Ria Formosa Single planar light sensor–2007/2008 mean Kd (m-1) Ram 0.25 0.79 0.59 0.57 0.53 - 0.90 0.59 1.10 - 0.66 0.90 0.69 Ponte 0.68 0.96 0.93 0.77 1.28 - 1.27 1.10 1.3 0.96 1.17 0.75 0.93     M A M J J A S O N D J F

Table 1: Mean values of the diffuse attenuation coefficient (m-1) measured at Ponte and Ramalhete (Ria Formosa) from March 2007 to February 2008 with the single planar light sensor.