elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

High Depolarization Ratios of Naturally Occurring Cirrus Clouds Near Air Traffic Regions Over Europe

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), 13,166-13,172. Wiley. DOI: 10.1029/2018GL079345 ISSN 0094-8276

[img] PDF
754kB

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/
Document Type:Article
Title:High Depolarization Ratios of Naturally Occurring Cirrus Clouds Near Air Traffic Regions Over Europe
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Urbanek, BenediktDLR, IPAhttps://orcid.org/0000-0002-3576-740X
Groß, SilkeDLR, IPAUNSPECIFIED
Wirth, MartinDLR, IPAUNSPECIFIED
Rolf, ChristianFZ JülichUNSPECIFIED
Krämer, MartinaFZ JülichUNSPECIFIED
Voigt, ChristianeDLR, IPAhttps://orcid.org/0000-0001-8925-7731
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:13,166-13,172
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 - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
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:23 Feb 2019 00:23

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.