PACE Land Vegetation Data: Siberia
A regional view over Siberia of three major classes of plant pigments observed by the PACE satellite: chlorophylls (shown in green), carotenoids (shown in blue), and anthocyanins (shown in red). White represents regions where all three indices have similar values. This visualization spans March 2024 to March 2025.
Launched in early 2024, NASA’s new Plankton Aerosol Cloud ocean Ecosystem (PACE) satellite provides the world’s first and only hyperspectral, global coverage of terrestrial ecosystems every 1-2 days. Hyperspectral satellite observations such as these can allow us to detect vegetation characteristics such as concentrations of leaf pigments which play important roles in plant photosynthesis and protection, advancing our ability to understand and measure regional forest and crop health and productivity from space.
Spanning PACE’s first 12 months of observations, shown here are monthly-averaged indices of three major classes of plant pigments: chlorophylls, carotenoids, and anthocyanins. Chlorophyll is the green pigment in leaves, the only pigment that previous satellite missions were specifically designed to detect. Carotenoids and anthocyanins are yellow and red pigments also found in leaves. Chlorophyll controls potential photosynthesis, while carotenoids and anthocyanins can aid photosynthesis and help to provide protection to plants when under stress.
The magenta color above indicates anthocyanin, green indicates chlorophyll, and cyan is for carotenoids. The color represents the relative amounts of each of these pigments. The brightness of the color represents the amount of leaves, with brighter colors meaning more leaves. For example, the bright green of the tropical forests shows they have lots of leaves with lots of chlorophyll in them.
The onset of spring in the northern hemisphere is evident as the pigment indices show the northwards march of spring leaf-out between the months of March and May. Black color over land shows no, or very low, leaf or pigment levels. Note how these zones of black in deciduous regions of the northern hemisphere decrease (plants transitioning to spring) and increase in the south (plants transitioning to winter) until September when the pattern begins to reverse with the beginnings of northern hemisphere fall and spring in the southern hemisphere. In contrast, regions where plants undergo less seasonal change show comparatively less difference in these indices over time.
