NASA has turned a satellite built for ocean research into a leaf-peeping tool, publishing global maps of how red the world's vegetation looks from space. If you plan autumn trips around the colors, this is a new way to see where the show is happening.
The instrument is the Ocean Color Instrument (OCI) on NASA's PACE satellite, which looks at oceans and vegetation every day across 286 spectral bands. Some of those bands pick out the pigments behind fall color: anthocyanins for reds, carotenoids for yellows and oranges, and chlorophylls for greens.
How the redness maps work
Scientists compare how much red, orange and yellow a forest shows against how much green. Tracking that ratio over time shows where leaves are changing and when color peaks. A value near 1 means the satellite sees about as much red as green, so most leaves haven't turned yet. Higher values mean more red pigment.
The two maps cover September 29 to October 4 and October 5 to 11, 2026. In the first, the strongest red shows up across New England, northern Canada and northern Russia, with big patches in Alaska and Mongolia too. A week later the reddest areas had shifted toward the equator, into the Mid-Atlantic, the U.S. Southeast, southern Russia, China and Mongolia. NASA also notes that momijigari, Japan's "red leaf hunting," goes back more than a thousand years.
What the page doesn't say about crops
Our brief pointed to satellites spotting crop disease and plant stress before farmers do. The NASA page doesn't make that case. It covers foliage color only, and it gives no yield, farm cost or disease-detection findings. Reading leaf pigments from orbit is easy to imagine on a farm, but that's our inference, not something NASA claims here.
How current the maps are
The maps are a snapshot of two weeks, and the latest one ends October 11, more than two weeks before this story ran on October 26, so they won't show today's colors. NASA doesn't say here how closely they match what you'd see on the ground, and we couldn't confirm that with a PACE scientist.
Watch for NASA to publish later weeks as the color moves south. NASA doesn't say on its page when the next maps will appear, so if you're planning a weekend trip, check its page for the latest data before you go. Would you plan a weekend trip around a satellite map?
Sources
- 1.Hunting Red Leaves with Satellites - NASA Science · NASA Science
Reported by the WattsUpNext desk from the sources linked below. Spot an error? Tell us at corrections@wattsupnext.com.
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