Chlorophyll Front Intensity
ProWhere modelled chlorophyll changes fastest across the map — the colour breaks, not the values. Brighter is a sharper change within that day's picture, so use it to find the line, not to measure it.
Updates daily
More detail
What you see. A dark map with bright bands and threads. A bright band is a color break: the place where green water meets blue. The color runs on a 0-to-1 scale with no units, and the scale is rebuilt for every frame.
How to use it. Find the band, then switch to Chlorophyll Concentration to see the values on each side of it. A band that holds its place across several frames and days counts for more. In Layer Settings you can change the Colormap and the Opacity.
How it relates to the other front layers. Chlorophyll Front Edges comes from the same calculation and draws only thin lines. Use Chlorophyll Front Intensity to see how strong and how wide a change is, and Chlorophyll Front Edges to see only where the lines are. On a flat day this layer still paints something, while Chlorophyll Front Edges can come up empty. There is a pair like this for four things: SST Front Intensity and SST Front Edges for temperature, Salinity Front Intensity and Salinity Front Edges for salinity, Chlorophyll Front Intensity and Chlorophyll Front Edges for chlorophyll, and Phytoplankton Front Intensity and Phytoplankton Front Edges for plant plankton. All eight are worked out from a forecast or a model, so none of them has cloud gaps. The only front layers made from satellite pictures are SST (ACSPO) Fronts and SST (GOES-19) Fronts, and both are for temperature.
Who makes it. RipIQ makes this layer itself from the Copernicus Marine model's chlorophyll, the Chlorophyll Concentration layer. The layer covers the Gulf of America, the East Coast and Baja.
Its limits. It is blank within about 2.5 nautical miles of land. A hard edge you ran over may not show. There is one frame a day, about a day behind today's date. Values are revised for up to two weeks afterward.
The numbers
| How often it updates | Once a day |
| How fresh it usually is | About one day behind today's date, and revised for up to two weeks afterward |
| How detailed it is | About 15 nautical miles (the Copernicus Marine model's grid) |
| Where it covers | Gulf of America, East Coast and Baja, minus a band of about 2.5 nautical miles along every coast |
| How far back you can look | 8 days back |
| Goes blank under cloud? | Never |
| Observed or modeled | Calculated by RipIQ from a Copernicus model field |
| What you see on screen | A 0-to-1 scale with no units. It is a ranking within that one frame |
Source: computed by RipIQ from Chlorophyll Concentration (Copernicus model).