Laser remote sensing of phytoplankton photosynthetic activity and chlorophyll by using a shipboard lidar system

A. M. Chekalyuk, M. Yu Gorbunov

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


The potential role of lidar technique in the system of biomonitoring of the Sea and difficulties of data interpretation are discussed in the paper. Recent development of lidar implementation of pimp-and-probe technique may be considered as a step for solution of some related problems. This novel lidar technique may be classified as 'super-active'. The basic idea is the use of special (puajp) laser pulse to cause for a short while the change in functional state of phytoplankton photosynthetic apparatus. Corresponding relative increase ΔΦ/Φ of chlorophyll-a (Chl-a) fluorescence, induced at this moment by probe laser pulse within the same water volume, is a quantitative measure for phytoplankton photosynthetic activity. The use of this technique also provides more accurate assessments of Chl-a. concentration. The pump-and-probe shipboard lidar system is described in the paper. The results of field tests and apllications (the North-Western Atlantic, 1990; the Mediterranean Sea, 1991) of the developed technique in biological oceanography are discussed. The horizonal distributions of phytoplankton photosynthetic activity and chlorophyll fluorescence in synoptic and meso-scales, as well as correlation with hydrological structures and diurnal variations of measured characteristics were studied. The problems of future development are discussed.

Original languageEnglish (US)
Pages (from-to)391-400
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jun 17 1993
Externally publishedYes
EventLaser Study of Macroscopic Biosystems 1992 - Jyvaskyla, Finland
Duration: Sep 7 1992Sep 11 1992

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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