Asymptotic light field in the presence of a bubble-layer
  We report that the submerged microbubbles are an efficient source of diffuse radiance and may contribute to a rapid transition to the diffuse asymptotic regime. In this asymptotic regime an average cosine is easily predictable and measurable. 
Piotr J. Flatau (Scripps Institution of Oceanography, University of   California, San Diego), Jacek Piskozub (Institute of O...