Dynamics of hollow glass microspheres on the surface of sea water and ice

Abstract:

Hollow glass microspheres (HGMs) are promising materials for arctic ice restoration. When spread in a thin layer on top of ice these materials can increase the albedo of arctic ice, potentially slowing the rate of ice melt and enhancing the formation of multiyear ice in the polar region.

The dynamics and physical characteristics of these materials on the surface of sea ice and water is important to understanding their lifecycle in a strategic application. Under controlled conditions in the Arctic performance characteristics such as reflectivity and uniformity of distribution as well as lifecycle dynamics were studied using cameras and net radiometers. Additionally, a model characterizing the movement of the HGMs over the surface of the ice and into the melt water was developed.

For use in Arctic conditions it is critical to have a basic understanding of material performance and knowledge of the potential tradeoffs that may be necessary to achieve adequate safety and performance.