Transmission spectroscopy examinations of natural waters

摘要: Abstract The author defines a spectral slope value for ultraviolet absorption spectra of natural waters, use in major study characteristics Baltic waters. results show steepening the as total decreases going from slightly saline waters northern Bothnian Bay to North Sea entering Kattegat. This qualitative change is related selective loss high molecular weight humic components yellow substance. literature relating differences fractions humus reviewed. When data are combined with salinity values, categorization water types possible, giving surface, deep, and types. various processes contributing this differentiation discussed, an associated experiment examines effects bacterial activity on marine humus.