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Hagner, Charlotte

doi:10.1023/a:1014191519871

Cited by 18 publications

(1 citation statement)

References 11 publications

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“…We also added historical emissions of particle‐phase PbBrCl and gas‐phase CH 3 Br from leaded gasoline for PA. Brominated compounds were added to leaded gasoline as additives since 1923 to prevent lead deposition in engines (Thomas et al, 1997). Leaded gasoline phase‐out efforts, starting in the 1970s in North America and 1980s in Europe, effectively eliminated global Pb emissions from this source (Hagner, 2002; Huang et al., 1996; Nriagu, 1990). Annual global bromine usage in gasoline peaked in the early 1970s at 170 ± 20 Gg, decreasing to 100 ± 11 Gg in 1980 (Thomas et al, 1997).…”

Section: Methodsmentioning

confidence: 99%

Anthropogenic Influence on Tropospheric Reactive Bromine Since the Pre‐industrial: Implications for Arctic Ice‐Core Bromine Trends

Zhai,

McConnell,

Chellman

et al. 2024

Geophysical Research Letters

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Tropospheric reactive bromine (Bry) influences the oxidation capacity of the atmosphere by acting as a sink for ozone and nitrogen oxides. Aerosol acidity plays a crucial role in Bry abundances through acid‐catalyzed debromination from sea‐salt‐aerosol, the largest global source. Bromine concentrations in a Russian Arctic ice‐core, Akademii Nauk, show a 3.5‐fold increase from pre‐industrial (PI) to the 1970s (peak acidity, PA), and decreased by half to 1999 (present day, PD). Ice‐core acidity mirrors this trend, showing robust correlation with bromine, especially after 1940 (r = 0.9). Model simulations considering anthropogenic emission changes alone show that atmospheric acidity is the main driver of Bry changes, consistent with the observed relationship between acidity and bromine. The influence of atmospheric acidity on Bry should be considered in interpretation of ice‐core bromine trends.

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