Whitecap coverage vs. 10-m windspeed and sea surface temperature. Photographic measurements of whitecap coverage W (%) at 853 data points from 28 locations. A)W vs. wind speed at 10-m elevation (U₁₀); B)W vs. sea surface temperature (T_s). Note the large spread in W, as well as the absence of a clear relationship between W and T_s. Redrawn from Anguelova and Webster (2006). DOI: https://doi.org/10.1525/elementa.283.f9