Research Highlights

Unexpected nascent atmospheric emissions of three ozone-depleting hydrochlorofluorocarbons (2021)

In this study, the need to detect and track unexpected substances in the atmosphere is demonstrated. The study reports on three hydrochlorofluorocarbons (HCFCs), which have no known purposeful end-uses.

Abundances, Emissions, and Loss Processes of atmospheric c-C4F8O (2019)

A new compound was discovered in the atmosphere, octafluorooxolane (c-C4F8O). It was detected in ambient and archived air samples by analysis using AGAGE-type Medusa-GCMS measurements.

Eight decades of atmospheric abundances and emissions for three CFCs (2018)

The three minor chlorofluorocarbons CFC-13, CFC-114, and CFC-115 are not disappearing from the atmosphere as quickly as one would expect given their ban by the Montreal Protocol.

High frequency measurements show change in HCFCs and their HFC replacements (2017)

HFCs have been introduced to replace environmentally-damaging HCFCs which can both destroy the Earth’s protective ozone layer and are potent greenhouse gases.

Distinct patterns found in ambient mixing ratios of atmospheric compounds in China (2017)

High precision measurements of three CFCs, three HCFCs, six HFCs, three PFCs, and SF6 were made at five Chinese background stations from January 2011 to December 2012.

Reexamining assumptions about the role of atmospheric oxidation in recent methane growth (2017)

Since 2007, scientists have been searching to find the cause of a sudden and unexpected global rise in atmospheric methane, a potent greenhouse gas, following almost a decade in which concentrations had stayed relatively constant.