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Eco-efficient flight trajectories - Using a Lagrangian approach in EMAC to investigate contrail formation in the mid latitudes

Peter, Patrick and Matthes, Sigrun and Frömming, Christine and Grewe, Volker (2022) Eco-efficient flight trajectories - Using a Lagrangian approach in EMAC to investigate contrail formation in the mid latitudes. DACH 2022, 21-25 März 2022, Leipzig, Deutschland.

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Abstract

Air transport has for a long time been linked to environmental issues like pollution, noise and climate change. While CO2 emissions are the main focus in public discussions, non-CO2 emissions of aviation may have a similar impact on the climate as aviation's carbon dioxide, e.g. contrail cirrus, nitrogen oxides or aviation induced cloudiness. While the effects of CO2 on climate are independent of location and situation during release, non-CO2 effects such as contrail formation vary depending on meteorological background. Previous studies investigated the influence of different weather situations on aviation’s climate change contribution, identifying climate sensitive regions and generating data products which enable air traffic management (ATM) to plan for climate optimized trajectories. The research presented here focuses on the further development of methods to determine the sensitivity of the atmosphere to aviation emissions with respect to climate effects in order to determine climate optimized aircraft trajectories. While previous studies focused on characterizing the North Atlantic Flight Corridor region, this study aims to extend the geographic scope by performing Lagrangian simulations in a global climate model EMAC for the northern hemispheric extratropical regions and tropical latitudes. This study addresses how realistically the physical conditions and processes for contrail formation and life cycle are represented in the upper troposphere and lower stratosphere by comparing them to airborne observations (HALO measurement campaign, CARIBIC/IAGOS scheduled flight measurements), examining key variables such as temperature or humidity. Direct comparison of model data with observations using clusters of data provides insight into the extent to which systematic biases exist that are relevant to the climate effects of contrails. We perform this comparison for different vertical resolutions to assess which vertical resolution in the EMAC model is well suited for studying contrail formation. Together with this model evaluation using aircraft measurements, the overall concept for studying the life cycle of contrails in the modular global climate model EMAC is introduced. Hereby, the concept for the development of a MET service that can be provided to ATM to evaluate contrail formation and its impact on the climate along planned aircraft trajectories is presented. Within the ClimOP collaborative project, we can investigate which physical processes determine the effects of contrails on climate and study their spatial and temporal variation. In addition, these climate change functions enable case studies that assess the impact of contrails on climate along trajectories and use alternative trajectories that avoid these regions of the atmosphere that have the potential to form contrails with a large radiative effect. This study is part of the ClimOP project and has received funding from European Union’s Horizon

Item URL in elib:https://elib.dlr.de/186045/
Document Type:Conference or Workshop Item (Poster)
Title:Eco-efficient flight trajectories - Using a Lagrangian approach in EMAC to investigate contrail formation in the mid latitudes
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Peter, PatrickDLR, IPAhttps://orcid.org/0000-0002-2713-0230
Matthes, SigrunDLR, IPAhttps://orcid.org/0000-0002-5114-2418
Frömming, ChristineDLR, IPAhttps://orcid.org/0000-0001-5516-7180
Grewe, VolkerDLR, IPAhttps://orcid.org/0000-0002-8012-6783
Date:23 March 2022
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Contrail, Lagrange, EMAC, flight trajectories, ClimOP
Event Title:DACH 2022
Event Location:Leipzig, Deutschland
Event Type:national Conference
Event Dates:21-25 März 2022
Organizer:Deutsche Meteorologische Gesellschaft
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Air Transportation and Impact
DLR - Research area:Aeronautics
DLR - Program:L AI - Air Transportation and Impact
DLR - Research theme (Project):L - Climate, Weather and Environment, L - Integrated Flight Guidance, L - Air Transport Operations and Impact Assessment, R - Model systems
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Peter, Patrick
Deposited On:06 Apr 2022 06:35
Last Modified:06 Apr 2022 06:35

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