ERBE See Earth Radiation Budget Experiment. ESA European Space Agency. The process whereby a body of water becomes rich in dissolved nutrients through natural or man-made processes. This often results in a deficiency of dissolved oxygen, producing an environment that favors plant over animal life. When water is heated it becomes a vapor that increases humidity .
Evaporation is the opposite of condensation .
The uppermost layer of the atmosphere, its lower boundary is estimated at 500 km to 1000 km above the Earth's surface. It is only from the exosphere that atmospheric gases can, to any appreciable extent, escape into outer space. Click here to return to Introduction page.