Abstract
A standardized bench-scale and meso-scale flume testing weathering study has been conducted on Calypso crude oil. The dispersibility testing was included to estimate the viscosity limits and the time window for dispersant use. The laboratory data were used as input to the SINTEF Oil Weathering Model (OWM) for weathering predictions from a surface release of Calypso at sea at 5 and 15 °C, reflecting winter and summer conditions. The weathering properties of Calypso are also discussed in relation to oil spill response.