Air pollution has been recognized as a threat to human health since the time of Hippocrates,
ca 400 BC. Successive written accounts of air pollution occur in different countries through …

From the earliest observations of ozone in the lower atmosphere in the 19th century, both
measurement methods and the portion of the globe observed have evolved and changed …

Short‑lived climate forcers (SLCFs) affect climate and are, in most cases, also air pollutants.
They include aerosols (sulphate, nitrate, ammonium, carbonaceous aerosols, mineral dust …

Introduction of high‐performing crop cultivars and crop/soil water management practices that
increase the stomatal uptake of carbon dioxide and photosynthesis will be instrumental in …

In support of the first Tropospheric Ozone Assessment Report (TOAR) a relational database
of global surface ozone observations has been developed and populated with hourly …

Atmospheric carbon monoxide (CO) concentrations have been decreasing since 2000, as
observed by both satellite-and ground-based instruments, but global bottom-up emission …

Rising emissions from wildfires over recent decades in the Pacific Northwest are known to
counteract the reductions in human-produced aerosol pollution over North America. Since …

Following past studies to quantify decadal trends in global carbon monoxide (CO) using
satellite observations, we update estimates and find a CO trend in column amounts of …

Extracting globally representative trend information from lower tropospheric ozone
observations is extremely difficult due to the highly variable distribution and interannual …

Pollutant dispersion processes over complex terrain are much more complicated than over
flat areas, as they are affected by atmospheric interactions with the orography at different …