Annual growth rings in trees tell us more than climate history; they can also document the rise and fall of human industrial activities.
Trace gases
Posted inResearch Spotlights
Budgeting Ozone-Depleting Emissions from Coastal Tidal Marshes
Brackish wetlands and their salt-tolerant vegetation are significant methyl halide emitters. The natural emissions add chlorine and bromine to the stratosphere, which break down ozone.
Posted inResearch Spotlights
Satellites Reveal a Temporary Carbon Sink over Australia
Satellite measurements of atmospheric carbon dioxide provide insights into how droughts and floods influence the carbon cycle on the semiarid continent of Australia.
Posted inResearch Spotlights
Details of Gas Flow in Wetland Plant Roots Unearthed
Scientists track the flow of trace gases through wetland root systems to understand the role of plants in biogenic gas fluxes.
Posted inResearch Spotlights
Methyl Chloride Can Track Tropical Air in the Lower Stratosphere
A new study shows that trace gas samples collected aboard commercial airliners can be used to determine the origin and dynamics of atmospheric air masses.
Posted inResearch Spotlights
Reservoirs Act as a Source for Greenhouse Gases
Scientists examine nitrous oxide production in aquatic environments and the conditions that drive it.
Posted inResearch Spotlights
Atmospheric Carbonyl Sulfide Hit a Minimum 5,000 Years Ago
A new ice core measurements-based record of a climate-active gas shows variability on millennial timescales.