The Chemical and Physical Properties of Marine Aerosols: An Introduction

Abstract

The atmosphere is an important pathway for the transport of particulate matter from the continents to the oceans. Although the magnitude of these wind-borne fluxes is not accurately known, there is evidence that some could be large enough to have a significant impact on chemical and biological processes in the oceans. In addition, windborne particles (i.e. aerosols) play an important role in climate-related processes which in turn can have a great impact on physical, chemical, and biological processes taking place in the oceans. Aerosols can affect climate directly by scattering and absorbing both solar radiation and that which is re-emitted from the surface of the Earth to the atmosphere. Aerosols play a critical role in water vapour nucleation processes. In this way, they can affect the concentration and size distribution of cloud droplets, which in turn can alter the radiate properties of clouds. The role of aerosols in cloud processes also affects the nature and distribution of rainfall and the subsequent distribution of clouds.