Satellite mapping of enhanced BrO concentrations in the troposphere

Article Abstract:

The GOME instrument, aboard the European research satellite ERS-2, comprises four spectrometers measuring sunlight reflected from Earth and detecting different atmospheric trace gases. Slant column densities (SCD) of the absorbing trace gases have been calculated from the measured raw spectra of the GOME instrument. Reactive bromine species make a significant contribution to the destruction of ozone. Satellite observations have shown that tropospheric air masses enriched in BrO are always close to sea ice and BrO abundances stay enhanced for 1-3 days.

Stratosphere

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Evidence for bromine monoxide in the free troposphere during the Arctic polar sunrise

Article Abstract:

Dramatic ozone losses occur during the Arctic polar springtime, both in the stratosphere and in the troposphere. Tropospheric ozone loss events in the planetary boundary layer (PBL) have been associated with enhanced halogen species concentrations, involving bromine monoxide (BrO) and possibly chlorine monoxide (C1O). BrO observations have been obtained indicating the presence of significant amounts of BrO in the PBL and the troposphere, transported via convection over large Arctic ice leads.

Troposphere, Halogens, Halogen elements, Planetary boundary layer

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Bromine explosion

Article Abstract:

Hebestreit and colleagues have described the discovery of air laden with bromine monoxide (BrO) from salt pans close to the Dead Sea. McElroy and colleagues have also observed BrO from measurements in the Arctic, arguing that it must occur throughout the troposphere. The believe that bromine-laden air is ventilated through the boundary layer by convection from cracks in the ice pack.

Atmospheric chemistry

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