New Jersey canyons SST: The 65 °F break moved 5 miles offshore

What the passes show

36 passes over the water, in order, clouds left as holes (MetOp-B AVHRR, MetOp-C AVHRR, NOAA-21 VIIRS, NOAA-20 VIIRS).

The 65 °F break: a 7.2 °F step across it, seen on 28 of 36 passes. It moved 5 miles offshore since Sunday.

No chlorophyll edge on this line (1.2× across). At 50 m: 68.4 °F under the warm side, 65.3 °F under the cool side; the break reaches 50 m (3.1 °F across). Sea surface flat across the line (0 cm), 0.1 kn geostrophic current on the line.

Where the water says to look: Hudson Canyon, the Texas Tower, the Dip.

Every number is from the satellite passes. Where the water says to look — not where the fish are.

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A pass, a break, a composite

A pass is one satellite crossing the water once: it sees what the cloud lets it see and leaves the rest as holes. A break is a line the temperature steps across, and it only counts when more than one pass saw it. The composite fills the holes from the other passes of the same 72 hours.

How to read an SST passWhy fish sit on a breakComposite or single pass

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Satellite SST: NOAA/STAR ACSPO L3U via NASA PO.DAAC (subskin temperature)

Chlorophyll: NASA OB.DAAC VIIRS

Subsurface: Copernicus Marine (model)

Sea height: Copernicus Marine DUACS altimetry

Coastline: Made with Natural Earth

Every data source and licence