Articles | Volume 20, issue 12
Atmos. Chem. Phys., 20, 7243–7258, 2020
https://doi.org/10.5194/acp-20-7243-2020
Atmos. Chem. Phys., 20, 7243–7258, 2020
https://doi.org/10.5194/acp-20-7243-2020

Research article 23 Jun 2020

Research article | 23 Jun 2020

Consumption of CH3Cl, CH3Br, and CH3I and emission of CHCl3, CHBr3, and CH2Br2 from the forefield of a retreating Arctic glacier

Moya L. Macdonald et al.

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Cited articles

ACIA: Arctic climate impacts assessment, Cambridge University Press, Cambridge, UK, 2005. 
Albers, C. N., Jacobsen, O. S., Flores, E. M. M., and Johnsen, A. R.: Arctic and subarctic natural soils emit chloroform and brominated analogues by alkaline hydrolysis of trihaloacetyl compounds, Environ. Sci. Technol., 51, 6131–6138, https://doi.org/10.1021/acs.est.7b00144, 2017. 
Amachi, S., Kamagata, Y., Kanagawa, T., and Muramatsu, Y.: Bacteria mediate methylation of iodine in marine and terrestrial environments, Appl. Environ. Microbiol., 67, 2718–2722, https://doi.org/10.1128/AEM.67.6.2718, 2001. 
Bekku, Y. S., Nakatsubo, T., Kume, A., Adachi, M., and Koizumi, H.: Effect of warming on the temperature dependence of soil respiration rate in arctic, temperate and tropical soils, Appl. Soil Ecol., 22, 205–210, https://doi.org/10.1016/S0929-1393(02)00158-0, 2003. 
Bradley, J. A., Singarayer, J. S., and Anesio, A. M.: Microbial community dynamics in the forefield of glaciers, Proc. R. Soc. B, 281, 1–9, https://doi.org/10.1098/rspb.2014.0882, 2014. 
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Climate change has caused glaciers in the Arctic to shrink, uncovering new soils. We used field measurements to study the exchange of a group of gases involved in ozone destruction, called halocarbons, between these new soils and the atmosphere. We found that mats of cyanobacteria, early colonisers of soils, are linked to a larger-than-expected exchange of halocarbons with the atmosphere. We also found that gases which are commonly thought to be marine in origin were released from these soils.
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