| Popis: |
Secchi disc readings and corresponding phytoplankton values obtained during the 1938–1939 season, in the surface waters of two areas of the southern ocean remote from land, are recorded. They show an inverse correlation strong enough to suggest that phytoplankton quantity is the main factor changing the penetration of light into those waters with change of season. It is concluded that in open sea areas where precision data on light penetration are not available, some knowledge of the seasonal cycle of the microplankton should give a good rough indication of the variations in transparency to be expected. |
