Biogeochemical cycles, processes, and modeling – Page 4

Researchers assess how the behavior of groundwater influences nitrogen cycling in streams.

Changes in Groundwater Flow Affect Nitrogen Cycling in Streams

by Sarah Stanley 30 June 2017

Overpumping and other activities that affect groundwater levels could combine with increased nitrogen runoff to amplify threats to human and environmental health.

Researchers try to better model the role of Arctic plants on nitrogen uptake.

Research Spotlights

Tracking Nitrogen in Arctic Plants

by Elizabeth Thompson 20 June 2017

Prevailing nutrient uptake models do not fit Arctic plants. Scientists test a new option that overcomes older models’ shortcomings.

Streams and rivers play an important role in the exchange of carbon dioxide between terrestrial ecosystems, atmosphere, and ocean.

Research Spotlights

Why Is There So Much Carbon Dioxide in Rivers?

by S. Witman 19 May 2017

Observations of carbon dioxide oversaturation in the freshwater of the world led scientists to study its underlying causes at more than 100 field locations across the nation.

New research unravels how humans can address cognitive biases.

Research Spotlights

A Framework for Decisions on Science and Policy

by B. Bane 28 April 2017

Human reasoning has helped us become one of the most successful species to populate the planet, but we still struggle with cognitive biases.

Researchers examine the exchange of carbon dioxide between the air and water in an Arctic region where thick ice has prevented ship passage.

Research Spotlights

How Arctic Ice Affects Gas Exchange Between Air and Sea

by Sarah Stanley 14 April 2017

Scientists begin to fill a major data gap by investigating carbon dioxide dynamics in a remote region of the Arctic Ocean.

Sparse vegetation grows in special areas of the frosty soils in Komi Republic, in northwestern Russia.

Research Spotlights

High Arctic Emissions of a Strong Greenhouse Gas

by Sarah Stanley 6 April 2017

Isotope data bring scientists one step closer to revealing the microbial processes behind nitrous oxide emission in the tundra.

Researchers examine what amount of a river’s nutrient supply reaches the ocean.

Research Spotlights

What Proportion of River Nutrients Reaches the Open Sea?

by Terri Cook 22 February 2017

Results of the first geographically based estimates of river nutrient supply indicate that 75% of dissolved nitrogen and 80% of phosphorus reach the open ocean.