42.68.-w Atmospheric and ocean optics
- 42.68.Ay Propagation, transmission, attenuation, and radiative transfer (see also 92.60.Ta Electromagnetic wave propagation)
- 42.68.Bz Atmospheric turbulence effects (see also 92.60.hk Convection, turbulence, and diffusion in meteorology)
- 42.68.Ca Spectral absorption by atmospheric gases (see also 92.60.Vb Radiative processes, solar radiation in meteorology)
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42.68.Ge Effects of clouds and water; ice crystal phenomena (see also 92.60.Jq Water in the atmosphere; 92.60.Nv Cloud physics and chemistry in meteorology)
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- 42.68.Jg Effects of aerosols (see also 92.60.Mt Particles and aerosols in meteorology; 92.20.Bk Aerosols in chemical and biological oceanography; 91.40.Dr Atmospheric effects in volcanology)
- 42.68.Kh Effects of air pollution (see also 92.60.Sz Air quality and air pollution in meteorology; 92.10.Xc Ocean fog in oceanography)
- 42.68.Mj Scattering, polarization (see also 92.60.Ta Electromagnetic wave propagation and 92.60.Vb Radiative processes, solar radiation in meteorology)
- 42.68.Sq Image transmission and formation
- 42.68.Wt Remote sensing; LIDAR and adaptive systems
- 42.68.Xy Ocean optics (see also 92.05.Hj Physical and chemical properties of sea water in oceanography)