Chlorophyll natural fluorescence response to upwelling events in the Southern Ocean
Variability of solar-induced (natural) fluorescence and chlorophyll were measured on scales of hours to weeks in the upper layer of a cyclonic eddy located south of the Antarctic Polar Front using a free-floating drifter. The fluorescence signal was analyzed both in terms of chlorophyll concentratio...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Article in Journal/Newspaper |
| Language: | English unknown |
| Published: |
American Geophysical Union
|
| Subjects: | |
| Online Access: | https://ir.library.oregonstate.edu/concern/articles/sq87bv92n |
| Summary: | Variability of solar-induced (natural) fluorescence and chlorophyll were measured on scales of hours to weeks in the upper layer of a cyclonic eddy located south of the Antarctic Polar Front using a free-floating drifter. The fluorescence signal was analyzed both in terms of chlorophyll concentration and as an indicator of energy distribution in the photosynthetic apparatus. Long-term trends in fluorescence parallel changes in chlorophyll concentration. Considering a significant positive correlation between fluorescence and the relative depth of the eddy upper layer we hypothesize that the observed short-term variations in natural fluorescence are a physiological response of phytoplankton to changes in the supply of limiting nutrients. This interpretation is consistent with the Southern Ocean iron limitation hypothesis. |
|---|