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Turbulence Analysis in Long-Range-Transported Saharan Dust Layers With Airborne Lidar

Gutleben, Manuel and Groß, Silke Martha (2021) Turbulence Analysis in Long-Range-Transported Saharan Dust Layers With Airborne Lidar. Geophysical Research Letters, 48 (18), e2021GL094418. Wiley. doi: 10.1029/2021GL094418. ISSN 0094-8276.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021GL094418

Abstract

Abstract In this study, turbulent properties of long-range-transported Saharan dust layers are investigated for the first time using airborne backscatter and water vapor lidar measurements. This is achieved via the utilization of spectral signal decomposition to the collected lidar data. Additionally, measurements by dropsondes are analyzed in detail. The presented measurements were conducted during the Next-Generation Aircraft Remote Sensing for Validation Studies II in boreal summer 2016 upstream Barbados. An analysis of two case studies shows that the derived mesoscale turbulence cascades inside the transported dust layers follow the predicted slopes for turbulence of -5/3. The turbulent nature of the Saharan air layers (SALs) is additionally indicated by small Richardson numbers, which are derived from data collected by launched dropsondes. These presented results also fortify the hypothesis that turbulence inside dust layers helps to keep large mineral dust particles aloft for a longer time, so that they can still be found after long-range transport.

Item URL in elib:https://elib.dlr.de/144020/
Document Type:Article
Title:Turbulence Analysis in Long-Range-Transported Saharan Dust Layers With Airborne Lidar
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Gutleben, ManuelDLR, IPAhttps://orcid.org/0000-0002-1515-6193UNSPECIFIED
Groß, Silke MarthaDLR, IPAhttps://orcid.org/0000-0002-7467-9269UNSPECIFIED
Date:August 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:10.1029/2021GL094418
Page Range:e2021GL094418
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:lidar, Saharan Air Layer, mineral dust, turbulence
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 - LIDAR research and development
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Gutleben, Manuel
Deposited On:30 Sep 2021 14:52
Last Modified:30 Sep 2021 14:52

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