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Aviation contrail cirrus and radiative forcing over Europe during 6 months of COVID-19

Schumann, Ulrich and Bugliaro Goggia, Luca and Dörnbrack, Andreas and Baumann, Robert and Voigt, Christiane (2021) Aviation contrail cirrus and radiative forcing over Europe during 6 months of COVID-19. Geophysical Research Letters, 48, e2021GL092771. Wiley. doi: 10.1029/2021GL092771. ISSN 0094-8276.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL092771

Abstract

The COVID-19 pandemic led to a 72% reduction of air traffic over Europe in March-August 2020 compared to 2019. Modelled contrail cover declined similarly, and computed mean instantaneous radiative contrail forcing dropped regionally by up to 0.7 W m-2. Here, model predictions of cirrus optical thickness and the top-of-the atmosphere outgoing longwave and reflected shortwave irradiances are tested by comparison to Meteosat-SEVIRI-derived data. The agreement between observations and modelled data is slightly better when modelled contrail cirrus contributions are included. The spatial distributions and diurnal cycles of the differences in these data between 2019 and 2020 are partially caused by differences in atmospheric and surface conditions, particularly for solar radiation in the spring of 2020. Aviation signals become discernible in the observed differences of these data between 2019 and 2020 when subtracting numerical weather prediction model results that approximate the atmosphere and surface conditions without contrails.

Item URL in elib:https://elib.dlr.de/142048/
Document Type:Article
Title:Aviation contrail cirrus and radiative forcing over Europe during 6 months of COVID-19
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schumann, UlrichDLR, IPAhttps://orcid.org/0000-0001-5255-6869
Bugliaro Goggia, LucaDLR, IPAhttps://orcid.org/0000-0003-4793-0101
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216
Baumann, RobertDLR, IPAhttps://orcid.org/0000-0001-6611-5343
Voigt, ChristianeDLR, IPAhttps://orcid.org/0000-0001-8925-7731
Date:2021
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:48
DOI :10.1029/2021GL092771
Page Range:e2021GL092771
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:contrail aircraft climate observation model traffic Meteosat CoCiP
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, R - Atmospheric and climate research
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics > Cloud Physics
Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Schumann, Prof.Dr.habil. Ulrich
Deposited On:29 Apr 2021 12:05
Last Modified:29 Apr 2021 12:05

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