GMIS - VIIRS Monthly climatology sea surface diffuse attenuation coefficient at 490nm (4km) in m^-1

Water Transparency (Diffuse attenuation coefficient at 490nm, Kd490 in m^-1 at 4km resolution): The diffuse attenuation coefficient Kd490 measures the light penetration in the water column at the blue-green wavelengths (ca. 490 nm). It represents a good indicator of water transparency resulting from the combined action of absorption and backscattering by the water constituents, and the structure of the surrounding light field.水体透明度（490 nm处漫射衰减系数Kd490，单位m⁻¹，空间分辨率4 km）：490 nm处的漫射衰减系数Kd490（Diffuse attenuation coefficient at 490nm）用于表征蓝绿波段（约490 nm）下水体柱内的光穿透能力。该系数是水体各组分的吸收与后向散射作用，以及周边光场结构共同作用下产生的水体透明度的优良指示因子。