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Evidence for HBr production due to minor channel branching at mid‐latitudes
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| Zeitschriftentitel: | Geophysical Research Letters |
|---|---|
| Personen und Körperschaften: | , |
| In: | Geophysical Research Letters, 25, 1998, 1, S. 55-58 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
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| Schlagwörter: |
| author_facet |
Chartrand, D. J. McConnell, J. C. Chartrand, D. J. McConnell, J. C. |
|---|---|
| author |
Chartrand, D. J. McConnell, J. C. |
| spellingShingle |
Chartrand, D. J. McConnell, J. C. Geophysical Research Letters Evidence for HBr production due to minor channel branching at mid‐latitudes General Earth and Planetary Sciences Geophysics |
| author_sort |
chartrand, d. j. |
| spelling |
Chartrand, D. J. McConnell, J. C. 0094-8276 1944-8007 American Geophysical Union (AGU) General Earth and Planetary Sciences Geophysics http://dx.doi.org/10.1029/97gl03355 <jats:p>Recently, <jats:italic>Nolt et al.</jats:italic> [1997] have presented HBr measurements over the height range 20–36 km. We have compared model calculations with these measurements and find definitive evidence for non‐zero branching ratios for HBr production from either HO<jats:sub>2</jats:sub>+BrO, k<jats:sub>1<jats:italic>b</jats:italic></jats:sub>, or OH+BrO, k<jats:sub>2<jats:italic>b</jats:italic></jats:sub>. For k<jats:sub>1<jats:italic>b</jats:italic></jats:sub>, best agreement between modelled and observed HBr concentrations is obtained if the branching ratio increases from ∼0.4% at 20 km, to about 2% at 34 km with no additional contribution from the OH+BrO branch. However, a height‐independent value of 1% also produces reasonable results. This branching ratio contradicts the study of <jats:italic>Mellouki et al.</jats:italic> [1994]. For OH+BrO, the best value of k<jats:sub>2<jats:italic>b</jats:italic></jats:sub> appears to be 2–3%, if k<jats:sub>1<jats:italic>a</jats:italic></jats:sub> = 0 which is comparable to the recently determined branching ratio for HCl production from the analogous chlorine reaction, OH+ClO.</jats:p> Evidence for HBr production due to minor channel branching at mid‐latitudes Geophysical Research Letters |
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American Geophysical Union (AGU), 1998 |
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Geophysical Research Letters |
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| title |
Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_unstemmed |
Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_full |
Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_fullStr |
Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_full_unstemmed |
Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_short |
Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_sort |
evidence for hbr production due to minor channel branching at mid‐latitudes |
| topic |
General Earth and Planetary Sciences Geophysics |
| url |
http://dx.doi.org/10.1029/97gl03355 |
| publishDate |
1998 |
| physical |
55-58 |
| description |
<jats:p>Recently, <jats:italic>Nolt et al.</jats:italic> [1997] have presented HBr measurements over the height range 20–36 km. We have compared model calculations with these measurements and find definitive evidence for non‐zero branching ratios for HBr production from either HO<jats:sub>2</jats:sub>+BrO, k<jats:sub>1<jats:italic>b</jats:italic></jats:sub>, or OH+BrO, k<jats:sub>2<jats:italic>b</jats:italic></jats:sub>. For k<jats:sub>1<jats:italic>b</jats:italic></jats:sub>, best agreement between modelled and observed HBr concentrations is obtained if the branching ratio increases from ∼0.4% at 20 km, to about 2% at 34 km with no additional contribution from the OH+BrO branch. However, a height‐independent value of 1% also produces reasonable results. This branching ratio contradicts the study of <jats:italic>Mellouki et al.</jats:italic> [1994]. For OH+BrO, the best value of k<jats:sub>2<jats:italic>b</jats:italic></jats:sub> appears to be 2–3%, if k<jats:sub>1<jats:italic>a</jats:italic></jats:sub> = 0 which is comparable to the recently determined branching ratio for HCl production from the analogous chlorine reaction, OH+ClO.</jats:p> |
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| author | Chartrand, D. J., McConnell, J. C. |
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| author_sort | chartrand, d. j. |
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| description | <jats:p>Recently, <jats:italic>Nolt et al.</jats:italic> [1997] have presented HBr measurements over the height range 20–36 km. We have compared model calculations with these measurements and find definitive evidence for non‐zero branching ratios for HBr production from either HO<jats:sub>2</jats:sub>+BrO, k<jats:sub>1<jats:italic>b</jats:italic></jats:sub>, or OH+BrO, k<jats:sub>2<jats:italic>b</jats:italic></jats:sub>. For k<jats:sub>1<jats:italic>b</jats:italic></jats:sub>, best agreement between modelled and observed HBr concentrations is obtained if the branching ratio increases from ∼0.4% at 20 km, to about 2% at 34 km with no additional contribution from the OH+BrO branch. However, a height‐independent value of 1% also produces reasonable results. This branching ratio contradicts the study of <jats:italic>Mellouki et al.</jats:italic> [1994]. For OH+BrO, the best value of k<jats:sub>2<jats:italic>b</jats:italic></jats:sub> appears to be 2–3%, if k<jats:sub>1<jats:italic>a</jats:italic></jats:sub> = 0 which is comparable to the recently determined branching ratio for HCl production from the analogous chlorine reaction, OH+ClO.</jats:p> |
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| imprint | American Geophysical Union (AGU), 1998 |
| imprint_str_mv | American Geophysical Union (AGU), 1998 |
| institution | DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275 |
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| physical | 55-58 |
| publishDate | 1998 |
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| series | Geophysical Research Letters |
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| spelling | Chartrand, D. J. McConnell, J. C. 0094-8276 1944-8007 American Geophysical Union (AGU) General Earth and Planetary Sciences Geophysics http://dx.doi.org/10.1029/97gl03355 <jats:p>Recently, <jats:italic>Nolt et al.</jats:italic> [1997] have presented HBr measurements over the height range 20–36 km. We have compared model calculations with these measurements and find definitive evidence for non‐zero branching ratios for HBr production from either HO<jats:sub>2</jats:sub>+BrO, k<jats:sub>1<jats:italic>b</jats:italic></jats:sub>, or OH+BrO, k<jats:sub>2<jats:italic>b</jats:italic></jats:sub>. For k<jats:sub>1<jats:italic>b</jats:italic></jats:sub>, best agreement between modelled and observed HBr concentrations is obtained if the branching ratio increases from ∼0.4% at 20 km, to about 2% at 34 km with no additional contribution from the OH+BrO branch. However, a height‐independent value of 1% also produces reasonable results. This branching ratio contradicts the study of <jats:italic>Mellouki et al.</jats:italic> [1994]. For OH+BrO, the best value of k<jats:sub>2<jats:italic>b</jats:italic></jats:sub> appears to be 2–3%, if k<jats:sub>1<jats:italic>a</jats:italic></jats:sub> = 0 which is comparable to the recently determined branching ratio for HCl production from the analogous chlorine reaction, OH+ClO.</jats:p> Evidence for HBr production due to minor channel branching at mid‐latitudes Geophysical Research Letters |
| spellingShingle | Chartrand, D. J., McConnell, J. C., Geophysical Research Letters, Evidence for HBr production due to minor channel branching at mid‐latitudes, General Earth and Planetary Sciences, Geophysics |
| title | Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_full | Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_fullStr | Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_full_unstemmed | Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_short | Evidence for HBr production due to minor channel branching at mid‐latitudes |
| title_sort | evidence for hbr production due to minor channel branching at mid‐latitudes |
| title_unstemmed | Evidence for HBr production due to minor channel branching at mid‐latitudes |
| topic | General Earth and Planetary Sciences, Geophysics |
| url | http://dx.doi.org/10.1029/97gl03355 |