The Open UniversitySkip to content
 

Martian mesoscale and microscale wind variability of relevance for dust lifting

Spiga, Aymeric and Lewis, Stephen R. (2010). Martian mesoscale and microscale wind variability of relevance for dust lifting. Mars, 5 pp. 146–158.

Full text available as:
[img] PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (3MB)
DOI (Digital Object Identifier) Link: https://doi.org/10.1555/mars.2010.0006
Google Scholar: Look up in Google Scholar

Abstract

Background: Mars si both a windy and dusty environment. Ariborne dust is a crucial climate component on Mars. It impacts atmospheric circulations at large-, meso- and micro-scales, which in turn control dust lifting from the surface and transport in the atmosphere. Dust lifting processes and feedbacks on atmospheric circulations are currently not well understood.
Method: Our purpose is to show how mesoscale models and large-eddy simulations help to explore small-scale circulation patterns which are potentially important for lifting dust into the atmosphere but which are unresolved by global climate models. We focus on variations of friction velocity, u*, relevant for dust lifting, in particular investigating maximum values and the spatial and temporal variability of u*.
Conclusion: Meteorological scales between 100 km and 10 km can be studied by high-resolution global circulation and limited-area mesoscale models, which both show strong topographic control of the daytime and nighttime near-surface winds. Scales below 10 km and 1 km are dominated by turbulent gusts and dust devils, two distinct convective boundary layer processes likely to lift dust from the surface. In low-latitude regions, boundary layer depth and friction velocity u* are correlated with surface altimetry. Further studies will be carried out to parameterize lifting by boundary layer processes and dust radiative effects once transported in the atmosphere.

Item Type: Journal Item
Copyright Holders: 2010 The Authors
ISSN: 1548-1921
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Space
Item ID: 25467
Depositing User: Stephen Lewis
Date Deposited: 15 Dec 2010 11:29
Last Modified: 10 Dec 2018 10:56
URI: http://oro.open.ac.uk/id/eprint/25467
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU