Journal article
Environmental drivers of tropospheric bromine and mercury variability in coastal East Antarctica
NC Page, JA Fisher, SR Wilson, R Schofield, RG Ryan, S Gribben, AR Klekociuk, GC Edwards, A Morrison
Atmospheric Environment | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2025
Abstract
Bromine radicals released from sea ice, snow, and marine sources play a critical role in the atmospheric chemistry of polar regions. The Chemical and Mesoscale Mechanisms of Polar Cell Aerosol Nucleation (CAMMPCAN) ship campaign conducted in coastal East Antarctica over two 6-month periods in 2017–18 and 2018–19 provides a unique dataset to identify the environmental drivers of bromine variability in Antarctic spring and summer. In this study, we used CAMMPCAN chemical and meteorological observations combined with reanalysis data from the Modern Era Retrospective Analysis for Research and Applications version 2 (MERRA-2) and satellite-based sea ice data from the National Snow and Ice Data Ce..
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Grants
Awarded by Biological and Environmental Research
Funding Acknowledgements
This work was supported by the Australian Antarctic Division (grant 4431) , which funded the CAMMPCAN MAX-DOAS, Hg<SUP>0</SUP> , and O<SUB>3</SUB> measurements. O<SUB>3</SUB> measurements during the 2017-18 voyages were supported by the Measurements of Aerosols, Radiation, and Clouds over the Southern Ocean (MARCUS) project. O<SUB>3</SUB> measurements during the 2018-19 voyages were obtained by a ThermoFisher O<SUB>3</SUB> monitor provided the University of Wollongong. We thank Clare Paton-Walsh for performing the quality assurance and quality control of the O<SUB>3</SUB> instrument data. MARCUS data were obtained from the Atmospheric Radiation Measurement (ARM) Program sponsored by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research, and Climate and Environmental Sciences Division. We gratefully acknowledge all the CAMMPCAN scientists, ARM technicians and volunteers who were involved with data collection.