Next Generation of Advanced Laser Fluorescence Technology for Characterization of Natural Aquatic Environments
Abstract
The project research addresses our long-term goal to develop an analytical suite of the Advanced Laser Fluorescence (ALF) methods and instruments to improve our capacity for characterization of aquatic environments. The ALF technique uniquely combines spectrally and temporally resolved measurements of the laser-stimulated emission (LSE) to provide assessments of key variables, including chlorophyll a (Chl a), chromophoric dissolved organic matter (CDOM), and phycobiliprotein-containing phytoplankton and cyanobacteria. The pump-during-probe measurements of variable fluorescence, Fv/Fm, yield assessments of phytoplankton photophysiological status. An extensive series of ALF measurements in diverse water types has demonstrated ALF utility as an integrated tool for aquatic research and observations. The specific goal of the project is to develop the next generation, commercial ALF sensors for oceanographic research, validation of satellite ocean color data, and environmental monitoring. The objectives are: 1. To develop the Aquatic Laser Fluorescence Analyzer (ALFA) for laboratory and field applications, including discrete sample analysis and underway shipboard measurements. 2. To develop the ALF In Situ (ALFIS) fiber-probe sensor. 3. To integrate, test and deploy the ALFA and ALFIS sensors on the solar-powered AUVs and research cruises. 4. To initiate operational use of the new ALF instruments for ecological and biogeochemical measurements, and validation of ocean color remote sensing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2011
- Accession Number
- ADA557193
Entities
People
- Alexander Chekalyuk
- Andrew Barnard
- Mati Kahru
Organizations
- Lamont–Doherty Earth Observatory