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The Visibility of Airborne Volcanic Ash from the Flight Deck of an Aircraft – The Effect of Clouds in the Field of View

Sauer , Daniel and Gasteiger, Josef and Emde, Claudia and Buras, Robert and Mayer, Bernhard and Weinzierl, Bernadett (2013) The Visibility of Airborne Volcanic Ash from the Flight Deck of an Aircraft – The Effect of Clouds in the Field of View. AIP Conference Proceedings, 1531, pp. 63-66. American Institute of Physics (AIP). DOI: 10.1063/1.4804708 ISSN 0094-243X

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Official URL: http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4804708

Abstract

In April 2010, the volcanic ash cloud from the Eyjafjalla volcano in Iceland strongly impacted aviation in Europe. Several other incidents in the past have shown that volcanic ash can have severe consequences on aviation. One operational necessity is, therefore, to determine whether a pilot has the means to avoid flying through potentially dangerous volcanic ash just by visual observation of the sky from the cockpit of an aircraft. Here we investigate how clouds affect the visibility of a volcanic ash aerosol layer for an observer in the cockpit of an aircraft using a 3D Monte Carlo radiative transfer model MYSTIC. This study builds on the results of a previous study on the visibility of airborne volcanic ash in Weinzierl et al. (2012) where we considered the cloud-free case. With clouds, the discernibility of ash layers is substantially reduced. Even layers with comparably high mass concentrations of 2 mg m−3 might not be visible for uninformed observers.

Item URL in elib:https://elib.dlr.de/85423/
Document Type:Article
Title:The Visibility of Airborne Volcanic Ash from the Flight Deck of an Aircraft – The Effect of Clouds in the Field of View
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sauer , DanielLMU München, DLR-IPAUNSPECIFIED
Gasteiger, JosefLMU, MünchenUNSPECIFIED
Emde, ClaudiaLMU, MünchenUNSPECIFIED
Buras, RobertLMU, MünchenUNSPECIFIED
Mayer, BernhardLMU, MünchenUNSPECIFIED
Weinzierl, Bernadett DLR, IPAUNSPECIFIED
Date:2013
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:1531
DOI :10.1063/1.4804708
Page Range:pp. 63-66
Publisher:American Institute of Physics (AIP)
ISSN:0094-243X
Status:Published
Keywords:Monte Carlo methods, clouds, aircraft, aerosols, volcanology, atmospheric techniques, radiative transfer
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Ziegele, Brigitte
Deposited On:19 Nov 2013 12:49
Last Modified:08 Mar 2018 18:19

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