Nitrogen in Permafrost Soils May Exert Great Feedbacks on Climate Changes

Permafrost soil.

The researchers are taking high-resolution soil and gas samples down to the upper layers of the permafrost across multiple sites with differing landscape characteristics, from upland forests to lowland bogs. (Image: Hannes Grobe via Wikimedia Commons)

A New Source of Global Nitrogen Has Been Discovered

Weathering rocks.

Weathering rocks, like the limestone at Stone Forest National Park in China, hold significant levels of nitrogen. (Image: Eric Chan via Flickr)