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Effects of Optical Depth Variability on Contrail Radiative Forcing

Kärcher, Bernd and Burkhardt, Ulrike (2013) Effects of Optical Depth Variability on Contrail Radiative Forcing. Quarterly Journal of the Royal Meteorological Society, online (139), pp. 1658-1664. Wiley. DOI: 10.1002/qj.2053 ISSN 0035-9009

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/qj.2053/pdf

Abstract

Line-shaped contrails arising from aircraft emissions affect radiative forcing. The magnitude of the radiative forcing from contrails depends strongly on their optical depth and their spatial and temporal variability caused by dynamical and microphysical processes. Here we investigate the significance of this variability, both for modelling contrail radiative forcing and estimating thresholds for the detection of contrails in satellite imagery. Ignoring the variability of contrail optical depth in models by prescribing a mean optical depth may overestimate mean net radiative forcing by 10−20%. Undersampling of optically thin line-shaped contrails by passive satellite remote sensing is linked to the inability to detect flux changes in the outgoing long-wave radiation below ≈3Wm−2 for conditions over the eastern North Pacific. Consideration of these findings aids efforts to better quantify uncertainties in aviation climate assessments

Item URL in elib:https://elib.dlr.de/77376/
Document Type:Article
Title:Effects of Optical Depth Variability on Contrail Radiative Forcing
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kärcher, BerndPAUNSPECIFIED
Burkhardt, UlrikePAUNSPECIFIED
Date:2013
Journal or Publication Title:Quarterly Journal of the Royal Meteorological Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:online
DOI :10.1002/qj.2053
Page Range:pp. 1658-1664
Publisher:Wiley
ISSN:0035-9009
Status:Published
Keywords:aviation; aircraft emissions; contrails; radiative forcing; optical depth
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space, Aeronautics, Transport
HGF - Program Themes:Earth Observation, ATM and Operation (old), other
DLR - Research area:Raumfahrt, Aeronautics, Transport
DLR - Program:R EO - Erdbeobachtung, L AO - Air Traffic Management and Operation, V - no assignment
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung, L - Climate, Weather and Environment (old), V - no assignment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Kärcher, Prof. Bernd
Deposited On:24 Sep 2012 13:19
Last Modified:17 Jun 2019 11:46

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