Research Highlights

Global and regional emissions estimates of HFC-152a (CH₃CHF₂) from observations (2016)

The concentration of HFC-152a has grown substantially since the first direct measurements in 1994; however, since 2007, the annual rate of growth has slowed. Analysis suggests substantial emissions from North America, Asia, and Europe.

Abrupt Recent Reversals in Emissions and Atmospheric Abundances of the two Montreal Protocol Compounds HCFC-31 and HCFC-133a (2015)

In two recent studies, lead by Empa, unexpected atmospheric trend reversals were found for the hydrochlorofluorocarbons (HCFCs) HCFC-31 (CH2ClF) and HCFC-133a (CF3CH2Cl).

First Observations of the Fourth Generation Synthetic Halocarbons HFC-1234yf, HFC-1234ze(E), and HCFC-1233zd(E) in the Atmosphere (2015)

We report multiyear atmospheric measurements of halocarbons from the high altitude observatory at Jungfraujoch and from urban Dubendorf (Switzerland). Analysis indicates significant emissions from source locations outside the footprints of the two stations.

Modern inhalation anesthetics: Potent greenhouse gases in the global atmosphere (2015)

Modern inhalation anesthetics undergo little metabolization during clinical application. From urban areas to the pristine Antarctic environment, we detect a rapid accumulation and ubiquitous presence of several anesthetics in the global atmosphere.

Trifluoromethane (HFC-23) Emissions in East Asia (2015)

Trifluoromethane (CHF3, HFC-23), with a 100-year global warming potential (GWP) of 12400, is regulated under the Kyoto Protocol.

HFC-43-10mee atmospheric abundances and global emission estimates (2014)

This electronics industry celaning solvent is considered only a minor contributor to global radiative forcing; however, our calculated emissions differ significantly from the available reported figures and projected estimates.

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