The potential importance of frost flowers, recycling on snow, and open leads for Ozone Depletion Events
International audience We present model studies with the one-dimensional model MISTRA to investigate the potential role of frost flowers, recycling on snow, and open leads in the depletion of tropospheric ozone in the Arctic spring. In our model, we assumed frost flower aerosols to be the major sour...
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ftinsu:oai:HAL:hal-00302695v1 2023-11-12T04:14:05+01:00 The potential importance of frost flowers, recycling on snow, and open leads for Ozone Depletion Events Piot, M. von Glasow, R. Institute of Environmental Physics Bremen (IUP) University of Bremen 2007-04-02 https://hal.science/hal-00302695 https://hal.science/hal-00302695/document https://hal.science/hal-00302695/file/acpd-7-4521-2007.pdf en eng HAL CCSD European Geosciences Union hal-00302695 https://hal.science/hal-00302695 https://hal.science/hal-00302695/document https://hal.science/hal-00302695/file/acpd-7-4521-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00302695 Atmospheric Chemistry and Physics Discussions, 2007, 7 (2), pp.4521-4595 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2007 ftinsu 2023-10-25T16:26:31Z International audience We present model studies with the one-dimensional model MISTRA to investigate the potential role of frost flowers, recycling on snow, and open leads in the depletion of tropospheric ozone in the Arctic spring. In our model, we assumed frost flower aerosols to be the major source of bromine. We show that a major ozone depletion event can be satisfactorily reproduced only if the recycling on snow of deposited bromine into gas phase bromine is assumed. In the model, this cycling is more efficient than the bromine explosion process and maintains sufficiently high levels of bromine to deplete ozone down to few nmol mol ?1 within four days. We assessed the influence of different surface combinations (open lead/frost flowers) on the chemistry in the model. Results showed noticeable modifications affecting the composition of aerosols and the deposition velocities. A model run with a series of coupled frost flower fields and open leads, separated by large areas of snow, showed results comparable with field observations. In addition, we studied the effects of modified temperature of either the frost flower field or the ambient airmass. A warmer frost flower field increases the relative humidity and the aerosol deposition rate. The deposition/re-emission process gains in importance, inducing more reactive bromine in the gas phase, and a stronger ozone depletion. A decrease of 1 K in airmass temperature shows in our model that the aerosol uptake capacities of all gas phase species substantially increases, leading to enhanced uptake of acids from the gas phase. Consequently, the so-called bromine explosion accelerated and O 3 mixing ratios decreased. In our model representation, variations in wind speed affected the aerosol source function and influenced the amount of bromine in the atmosphere and thus the ozone depletion strength. Recent studies have suggested the important role of the precipitation of calcium carbonate (CaCO 3 ) out of the brine layer for the possible acidification of the liquid ... Article in Journal/Newspaper Arctic Institut national des sciences de l'Univers: HAL-INSU Arctic |
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Institut national des sciences de l'Univers: HAL-INSU |
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language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Piot, M. von Glasow, R. The potential importance of frost flowers, recycling on snow, and open leads for Ozone Depletion Events |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience We present model studies with the one-dimensional model MISTRA to investigate the potential role of frost flowers, recycling on snow, and open leads in the depletion of tropospheric ozone in the Arctic spring. In our model, we assumed frost flower aerosols to be the major source of bromine. We show that a major ozone depletion event can be satisfactorily reproduced only if the recycling on snow of deposited bromine into gas phase bromine is assumed. In the model, this cycling is more efficient than the bromine explosion process and maintains sufficiently high levels of bromine to deplete ozone down to few nmol mol ?1 within four days. We assessed the influence of different surface combinations (open lead/frost flowers) on the chemistry in the model. Results showed noticeable modifications affecting the composition of aerosols and the deposition velocities. A model run with a series of coupled frost flower fields and open leads, separated by large areas of snow, showed results comparable with field observations. In addition, we studied the effects of modified temperature of either the frost flower field or the ambient airmass. A warmer frost flower field increases the relative humidity and the aerosol deposition rate. The deposition/re-emission process gains in importance, inducing more reactive bromine in the gas phase, and a stronger ozone depletion. A decrease of 1 K in airmass temperature shows in our model that the aerosol uptake capacities of all gas phase species substantially increases, leading to enhanced uptake of acids from the gas phase. Consequently, the so-called bromine explosion accelerated and O 3 mixing ratios decreased. In our model representation, variations in wind speed affected the aerosol source function and influenced the amount of bromine in the atmosphere and thus the ozone depletion strength. Recent studies have suggested the important role of the precipitation of calcium carbonate (CaCO 3 ) out of the brine layer for the possible acidification of the liquid ... |
author2 |
Institute of Environmental Physics Bremen (IUP) University of Bremen |
format |
Article in Journal/Newspaper |
author |
Piot, M. von Glasow, R. |
author_facet |
Piot, M. von Glasow, R. |
author_sort |
Piot, M. |
title |
The potential importance of frost flowers, recycling on snow, and open leads for Ozone Depletion Events |
title_short |
The potential importance of frost flowers, recycling on snow, and open leads for Ozone Depletion Events |
title_full |
The potential importance of frost flowers, recycling on snow, and open leads for Ozone Depletion Events |
title_fullStr |
The potential importance of frost flowers, recycling on snow, and open leads for Ozone Depletion Events |
title_full_unstemmed |
The potential importance of frost flowers, recycling on snow, and open leads for Ozone Depletion Events |
title_sort |
potential importance of frost flowers, recycling on snow, and open leads for ozone depletion events |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00302695 https://hal.science/hal-00302695/document https://hal.science/hal-00302695/file/acpd-7-4521-2007.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00302695 Atmospheric Chemistry and Physics Discussions, 2007, 7 (2), pp.4521-4595 |
op_relation |
hal-00302695 https://hal.science/hal-00302695 https://hal.science/hal-00302695/document https://hal.science/hal-00302695/file/acpd-7-4521-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782331797394161664 |