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Chlorophyll natural fluorescence response to upwelling events in the Southern Ocean Public Deposited

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  • 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.
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  • Letelier, Ricardo M., Mark R. Abbott, and D.M. Karl, 1997, Chlorophyll natural fluorescence response to upwelling events in the Southern Ocean, Geophys. Res. Letters, 24, 409–412.
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  • 24
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  • 4
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  • The present research was funded by NASA Grant NAGW-4596 and contract NAS 5-31360 (to M.R. Abbott) and NSF grant DPP-9118438 (to D.M. Karl).
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  • description.provenance : Made available in DSpace on 2010-04-14T00:13:04Z (GMT). No. of bitstreams: 1 Letelier Abbott Karl 1997 GRL.pdf: 1358952 bytes, checksum: f3a54ce904f3e4f81d84efa89a58b73f (MD5) Previous issue date: 1997
  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2010-04-14T00:12:24Z No. of bitstreams: 1 Letelier Abbott Karl 1997 GRL.pdf: 1358952 bytes, checksum: f3a54ce904f3e4f81d84efa89a58b73f (MD5)
  • description.provenance : Approved for entry into archive by Mark Abbott(mark@coas.oregonstate.edu) on 2010-04-14T00:13:04Z (GMT) No. of bitstreams: 1 Letelier Abbott Karl 1997 GRL.pdf: 1358952 bytes, checksum: f3a54ce904f3e4f81d84efa89a58b73f (MD5)
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  • 0094-8276

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