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Observations of bromine monoxide transport in the Arctic sustained on aerosol particles
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| Veröffentlicht in: | Atmospheric chemistry and physics / Discussions 17(2017), 12, Seite 7567-7579 |
|---|---|
| Personen und Körperschaften: | , , , , , , , |
| Titel: | Observations of bromine monoxide transport in the Arctic sustained on aerosol particles/ Peter K. Peterson, Denis Pöhler, Holger Sihler, Johannes Zielcke, Stephan General, Udo Frieß, Ulrich Platt, William R. Simpson, Son V. Nghiem, Paul B. Shepson, Brian H. Stirm, Suresh Dhaniyala, Thomas Wagner, Dana R. Caulton, Jose D. Fuentes, and Kerri A. Pratt |
| Format: | E-Book-Kapitel |
| Sprache: | Englisch |
| veröffentlicht: |
22 June 2017
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| Gesamtaufnahme: |
: Atmospheric chemistry and physics / Discussions, 17(2017), 12, Seite 7567-7579
, volume:17 |
| Quelle: | Verbunddaten SWB Lizenzfreie Online-Ressourcen |
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| 520 | |a The return of sunlight in the polar spring leads to the production of reactive halogen species from the surface snowpack, significantly altering the chemical composition of the Arctic near-surface atmosphere and the fate of long-range transported pollutants, including mercury. Recent work has shown the initial production of reactive bromine at the Arctic surface snowpack; however, we have limited knowledge of the vertical extent of this chemistry, as well as the lifetime and possible transport of reactive bromine aloft. Here, we present bromine monoxide (BrO) and aerosol particle measurements obtained during the March 2012 BRomine Ozone Mercury EXperiment (BROMEX) near Utqiaġvik (Barrow), AK. The airborne differential optical absorption spectroscopy (DOAS) measurements provided an unprecedented level of spatial resolution, over 2 orders of magnitude greater than satellite observations and with vertical resolution unable to be achieved by satellite methods, for BrO in the Arctic. This novel method provided quantitative identification of a BrO plume, between 500m and 1km aloft, moving at the speed of the air mass. Concurrent aerosol particle measurements suggest that this lofted reactive bromine plume was transported and maintained at elevated levels through heterogeneous reactions on colocated supermicron aerosol particles, independent of surface snowpack bromine chemistry. This chemical transport mechanism explains the large spatial extents often observed for reactive bromine chemistry, which impacts atmospheric composition and pollutant fate across the Arctic region, beyond areas of initial snowpack halogen production. The possibility of BrO enhancements disconnected from the surface potentially contributes to sustaining BrO in the free troposphere and must also be considered in the interpretation of satellite BrO column observations, particularly in the context of the rapidly changing Arctic sea ice and snowpack. | ||
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| author | Peterson, Peter K., Pöhler, Denis, Sihler, Holger, Zielcke, Johannes, General, Stephan, Frieß, Udo, Platt, Ulrich, Wagner, Thomas |
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| contents | The return of sunlight in the polar spring leads to the production of reactive halogen species from the surface snowpack, significantly altering the chemical composition of the Arctic near-surface atmosphere and the fate of long-range transported pollutants, including mercury. Recent work has shown the initial production of reactive bromine at the Arctic surface snowpack; however, we have limited knowledge of the vertical extent of this chemistry, as well as the lifetime and possible transport of reactive bromine aloft. Here, we present bromine monoxide (BrO) and aerosol particle measurements obtained during the March 2012 BRomine Ozone Mercury EXperiment (BROMEX) near Utqiaġvik (Barrow), AK. The airborne differential optical absorption spectroscopy (DOAS) measurements provided an unprecedented level of spatial resolution, over 2 orders of magnitude greater than satellite observations and with vertical resolution unable to be achieved by satellite methods, for BrO in the Arctic. This novel method provided quantitative identification of a BrO plume, between 500m and 1km aloft, moving at the speed of the air mass. Concurrent aerosol particle measurements suggest that this lofted reactive bromine plume was transported and maintained at elevated levels through heterogeneous reactions on colocated supermicron aerosol particles, independent of surface snowpack bromine chemistry. This chemical transport mechanism explains the large spatial extents often observed for reactive bromine chemistry, which impacts atmospheric composition and pollutant fate across the Arctic region, beyond areas of initial snowpack halogen production. The possibility of BrO enhancements disconnected from the surface potentially contributes to sustaining BrO in the free troposphere and must also be considered in the interpretation of satellite BrO column observations, particularly in the context of the rapidly changing Arctic sea ice and snowpack. |
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| spelling | Peterson, Peter K. 19XX- VerfasserIn (DE-588)1136735933 (DE-627)893515914 (DE-576)473673770 aut, Observations of bromine monoxide transport in the Arctic sustained on aerosol particles Peter K. Peterson, Denis Pöhler, Holger Sihler, Johannes Zielcke, Stephan General, Udo Frieß, Ulrich Platt, William R. Simpson, Son V. Nghiem, Paul B. Shepson, Brian H. Stirm, Suresh Dhaniyala, Thomas Wagner, Dana R. Caulton, Jose D. Fuentes, and Kerri A. Pratt, 22 June 2017, 13, Text txt rdacontent, Computermedien c rdamedia, Online-Ressource cr rdacarrier, Gesehen am 13.07.2017, The return of sunlight in the polar spring leads to the production of reactive halogen species from the surface snowpack, significantly altering the chemical composition of the Arctic near-surface atmosphere and the fate of long-range transported pollutants, including mercury. Recent work has shown the initial production of reactive bromine at the Arctic surface snowpack; however, we have limited knowledge of the vertical extent of this chemistry, as well as the lifetime and possible transport of reactive bromine aloft. Here, we present bromine monoxide (BrO) and aerosol particle measurements obtained during the March 2012 BRomine Ozone Mercury EXperiment (BROMEX) near Utqiaġvik (Barrow), AK. The airborne differential optical absorption spectroscopy (DOAS) measurements provided an unprecedented level of spatial resolution, over 2 orders of magnitude greater than satellite observations and with vertical resolution unable to be achieved by satellite methods, for BrO in the Arctic. This novel method provided quantitative identification of a BrO plume, between 500m and 1km aloft, moving at the speed of the air mass. Concurrent aerosol particle measurements suggest that this lofted reactive bromine plume was transported and maintained at elevated levels through heterogeneous reactions on colocated supermicron aerosol particles, independent of surface snowpack bromine chemistry. This chemical transport mechanism explains the large spatial extents often observed for reactive bromine chemistry, which impacts atmospheric composition and pollutant fate across the Arctic region, beyond areas of initial snowpack halogen production. The possibility of BrO enhancements disconnected from the surface potentially contributes to sustaining BrO in the free troposphere and must also be considered in the interpretation of satellite BrO column observations, particularly in the context of the rapidly changing Arctic sea ice and snowpack., Pöhler, Denis VerfasserIn (DE-588)142061174 (DE-627)633519308 (DE-576)326993282 aut, Sihler, Holger VerfasserIn (DE-588)1025643429 (DE-627)724443924 (DE-576)370576322 aut, Zielcke, Johannes VerfasserIn (DE-588)141930462 (DE-627)704097966 (DE-576)325411344 aut, General, Stephan VerfasserIn (DE-588)103393061X (DE-627)743686918 (DE-576)381614247 aut, Frieß, Udo VerfasserIn (DE-588)106331822X (DE-627)810984709 (DE-576)177386088 aut, Platt, Ulrich 1949- VerfasserIn (DE-588)13766740X (DE-627)594831385 (DE-576)304832634 aut, Wagner, Thomas 1966- VerfasserIn (DE-588)1025076591 (DE-627)721004938 (DE-576)369910109 aut, Enthalten in Atmospheric chemistry and physics / Discussions Katlenburg-Lindau : EGU, 2001 17(2017), 12, Seite 7567-7579 Online-Ressource (DE-627)341901156 (DE-600)2069857-4 (DE-576)267942443 1680-7375 nnns, volume:17 year:2017 number:12 pages:7567-7579 extent:13, http://dx.doi.org/10.5194/acp-17-7567-2017 Verlag Resolving-System kostenfrei Volltext, https://www.atmos-chem-phys.net/17/7567/2017/ Verlag kostenfrei Volltext, http://dx.doi.org/10.5194/acp-17-7567-2017 LFER, LFER 2017-08-09T00:00:00Z |
| spellingShingle | Peterson, Peter K., Pöhler, Denis, Sihler, Holger, Zielcke, Johannes, General, Stephan, Frieß, Udo, Platt, Ulrich, Wagner, Thomas, Observations of bromine monoxide transport in the Arctic sustained on aerosol particles, The return of sunlight in the polar spring leads to the production of reactive halogen species from the surface snowpack, significantly altering the chemical composition of the Arctic near-surface atmosphere and the fate of long-range transported pollutants, including mercury. Recent work has shown the initial production of reactive bromine at the Arctic surface snowpack; however, we have limited knowledge of the vertical extent of this chemistry, as well as the lifetime and possible transport of reactive bromine aloft. Here, we present bromine monoxide (BrO) and aerosol particle measurements obtained during the March 2012 BRomine Ozone Mercury EXperiment (BROMEX) near Utqiaġvik (Barrow), AK. The airborne differential optical absorption spectroscopy (DOAS) measurements provided an unprecedented level of spatial resolution, over 2 orders of magnitude greater than satellite observations and with vertical resolution unable to be achieved by satellite methods, for BrO in the Arctic. This novel method provided quantitative identification of a BrO plume, between 500m and 1km aloft, moving at the speed of the air mass. Concurrent aerosol particle measurements suggest that this lofted reactive bromine plume was transported and maintained at elevated levels through heterogeneous reactions on colocated supermicron aerosol particles, independent of surface snowpack bromine chemistry. This chemical transport mechanism explains the large spatial extents often observed for reactive bromine chemistry, which impacts atmospheric composition and pollutant fate across the Arctic region, beyond areas of initial snowpack halogen production. The possibility of BrO enhancements disconnected from the surface potentially contributes to sustaining BrO in the free troposphere and must also be considered in the interpretation of satellite BrO column observations, particularly in the context of the rapidly changing Arctic sea ice and snowpack. |
| swb_id_str | 490803148 |
| title | Observations of bromine monoxide transport in the Arctic sustained on aerosol particles |
| title_auth | Observations of bromine monoxide transport in the Arctic sustained on aerosol particles |
| title_full | Observations of bromine monoxide transport in the Arctic sustained on aerosol particles Peter K. Peterson, Denis Pöhler, Holger Sihler, Johannes Zielcke, Stephan General, Udo Frieß, Ulrich Platt, William R. Simpson, Son V. Nghiem, Paul B. Shepson, Brian H. Stirm, Suresh Dhaniyala, Thomas Wagner, Dana R. Caulton, Jose D. Fuentes, and Kerri A. Pratt |
| title_fullStr | Observations of bromine monoxide transport in the Arctic sustained on aerosol particles Peter K. Peterson, Denis Pöhler, Holger Sihler, Johannes Zielcke, Stephan General, Udo Frieß, Ulrich Platt, William R. Simpson, Son V. Nghiem, Paul B. Shepson, Brian H. Stirm, Suresh Dhaniyala, Thomas Wagner, Dana R. Caulton, Jose D. Fuentes, and Kerri A. Pratt |
| title_full_unstemmed | Observations of bromine monoxide transport in the Arctic sustained on aerosol particles Peter K. Peterson, Denis Pöhler, Holger Sihler, Johannes Zielcke, Stephan General, Udo Frieß, Ulrich Platt, William R. Simpson, Son V. Nghiem, Paul B. Shepson, Brian H. Stirm, Suresh Dhaniyala, Thomas Wagner, Dana R. Caulton, Jose D. Fuentes, and Kerri A. Pratt |
| title_in_hierarchy | Observations of bromine monoxide transport in the Arctic sustained on aerosol particles / Peter K. Peterson, Denis Pöhler, Holger Sihler, Johannes Zielcke, Stephan General, Udo Frieß, Ulrich Platt, William R. Simpson, Son V. Nghiem, Paul B. Shepson, Brian H. Stirm, Suresh Dhaniyala, Thomas Wagner, Dana R. Caulton, Jose D. Fuentes, and Kerri A. Pratt, |
| title_short | Observations of bromine monoxide transport in the Arctic sustained on aerosol particles |
| title_sort | observations of bromine monoxide transport in the arctic sustained on aerosol particles |
| url | http://dx.doi.org/10.5194/acp-17-7567-2017, https://www.atmos-chem-phys.net/17/7567/2017/ |