Universität zu Köln

Liu, Dongwei ORCID: 0000-0002-1213-6795, Ishizuka, Masahide ORCID: 0000-0001-9296-4103, Mikami, Masao and Shao, Yaping ORCID: 0000-0002-2041-5479 (2018). Turbulent characteristics of saltation and uncertainty of saltation model parameters. Atmos. Chem. Phys., 18 (10). S. 7595 - 7607. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1680-7324

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Abstract

It is widely recognised that saltation is a turbulent process, similar to other transport processes in the atmospheric boundary layer. Due to a lack of high-frequency observations, the statistic behaviour of saltation is so far not well understood. In this study, we use the data from the Japan-Australia Dust Experiment (JADE) to investigate the turbulent characteristics of saltation by analysing the probability density function, energy spectrum and intermittency of saltation fluxes. Threshold friction velocity, u(*t), and saltation coefficient, c(0), are two important parameters in saltation models often assumed to be deterministic. As saltation is turbulent in nature, we argue that it is more reasonable to consider them as parameters obeying certain probability distributions. We estimate these distributions using the JADE data. The factors contributing to the stochasticity of u(*t) and c(0) are examined.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Liu, Dongwei UNSPECIFIED orcid.org/0000-0002-1213-6795 UNSPECIFIED Ishizuka, Masahide UNSPECIFIED orcid.org/0000-0001-9296-4103 UNSPECIFIED Mikami, Masao UNSPECIFIED UNSPECIFIED UNSPECIFIED Shao, Yaping UNSPECIFIED orcid.org/0000-0002-2041-5479 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-185879
DOI:	10.5194/acp-18-7595-2018
Journal or Publication Title:	Atmos. Chem. Phys.
Volume:	18
Number:	10
Page Range:	S. 7595 - 7607
Date:	2018
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	1680-7324
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Institute for Geophysics and Meteorology
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language THRESHOLD FRICTION VELOCITY; WIND EROSION THRESHOLD; SHEAR VELOCITY; DIFFERENTIAL EVOLUTION; SEDIMENT TRANSPORT; VARIABILITY; INTERMITTENCY; SIMULATION; FIELD; FLUX Multiple languages Environmental Sciences; Meteorology & Atmospheric Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/18587