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Earth

Mud Matters

NASA has launched SMAP, a new satellite to study water, not in oceans or lakes but in the soil beneath our feet. This often overlooked repository of water can have big effects on weather, climate, drought and agriculture.

Carbon Cycle & Ecosystems

The Earth's ecosystems and biogeochemical cycles (such as carbon, nitrogen, and phosphorus) both drive and respond to environmental changes ranging from local to global scales. These current environmental changes appear to be unprecedented, in both timing and geographical extent. Major uncertainties in Earth science originate from the dynamics and interactions within and between ecosystems and their biogeochemical cycles across land, ocean, atmosphere, and human activities.

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