Atmospheric forcing of the three-dimensional distribution of dust particles over Australia: A case study (2012)
Type of ContentJournal Article
PublisherAMER GEOPHYSICAL UNION
- Science: Journal Articles 
Knowledge of atmospheric processes responsible for horizontal and vertical distribution of dust particles is important for identifying their transport pathways. The Weather Research and Forecasting with Chemistry (WRF/Chem) model, complemented by observations, was used to simulate and observe the three-dimensional distribution of Australian dust for a severe dust event during 22-23 September 2009. The passage of a cold front modified the boundary layer structure during this event, allowing dust to be lifted and subsequently transported for a significant distance. The model simulated the maximum dust concentrations to be located behind the cold front as a result of strong post-frontal wind speeds. The boundary layer depths were also shown to be significantly deeper behind the cold front where dust particles could be lifted to the top of the boundary layer by turbulent fluxes associated with strong mixing. However, dust was predicted to reach its maximum height ahead of the cold front as a result of lifting in the warm conveyor belt. Both Moderate Resolution Imaging Spectroradiometer (MODIS) data and the WRF/Chem model results for this event highlight two transport pathways of dust: southeastward to the Tasman Sea and northward toward tropical regions of Australia. The vertical distribution of dust from Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) satellite data and cross-sectional analysis of the model results indicate that significant amounts of dust aerosols were transported over the Tasman Sea toward New Zealand within the lower atmosphere. Copyright 2012 by the American Geophysical Union.
CitationAlizadeh Choobari O, Zawar-Reza P, Sturman AP (2012). Atmospheric forcing of the three-dimensional distribution of dust particles over Australia: A case study. Journal of Geophysical Research. 117(D11206). 19pp-.
This citation is automatically generated and may be unreliable. Use as a guide only.
KeywordsScience & Technology; Physical Sciences; Meteorology & Atmospheric Sciences; GEOSCIENCES, MULTIDISCIPLINARY; BOUNDARY-LAYER; MODEL; AEROSOL; TRANSPORT; IMPACT; PARAMETERIZATION; IMPLEMENTATION; CLIMATE; STORM
ANZSRC Fields of Research37 - Earth sciences::3701 - Atmospheric sciences::370103 - Atmospheric aerosols
37 - Earth sciences::3701 - Atmospheric sciences::370108 - Meteorology
Showing items related by title, author, creator and subject.
Simulation of the spatial distribution of mineral dust and its direct radiative forcing over Australia Alizadeh Choobari O; Zawar-Reza P; Sturman AP (CO-ACTION PUBLISHING, 2013)Direct radiative forcing by mineral dust is important as it significantly affects the climate system by scattering and absorbing short-wave and long-wave radiation. The multi-angle imaging spectro radiometer (MISR) and ...
Low level jet intensification by mineral dust aerosols Alizadeh Choobari O; Zawar-Reza P; Sturman AP (COPERNICUS GESELLSCHAFT MBH, 2013)Modification of the intensity of a low level jet (LLJ) and near-surface wind speed by mineral dust is important as it has implications for dust emission and its long-range transport. Using the Weather Research and Forecasting ...
Fire weather of a Canterbury Northwester on 6 February 2011 in South Island, New Zealand Simpson C; Sturman A; Zawar–Reza P; Pearce G (2013)Foehn winds, known locally as the "Canterbury Northwester", occurred on 6 February 2011 and were associated with extreme fire weather in the lee of the Southern Alps and across the eastern South Island of New Zealand. A ...