Satellite-photographed whitecap coverage and modelled whitecap coverage. Mean whitecap coverage W for March 1998 (average of 31 daily maps of W. (a) Coverage computed with wind speed formula (Equation 7) using daily fields of wind speed; (b) Coverage based on satellite measured observations. Redrawn from Anguelova and Webster (2006) with permission from John Wiley and Sons. DOI: https://doi.org/10.1525/elementa.283.f10