The most abundant aerosol components present in the atmosphere are dust and sea salt (Andreae, 1995). Li et al. (1996) show that dust dominates the aerosol light-scattering over the tropical and sub-tropical Atlantic. Satellite retrievals also illustrate the importance of dust over large regions from arid deserts to remote oceanic regions downwind of West Africa, Asia and the Persian Gulf (Husar et al., 1997; Deuzé et al., 2000; Tanré et al., 2001). Furthermore, land modification, agricultural practices and the migration of desert fringes appear to have contributed to the increase in the dust transport over the Atlantic from the 1960s to the 1980s. These perturbations to the dust cycle brought by human activity are thought to account for 15 to 50% of the atmospheric dust load (Tegen and Fung, 1995; Tegen, personnal communication, 2002).
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Global Emissions of Mineral Aerosol: Formulation and Validation using Satellite Imagery
- Springer Netherlands