Universität zu Köln

Klose, Martina ORCID: 0000-0001-8190-3700 and Shao, Yaping ORCID: 0000-0002-2041-5479 (2016). A numerical study on dust devils with implications to global dust budget estimates. Aeolian Res., 22. S. 47 - 59. OXFORD: ELSEVIER SCI LTD. ISSN 2212-1684

Full text not available from this repository.

Abstract

The estimates of the contribution of dust devils (DDs) to the global dust budget have large uncertainties because the dust emission mechanisms in DDs are not yet well understood. In this study, a large-eddy simulation model coupled with a dust scheme is used to investigate DD dust entrainment. DDs are identified from the simulations using various threshold values for pressure drop and vorticity in the DD center. A vortex-tracking algorithm is presented, which automatically detects and tracks vortices based on different pressure drop and vorticity criteria. The results show that DD dust lifting can be largely explained by convective turbulent dust emission. DD dust entrainment varies strongly between individual DDs even for similar atmospheric conditions, but the maximum emissions are determined by atmospheric stability. By relating DD emission and counts to the Richardson number, we propose a new and simple method to estimate regional and global DD dust transport. (C) 2016 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Klose, Martina UNSPECIFIED orcid.org/0000-0001-8190-3700 UNSPECIFIED Shao, Yaping UNSPECIFIED orcid.org/0000-0002-2041-5479 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-263707
DOI:	10.1016/j.aeolia.2016.05.003
Journal or Publication Title:	Aeolian Res.
Volume:	22
Page Range:	S. 47 - 59
Date:	2016
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	2212-1684
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LARGE-EDDY SIMULATION; NEW-MEXICO; EMISSION; PARAMETERIZATION; FREQUENCY; PLUMES; RANGE Multiple languages Geography, Physical Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26370