Understanding and quantifying the global methane (CH 4) budget is important for assessing
realistic pathways to mitigate climate change. Atmospheric emissions and concentrations of …

Acidity, defined as pH, is a central component of aqueous chemistry. In the atmosphere, the
acidity of condensed phases (aerosol particles, cloud water, and fog droplets) governs the …

It is unequivocal that the increases in atmospheric carbon dioxide (CO2), methane (CH4)
and nitrous oxide (N2O) since the pre-industrial period are caused by human activities. The …

Active chlorine in the atmosphere is poorly constrained and so is its role in the oxidation of
the potent greenhouse gas methane, causing uncertainty in global methane budgets. We …

Nitrate comprises the largest fraction of fine particulate matter in China during severe haze.
Consequently, strict control of nitrogen oxides (NO x) emissions has been regarded as an …

Atmospheric methane is both a potent greenhouse gas and photochemically active, with
approximately equal anthropogenic and natural sources. The addition of chlorine to the …

The atmospheric methane trend is not fully understood. Here we investigate the role of the
main sink, the main natural source, and anthropogenic emissions on the methane growth …

Observational evidence shows the ubiquitous presence of ocean-emitted short-lived
halogens in the global atmosphere,–. Natural emissions of these chemical compounds have …

We present an updated mechanism for tropospheric halogen (Cl+ Br+ I) chemistry in the
GEOS-Chem global atmospheric chemical transport model and apply it to investigate …

The acidity of aqueous atmospheric solutions is a key parameter driving both the partitioning
of semi-volatile acidic and basic trace gases and their aqueous-phase chemistry. In addition …