The European Space Agency has launched the Biomass satellite to study the world's forests using the first space-based P-band synthetic aperture radar, aiming to accurately measure carbon storage and improve understanding of the global carbon cycle. CBS News reports: Forests on Earth collectively absorb and store about 8 billion tons of carbon dioxide annually, the ESA said. That regulates the planet's temperature. Deforestation and degradation, especially in tropical regions, means that stored carbon is being released back into the atmosphere, the ESA said, which can contribute to climate change. There's a lack of accurate data on how much carbon the planet's estimated 1.5 trillion trees store and how much human activity can impact that storage, the ESA said. To "weigh" the planet's trees and determine their carbon dioxide capacity, Biomass will use a P-band synthetic aperture radar. It's the first such piece of technology in space. The radar can penetrate forest canopies and measure woody biomass, including trunks, branches and stems, the ESA said. Most forest carbon is stored in these parts of the trees. Those measurements will act as a proxy for carbon storage, the ESA said. [...] Once the radar takes the measurements, the data will be received by the large mesh reflector. It will then be sent to the ESA's mission control center. Read more of this story at Slashdot.