New method of sea-water natural admixture concentration determination by remote sensing without atmospheric correction

摘要

Abstract: A new characteristic of the sea surface radiance spectrum is suggested as a parameter for the optical remote sensing. It gives the possibility of efficient estimation of light absorbing and light scattering admixture concentrations in sea-water being practically invariant to the affection of the atmosphere. This parameter is the gradient of the sea spectral radiance coefficient distribution within the band 490-510 nm. The investigation of this gradient dependence upon the type of sea water in the open ocean, as well as in the Mediterranean, Black and Baltic Seas was carried out. The results are given, showing the high informativity of the suggested parameter. It should be stressed that the atmospheric light scattering doesn't contribute much to this parameter by ocean remote sensing through the atmosphere. That's why the spectral gradient of sea- atmosphere radiance coefficient at about 500 nm can be used for sea monitoring practically without atmospheric correction.!7