A public lecture will be given on Monday, 27 February 2017, addressing developments in mineral dust modelling, concentrating on northern and southern desert areas, recent results and ongoing research works in the area of atmospheric mineral dust.
Atmospheric mineral dust is produced by Aeolian (sand) erosion in arid and semiarid areas. Surface-Atmosphere interactions control the occurrence and the intensity of dust emissions. Radiative and bio-chemical impacts of sporadic but intense dust storms on the environment differ from those of frequent but less intense events. Mineral dust also represents a risk for human health and activities in regions neighbouring deserts. To quantify these impacts, the regional spatio-temporal variability of dust emissions, atmospheric concentrations, and depositions has to be jointly measured, observed and modelled with adapted sub-daily and fine spatial resolutions.
Besides in-situ measurement campaigns, regional model systems are developed to simulate dust storms. These models allow describing the spatio-temporal evolution of dust events by comparisons with in-situ measurements, network observations and satellite dust products. The representations of dust emissions and dust size distribution in the models are crucial points to correctly simulate the atmospheric dust mass and deposition as well as to estimate dust optical thickness.
Date: Monday 27 February 2017
Venue: Engineering Auditorium
Ms Taimi Angula
T: +264 61 207 2342