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.
ozone
Posted inEditors' Highlights
The Long Reach of El Niño’s Broom
Both the El Niño Southern Oscillation and natural variations in tropical Pacific weather conditions impact surface air quality in the Eastern United States.
Posted inResearch Spotlights
The Upside to a “Bad” Ozone Precursor
In Sweden’s wet heathland, scientists see how a sensitive ecosystem adapts to rising global temperatures.
Posted inNews
Ozone Pollution Maps Show Spikes Amid Broad Declines
Exceptionally comprehensive new maps detail current global concentrations and 15-year trends.
Posted inEditors' Highlights
New Estimates of Ozone Transport in Extratropical Cyclones
Cross-tropopause ozone transport in midlatitude cyclones, coincident with dry air intrusions, is derived from satellite and reanalysis data organized in cyclone-centric coordinates.
Posted inNews
Pollution over Southeast Asia May Threaten Ozone Health
Emissions of short-lived chlorine-based chemicals that deplete ozone are increasing worldwide. But over some regions of Asia, these chemicals may be on a fast track to the ozone layer.
Posted inResearch Spotlights
Could Stratospheric Ozone Depletion Make Hadley Cells Expand?
Convection-driven Hadley cells are expanding poleward. Scientists now may have uncovered part of the reason why.
Posted inResearch Spotlights
Including Ozone Complexities in Climate Change Projections
A simplified view of ozone chemistry can cause climate models to overestimate the response of jet streams to increasing greenhouse gases.
Posted inNews
New Way to Gauge Lightning's Role in Ozone Formation
Comparing satellite data on a key airborne ozone precursor to readings from a lightning sensor network reveals how much different types of lightning strokes affect atmospheric ozone chemistry.
Posted inResearch Spotlights
No Evidence for Unknown Source of Ozone Precursor
A study suggests that known combustion and photochemical sources of nitrous acid, a precursor to ground-level ozone, are enough to explain levels seen in the atmosphere.