N: 90 S: -90 E: 180 W: -180
Description
The Fluorescence Line Height (FLH) data suite quantifies the red chlorophyll-a fluorescence (~678–683 nm) emitted by phytoplankton, computed as the height of the measured water-leaving radiance above a spectrally interpolated baseline. FLH is widely used for HAB detection and tracking, identifying productive waters, and assessing phytoplankton physiology; values tend to be elevated in active blooms and can be reduced in complex waters. As with all ocean-color products, uncertainties increase in optically complex coastal/inland waters, so users should refer to mission/algorithm notes for details.
Geophysical variables in this suite include:
• nflh — Normalized Fluorescence Line Height (W m⁻² µm⁻¹ sr⁻¹)
• ipar — Instantaneous Photosynthetically Available Radiation (mol photons m⁻² s⁻¹)
Product Summary
Citation
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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Documents
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor | Offset |
|---|---|---|---|---|---|---|---|
| ipar | Instantaneous Photosynthetically Available Radiation | micromol m^-2 s^-1 | int16 | -32767 | N/A | 0.10000000149012 | 0 |
| lat | Latitude | degrees_north | float32 | -999 | -90 to 90 | N/A | N/A |
| lon | Longitude | degrees_east | float32 | -999 | -180 to 180 | N/A | N/A |
| nflh | Normalized Fluorescence Line Height | W m^-2 um^-1 sr^-1 | int16 | -32767 | -26470 to 32352 | 8.4999999671709E-5 | 2.25 |
| palette | palette | N/A | uint8 | N/A | N/A | N/A | N/A |