OPTICAL-PROPERTIES OF OCEAN WATERS IN THE VICINITY OF THE CHATHAM RISE, SOUTH-PACIFIC OCEAN

Apparent optical properties of the water at 21 ocean stations in the S outh Pacific, east of New Zealand in the vicinity of the Chatham Rise, have been studied. Spectral irradiance attenuation and reflectance, a nd PAR irradiance attenuation, were measured in Sub-tropical and Sub-a ntarctic water masses, in the Sub-tropical Convergence zone between th em, and in coastal waters. The waters studied are considered to be pre dominantly Jerlov optical types II and III. Anomalous features at wave lengths above 590 nm in the spectra of reflectance and of the vertical attenuation coefficient for upward irradiance were attributed predomi nantly to Raman emission with a contribution from chlorophyll fluoresc ence at longer wavelengths.