NARRATIVE SUMMARY Dust generated from the mechanical disturbance of granular material is known as " fugitive dust " since it is not released into the atmosphere in a restricted flow stream such as an exhaust pipe or smoke stack. Fugitive dust includes dust from unpaved roads, disturbed land in developed areas, agriculture, and undeveloped grazing land. Wind-blown and vehicle generated fugitive ...

Mineral dust deposition is suggested to be a significant atmospheric supply pathway of bioavailable iron (Fe) to Fe-depleted surface oceans. In this study, mineral dust and dissolved Fe (Fed) deposition rates are predicted for March 2009 to February 2010 using the 3-D chemical transport model GEOS-Chem implemented with a comprehensive dust-Fe dissolution scheme. The model simulates Fed producti...

[1] Wind-blown sand, or ‘saltation,’ creates sand dunes, erodes geological features, and could be a significant source of dust aerosols on Mars. Moreover, the electrification of sand and dust in saltation, dust storms, and dust devils could produce electric discharges and affect atmospheric chemistry. We present the first calculations of electric fields in martian saltation, using a numerical m...

[1] The processes that determine which areas are strong sources of mineral aerosols are not well known. In this study we consider the role of ephemeral lakes in modulating emissions of atmospheric mineral aerosols. We focus on two ephemeral lake regions that have been identified as source regions: the zone of Chotts in Tunisia and Algeria, and Etosha Pan in Namibia. Comparisons of satellite ret...

1) Using MODIS Terra Level 1B data containing calibrated and geolocated radiances, we investigated a regional signal of wind-blown mineral dust over the oceans. The goal of this study was to identify the thermal-IR radiative signature of atmospheric dust originating from the main world’s dust production regions and explore the implications to the dust detection over oceans with the techniques b...

The Aral Sea Basin is considered as a region with increased rates of atmospheric air pollution by aerosols of arid origin. It is conditioned by the aridity of the climate and the presence of a great number of natural sources of aerosols emission to the atmosphere. The average annual number of days with dust storms varies from 20 to 67, while the maximum reaches up to 108-146 days with dust stor...

Anthropogenic emissions completely overwhelmed natural marine lead (Pb) sources during the past century, predominantly due to leaded petrol usage. Here, based on Pb isotope measurements, we reassess the importance of natural and anthropogenic Pb sources to the tropical North Atlantic following the nearly complete global cessation of leaded petrol use. Significant proportions of up to 30-50% of ...

Relief of iron (Fe) limitation in the surface Southern Ocean has been suggested as one driver of the regular glacial-interglacial cycles in atmospheric carbon dioxide (CO2). The proposed cause is enhanced deposition of Fe-bearing atmospheric dust to the oceans during glacial intervals, with consequent effects on export production and the carbon cycle. However, understanding the role of enhanced...

Industrial activities and high traffic density are the most important heavy metal pollution sources in urban areas. Roadside dust created by atmospheric deposition can be one of the best indicators for heavy metal contamination levels. The present study reports the spatial distribution patterns and degree of heavy metal pollution (Cd, Cr, Ni, Pb, Zn, and As) in 50 roadside dust samples from urb...