Urbanek, Benedikt and Groß, Silke and Wirth, Martin and Rolf, Christian and Krämer, Martina and Voigt, Christiane (2018) High Depolarization Ratios of Naturally Occurring Cirrus Clouds Near Air Traffic Regions Over Europe. Geophysical Research Letters, 45 (23), pp. 13166-13172. Wiley. doi: 10.1029/2018GL079345. ISSN 0094-8276.
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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018GL079345
Abstract
Abstract Cirrus clouds have a large influence on the Earth's climate and anthropogenic activities such as aviation can alter their properties. Besides the formation of contrails, indirect effects on naturally occurring cirrus like increased heterogeneous freezing due to exhaust soot particles are discussed in the literature. However, hardly any observational study exists. In this work we present cirrus optical properties measured by an airborne lidar over Europe during the Midlatitude Cirrus experiment (ML-CIRRUS). One half of the cloud cases showed elevated depolarization ratios with a mode difference of 10 percentage points indicating differences in the clouds microphysical properties. Their origin can be traced back to highly frequented air traffic regions, and they show lower in-cloud ice supersaturations. Our analysis reveals no influence of embedded contrails and temperature. These results could be explained by an indirect aerosol effect where heterogeneous freezing is caused by aviation exhaust particles.
Item URL in elib: | https://elib.dlr.de/126304/ | ||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||
Title: | High Depolarization Ratios of Naturally Occurring Cirrus Clouds Near Air Traffic Regions Over Europe | ||||||||||||||||||||||||||||
Authors: |
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Date: | 10 December 2018 | ||||||||||||||||||||||||||||
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: | 45 | ||||||||||||||||||||||||||||
DOI: | 10.1029/2018GL079345 | ||||||||||||||||||||||||||||
Page Range: | pp. 13166-13172 | ||||||||||||||||||||||||||||
Publisher: | Wiley | ||||||||||||||||||||||||||||
ISSN: | 0094-8276 | ||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||
Keywords: | aerosol indirect effect on ice clouds | ||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||||||||||||
HGF - Program Themes: | Earth Observation | ||||||||||||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||||||||||||
DLR - Program: | R EO - Earth Observation | ||||||||||||||||||||||||||||
DLR - Research theme (Project): | R - Atmospheric and climate research | ||||||||||||||||||||||||||||
Location: | Oberpfaffenhofen | ||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics > Lidar Institute of Atmospheric Physics > Cloud Physics | ||||||||||||||||||||||||||||
Deposited By: | Urbanek, Benedikt | ||||||||||||||||||||||||||||
Deposited On: | 11 Feb 2019 07:18 | ||||||||||||||||||||||||||||
Last Modified: | 14 Nov 2023 07:59 |
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