines must balance their plans according to this goal with financial considerations. We developed a multi-objective framework to facilitate climate-aware network design by incorporating the objective to minimise the flight average temperature...journal article 2023
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Dahlmann, K. (author), Grewe, V. (author), Matthes, S. (author), Yamashita, H. (author)Climate impact of anthropogenic activities is more and more of public concern. But while CO<sub>2</sub> emissions are accounted in emissions trading and mitigation plans, emissions of non-CO<sub>2</sub> components contributing to climate change receive much less attention. One of the anthropogenic emission sectors, where non-CO<sub>2</sub>...journal article 2022
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Radhakrishnan, Kaushik (author), Deck, K.T. (author), Proesmans, P. (author), Linke, Florian (author), Yin, F. (author), Grewe, V. (author), Vos, Roelof (author), Lührs, Benjamin (author), Niklaβ, Malte (author), Dedoussi, I.C. (author)The aircraft’s environmental performance on fleet level is so far completely decoupled from the design process. The climate impact from aviation arising from non-CO2 effects are largely independent from CO2 emissions, but rather depend on the atmospheric state. Previously complex climate-chemistry models were used to evaluate the non-CO2...conference paper 2022
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Simorgh, Abolfazl (author), Soler, Manuel (author), González-Arribas, Daniel (author), Matthes, Sigrun (author), Grewe, V. (author), Dietmüller, Simone (author), Baumann, Sabine (author), Yin, F. (author), Castino, F. (author)The strong growth rate of the aviation industry in recent years has created significant challenges in terms of environmental impact. Air traffic contributes to climate change through the emission of carbon dioxide (CO<sub>2</sub>) and other non-CO<sub>2</sub> effects, and the associated climate impact is expected to soar further. The...review 2022
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Rao, P.V. (author), Yin, F. (author), Grewe, V. (author), Yamashita, Hiroshi (author), Jöckel, Patrick (author), Matthes, Sigrun (author), Mertens, Mariano (author), Frömming, Christine (author)One possibility to reduce the climate impact of aviation is the avoidance of climate-sensitive regions, which is synonymous with climate-optimised flight planning. Those regions can be identified by algorithmic Climate Change Functions (aCCFs) for nitrogen oxides (NOx), water vapour (H2O) as well as contrail cirrus, which provide a measure of...journal article 2022
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Yamashita, Hiroshi (author), Yin, F. (author), Grewe, V. (author), Jöckel, Patrick (author), Matthes, Sigrun (author), Kern, Bastian (author), Dahlmann, Katrin (author), Frömming, Christine (author)Climate-optimized routing is an operational measure to effectively reduce the climate impact of aviation with a slight increase in aircraft operating costs. This study examined variations in the flight characteristics among five aircraft routing strategies and discusses several characteristics of those routing strategies concerning typical...journal article 2021
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Lührs, Benjamin (author), Linke, Florian (author), Matthes, Sigrun (author), Grewe, V. (author), Yin, F. (author)Air traffic contributes to anthropogenic global warming by about 5% due to CO<sub>2</sub> emissions and non-CO<sub>2</sub> effects, which are primarily caused by the emission of NO<sub>x</sub> and water vapor as well as the formation of contrails. Since-in the long term-the aviation industry is expected to maintain its trend to grow,...journal article 2021
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Matthes, Sigrun (author), Lim, Ling (author), Burkhardt, Ulrike (author), Dahlmann, Katrin (author), Dietmüller, Simone (author), Grewe, V. (author), Haslerud, Amund S. (author), Hendricks, Johannes (author), Owen, Bethan (author), Pitari, Giovanni (author), Righi, Mattia (author), Skowron, Agnieszka (author)Aviation is seeking for ways to reduce its climate impact caused by CO<sub>2</sub> emissions and non-CO<sub>2</sub> effects. Operational measures which change overall flight altitude have the potential to reduce climate impact of individual effects, comprising CO<sub>2</sub> but in particular non-CO<sub>2</sub> effects. We study the impact of...journal article 2021
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Marks, Tobias (author), Dahlmann, Katrin (author), Grewe, V. (author), Gollnick, Volker (author), Linke, Florian (author), Matthes, Sigrun (author), Stumpf, Eike (author), Swaid, Majed (author), Unterstrasser, Simon (author)The aerodynamic formation flight, which is also known as aircraft wake-surfing for efficiency (AWSE), enables aircraft to harvest the energy inherent in another aircraft’s wake vortex. As the thrust of the trailing aircraft can be reduced during cruise flight, the resulting benefit can be traded for longer flight time, larger range, less fuel...journal article 2021
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Linke, F. (author), Radhakrishnan, K. (author), Grewe, V. (author), Vos, Roelof (author), Niklaß, Malte (author), Lührs, B. (author), Yin, F. (author), Dedoussi, I.C. (author), Proesmans, P. (author), Deck, K.T. (author)Given the comparably high impact of aircraft emissions, especially their non-CO2 effects, on climate in the order of 5%, aviation stakeholders are required to act to reduce the warming effects of air traffic. Besides new operational procedures, like e.g. climate-optimized routing, this demands the development of completely new global-warming...abstract 2020
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Comparison of various aircraft routing strategies using the air traffic simulation model airtraf 2.0Yamashita, H. (author), Yin, F. (author), Grewe, V. (author), Jockel, P. (author), Matthes, Sigrun (author), Kern, Bastian (author), Dahlmann, K. (author), Frömming, C. (author)A climate-optimized routing is expected as an operational measure to reduce the climate impact of aviation, whereas this routing causes extra aircraft operating costs. This study performs some air traffic simulations of nine aircraft routing strategies which include the climate-optimized routing, and examines characteristics of those routings. A...abstract 2020
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Dahlmann, K. (author), Matthes, Sigrun (author), Yamashita, H. (author), Unterstrasser, S. (author), Grewe, V. (author), Marks, Tobias (author)An operational measure to aim for mitigation of aviation climate impact that is inspired by migrant birds is to fly in aerodynamic formation. This operational measure adapted to human aircraft would eventually save fuel and is, therefore, expected to reduce the climate impact of aviation. As this method changes beside the total emission also the...abstract 2020
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Dahlmann, Katrin (author), Matthes, Sigrun (author), Yamashita, Hiroshi (author), Unterstrasser, Simon (author), Grewe, V. (author), Marks, Tobias (author)An operational measure that is inspired by migrant birds aiming toward the mitigation of aviation climate impact is to fly in aerodynamic formation. When this operational measure is adapted to commercial aircraft it saves fuel and is, therefore, expected to reduce the climate impact of aviation. Besides the total emission amount, this...journal article 2020
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Matthes, Sigrun (author), Lührs, Benjamin (author), Dahlmann, Katrin (author), Grewe, V. (author), Linke, Florian (author), Yin, F. (author), Klingaman, Emma (author), Shine, Keith P. (author)Aviation can reduce its climate impact by controlling its CO<sub>2</sub>-emission and non-CO<sub>2</sub> effects, e.g., aviation-induced contrail-cirrus and ozone caused by nitrogen oxide emissions. One option is the implementation of operational measures that aim to avoid those atmospheric regions that are in particular sensitive to non-CO...journal article 2020
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van Manen, J. (author), Grewe, V. (author)Aviation contributes significantly to anthropogenic climate change, and one promising possibility for mitigation is eco-efficient flight planning by avoiding climate sensitive regions with only small changes in the aircraft trajectories. Climate sensitive regions result from strong spatial variation of the global climate impact of local non-CO2...journal article 2019
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Yin, F. (author), Grewe, V. (author), van Manen, J. (author), Matthes, Sigrun (author), Yamashita, Hiroshi (author), Linke, Florian (author), Lührs, Benjamin (author)For the first time, the algorithmic Climate Change Functions (aCCFs) for ozone, methane, water vapor, and persistent contrails have been developed within the ATM4E project to provide information on the climate sensitive regions, which can be conveniently implemented for the climate based flight routing. These aCCFs need to be verified before...conference paper 2018
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Grewe, V. (author), Bock, L. (author), Dahlmann, K. (author), Gierens, K. (author), Hüttenhofer, L. (author), Unterstrasser, S. (author), Gangoli Rao, A. (author), Bhat, A. (author), Yin, F. (author), Reichelt, T.G. (author), Paschereit, O. (author), Levy, Y. (author)Air traffic is important to our society and guarantees mobility especially for long distances. Air traffic is also contributing to climate warming via emissions of CO2 and various non-CO2 effects, such as contrail-cirrus or increase in ozone concentrations. Here we investigate the climate impact of a future aircraft design, a multi fuel blended...journal article 2017
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Grewe, V. (author), Linke, Florian (author)Air traffic guarantees mobility and serves the needs of society to travel over long distances in a decent time. But aviation also contributes to climate change. Here, we present various mitigation options, based on technological and operational measures and present a framework to compare the different mitigation options by taking into account...journal article 2017