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Evaluating tropical phytoplankton phenology metrics using contemporary tools
John A Gittings1, Dionysios E Raitsos2,3,4, Malika Kheireddine5
1Department of Earth Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
Scientific Reports
|January 26, 2019
Summary
Satellite remote sensing accurately estimates phytoplankton phenology in tropical oceans. This ecosystem indicator helps monitor food availability and assess marine ecosystem health, crucial for management strategies.
Area of Science:
- Marine Ecology
- Oceanography
- Remote Sensing
Background:
- Phytoplankton phenology is a key ecosystem indicator for tropical marine health.
- Ocean-colour remote sensing offers global estimates but lacks validation data.
- Autonomous platforms enable new validation opportunities for satellite data.
Purpose of the Study:
- To assess the capability of remote sensing for estimating phytoplankton phenology metrics.
- To validate satellite-derived phenology using Biogeochemical-Argo data in the Red Sea.
- To understand remote sensing's role in monitoring tropical marine food webs.
Main Methods:
- Utilized satellite-derived surface chlorophyll-a (Chl-a) observations.
- Integrated data from autonomous Biogeochemical-Argo floats.
- Compared phenology metrics from satellite and in situ data in the northern Red Sea.
Main Results:
- Phenology metrics from satellite and contemporary platforms showed high precision (within 5 days).
- Remotely sensed surface signatures accurately reflected water column dynamics.
- Satellite data successfully captured Chl-a variability linked to convective mixing.
Conclusions:
- Remote sensing is capable of monitoring phytoplankton phenology in tropical marine ecosystems.
- Satellite-derived phenology serves as a valuable ecosystem indicator for management.
- Findings support using remote sensing in data-limited tropical regions.
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