Source Themes

Application of copper(II)-based chemicals induces CH3Br and CH3Cl emissions from soil and seawater

The widespread application of copper(II) pesticides in agriculture and the discharge of anthropogenic copper(II) to the oceans may account for part of the missing sources of CH3Br and CH3Cl.

Chloroform (CHCl3) emissions from coastal Antarctic tundra

In this study, the first in situ static-chamber measurements were conducted at coastal Antarctica tundra for CHCl3 fluxes, which showed that CHCl3 was naturally emitted from the Antarctic tundra at 35 ± 27 nmol m−2 d−1, comparable to other reported important natural sources.

The Saga of the Snow Lab’s Data

Robert Rhew is the faculty director of the Central Sierra field stations (which includes the Snow Lab, as well as the Sagehen Creek Field Station)

Global methyl halide emissions from rapeseed (*Brassica napus*) using life cycle measurements

This study quantifies methyl halide emissions from cultivated rapeseed (Brassica napus, cultivar: Empire), based on life cycle measurements and normalized to seed production.

Methyl Chloride and Methyl Bromide Production and Consumption in Coastal Antarctic Tundra Soils Subject to Sea Animal Activities

Antarctic tundra soil acted as a net sink for CH3Cl and CH3Br

Emission of volatile halogenated organic compounds over various Dead Sea landscapes

our findings point to the strong emission potential of a suite of VHOCs from saline soils and salt lakes and call for additional studies of emission rates and mechanisms of VHOCs from saline soils and salt lakes.

Halocarbon emissions from a degraded forested wetland in coastal South Carolina impacted by sea level rise

Sea level rise and more frequent storm surges derived from global climate change, in the long term, may increase emissions of chloroform from coastal degraded forested wetlands and of methyl halides if salt marshes expand, with potential impacts for stratospheric ozone depletion.

Ecosystem-Scale Measurements of Methyl Halide Fluxes From a Brackish Tidal Marsh Invaded With Perennial Pepperweed (Lepidium latifolium)

Here we present net ecosystem flux measurements of methyl halides from a brackish tidal marsh on the west coast of the United States between April 2016 and June 2017 using the relaxed eddy accumulation method.

Ethene, propene, butene and isoprene emissions from a ponderosa pine forest measured by Relaxed Eddy Accumulation

Here we report net ecosystem fluxes of light alkenes and isoprene from a semiarid ponderosa pine forest in the Rocky Mountains of Colorado, USA using the relaxed eddy accumulation (REA) technique during the summer of 2014. The light alkenes contribute significantly to the overall biogenic source of reactive hydrocarbons.

Model sensitivity studies of the decrease in atmospheric carbon tetrachloride

With an assumed CCl4 emission rate of 39 Gg year−1, the best estimate of loss processes still underestimates the observed CCl4 (overestimates the decay) over the past 2 decades but to a smaller extent than previous studies. Changes to the rate of CCl4 loss processes, in line with known uncertainties, could bring the model into agreement with in situ surface and remote-sensing measurements, as could an increase in emissions to around 47 Gg year−1.