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ToolsMorin, S, Marion, GM, von Glasow, R, Voisin, D, Bouchez, J and Savarino, J (2008) Precipitation of salts in freezing seawater and ozone depletion events: A status report. pp. 9035-9060.
Full text not available from this repository.Abstract
In springtime, the polar marine boundary layer exhibits drastic ozone depletion events (ODEs), associated with elevated bromine oxide (BrO) mixing ratios. The current interpretation of this peculiar chemistry requires the existence of acid and bromide-enriched surfaces to heterogeneously promote and sustain ODEs. In a recent study, Sander et al. (2006) have proposed that calcium carbonate (CaCO3) precipitation in any seawater-derived medium could potentially decrease its alkalinity, making it easier for atmospheric acids such as HNO3 and H2SO4 to acidify it. We performed simulations using the state-of-the-art FREZCHEM model, capable of handling concentrated electrolyte solutions, to check the preliminary results of Sander et al. (2006). We show that the alkalinity of brine is indeed reduced to about half and a third of the initial alkalinity of seawater, at 263 K and 253 K, respectively. Such levels of alkalinity depletion have been shown to speed-up the onset of ODEs (Sander et al., 2006; Piot and von Glasow, 2008a), suggesting that carbonate precipitation could well be a key phenomenon linked with ODEs, in polar regions but also in other cold areas, such as altitude salt lakes. In addition, the evolution of the Cl/Br ratio in the brine during freezing was computed using FREZCHEM, taking into account Br substitutions in Cl–containing salts.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | sdg 12 - responsible consumption and production,sdg 14 - life below water ,/dk/atira/pure/sustainabledevelopmentgoals/responsible_consumption_and_production |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences |
| UEA Research Groups: | Faculty of Science > Research Groups > Volcanoes@UEA (former - to 2018) Faculty of Science > Research Groups > Marine and Atmospheric Sciences (former - to 2017) Faculty of Science > Research Groups > Meteorology, Oceanography and Climate Dynamics (former - to 2017) Faculty of Science > Research Groups > Atmospheric Chemistry (former - to 2018) Faculty of Science > Research Groups > Climate, Ocean and Atmospheric Sciences (former - to 2017) Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences |
| Related URLs: | |
| Depositing User: | Rosie Cullington |
| Date Deposited: | 25 Feb 2011 14:30 |
| Last Modified: | 13 Sep 2023 09:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/24806 |
| DOI: |
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