The European Space Agency (ESA) has launched a 315 million Euro ($465 Million) satellite that will monitor soil moisture, plant growth, and the salt content of sea water, all of which will be useful in tracking environmental changes as the planet warms.
The satellite, called SMOS — Soil Moisture and Ocean Salinity — has the capacity to measure the water content of soil across the planet every three days to a depth of seven feet, enabling it not only to gauge surface water sources but also to monitor photosynthesis and plant growth. The data also will be valuable to scientists interested in forecasting drought and flood risk.