First Light Demonstration of Red Solar Induced Fluorescence for Harmful Algal Bloom Monitoring
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1.
Jet Propulsion Lab
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2.
California Institute of Technology
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3.
European Organisation for the Exploitation of Meteorological Satellites
Abstract
The risks harmful algal blooms (HAB) pose to aquatic ecosystems, public health, and coastal economies necessitate supplementation of current observation strategies. Herein, we explore the use of red solar induced fluorescence (SIF) from the TROPOspheric Monitoring Instrument (TROPOMI), a remote sensing measurement retrievable in variable cloud conditions, for Karenia brevis detection. Along the West Florida Shelf from 2018 to 2020, we compare red SIF with normalized fluorescence line height (nFLH) from MODIS-Aqua, a standard remote sensing HAB indicator limited to clear sky days. A strong positive linear relationship is found between nFLH and red SIF during severe bloom conditions in 2018 (N = 33,376, r-value = 0.79, R2 = 0.63) permitting direct comparison. Red SIF provided nearly double the amount of spatiotemporal fluorescence information than nFLH. This work presents the first application of TROPOMI's red SIF for HAB monitoring and illuminates an approach for bolstering early warning systems for HABs beyond clear sky conditions.
Copyright and License
© 2023 Jet Propulsion Laboratory, California Institute of Technology and The Authors. Government sponsorship acknowledged.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Acknowledgement
This work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). Luis was supported by the NASA Postdoctoral Program. We are grateful for the partner agencies and volunteer network that provided Karenia brevis abundance data to the FWC-FWRI HAB Monitoring Database.
Data Availability
The nFLH and red SIF data can be downloaded from NASA OB.DAAC (https://doi.org/10.5067/AQUA/MODIS/L3M/FLH/2022) and from CaltechDATA (https://doi.org/10.22002/vn6v0-pfr77), respectively. The Karenia brevis data set can be retrieved from the FWC-FWRI HAB Monitoring Database (https://myfwc.com/research/redtide/monitoring/database/).
Supplemental Material
Supporting Information (DOCX)
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Additional details
- Jet Propulsion Laboratory
- National Aeronautics and Space Administration
- 80NM0018D0004
- National Aeronautics and Space Administration
- NASA Postdoctoral Program
- Accepted
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2023-05-18Accepted
- Available
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2023-07-10Version of Record online
- Caltech groups
- Division of Geological and Planetary Sciences
- Publication Status
- Published