Methyl bromide under scrutiny

Article Abstract:

Methyl bromide (CH3Br) is the main source of bromine in the stratosphere and is almost 50% more efficient in converting ozone to oxygen as compared to chlorine. CH3Br is short lived and very reactive and so stopping its emission should reduced ozone depletion fast. However, a large amount of the CH3Br is emitted from natural sources such as the oceans and biomass burning while some is emitted by agricultural use, automobiles and fumigation. The oceans are both a source of emission and a sink which complicates the issue of natural emission. The main sinks are the ocean, reaction with OH and soil.

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Better budgets for methyl halides?

Article Abstract:

Methyl bromide and methyl chloride originate largely from natural sources. New research may help to provide a better understanding of the calculated budgets of methyl halides in the atmosphere. High emissions of methyl halides from terrestrial-coastal ecosystems have been identified, and there is also evidence an abiotic mechanism of organic halide production in organic-rich soils.

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Leaf sensor for CO2 in deep time

Article Abstract:

Research is presented describing the study of climatic changes and amounts of CO2 in the atmosphere using a new method which measure the level of CO2 in leave pores.

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