Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe
Annual and interannual variations of ozone in the upper troposphere and lower stratosphere (UTLS) region have been studied using ozonesonde data collected between 1994 and 2001 at several northern European stations. The climatology of ozone exhibits a prominent annual cycle in the UTLS region. The o...
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ftawi:oai:epic.awi.de:6978 2023-09-05T13:17:44+02:00 Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe Rao, T. N. Kirkwood, S. Arvelius, J. Kivi, R. von der Gathen, Peter 2003 https://epic.awi.de/id/eprint/6978/ https://doi.org/10.1029/2003JD003860 https://hdl.handle.net/10013/epic.17523 unknown Rao, T. N. , Kirkwood, S. , Arvelius, J. , Kivi, R. and von der Gathen, P. orcid:0000-0001-7409-1556 (2003) Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe , Journal of Geophysical ResearchD22), 108 . doi:10.1029/2003JD003860 <https://doi.org/10.1029/2003JD003860> , hdl:10013/epic.17523 EPIC3Journal of Geophysical ResearchD22), 108, 4703 p. Article isiRev 2003 ftawi https://doi.org/10.1029/2003JD003860 2023-08-22T19:46:28Z Annual and interannual variations of ozone in the upper troposphere and lower stratosphere (UTLS) region have been studied using ozonesonde data collected between 1994 and 2001 at several northern European stations. The climatology of ozone exhibits a prominent annual cycle in the UTLS region. The observed change in the phase of the annual cycle from late spring-early summer at 500 hPa to spring at 200 hPa and to winter-early spring at 100 hPa shows the switching of the ozone control from photochemical to dynamical. Traces of interannual variation in the lower stratosphere are seen not only in the upper troposphere but also in the middle troposphere (not necessarily always) indicating the dynamical influence on tropospheric ozone budget. Further, the correlation between ozone mixing ratio and potential vorticity (PV) is studied at three northern high-latitude stations. As expected, a good correlation is found in the lower stratosphere, while the correlation is fair in the middle troposphere, except during summer over the European Arctic. This weak correlation at high latitudes indicates the dominance of photochemistry over dynamics in the presence of prolonged hours of solar illumination. The correlation coefficients derived at high latitudes are smaller than those reported at midlatitudes. This could be due to the greater number of tropopause folds at midlatitudes than at high latitudes and this eventually leads to the conclusion that the downward cross-tropopause flux is greater at midlatitudes than at high latitudes. Absence of a significant north-south gradient in the ozone/PV ratio in the lower stratosphere suggests that a single ozone/PV ratio (however, the ratio varies with month) can be used to convert global PV fluxes to ozone fluxes. A few cases of tropopause folds (only one case study is reported in the present study) are selected and studied in detail with the help of a very high frequency radar and meteorological analysis. The ratio between ozone and PV for these case studies agrees reasonably well ... Article in Journal/Newspaper Arctic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Journal of Geophysical Research: Atmospheres 108 D22 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Annual and interannual variations of ozone in the upper troposphere and lower stratosphere (UTLS) region have been studied using ozonesonde data collected between 1994 and 2001 at several northern European stations. The climatology of ozone exhibits a prominent annual cycle in the UTLS region. The observed change in the phase of the annual cycle from late spring-early summer at 500 hPa to spring at 200 hPa and to winter-early spring at 100 hPa shows the switching of the ozone control from photochemical to dynamical. Traces of interannual variation in the lower stratosphere are seen not only in the upper troposphere but also in the middle troposphere (not necessarily always) indicating the dynamical influence on tropospheric ozone budget. Further, the correlation between ozone mixing ratio and potential vorticity (PV) is studied at three northern high-latitude stations. As expected, a good correlation is found in the lower stratosphere, while the correlation is fair in the middle troposphere, except during summer over the European Arctic. This weak correlation at high latitudes indicates the dominance of photochemistry over dynamics in the presence of prolonged hours of solar illumination. The correlation coefficients derived at high latitudes are smaller than those reported at midlatitudes. This could be due to the greater number of tropopause folds at midlatitudes than at high latitudes and this eventually leads to the conclusion that the downward cross-tropopause flux is greater at midlatitudes than at high latitudes. Absence of a significant north-south gradient in the ozone/PV ratio in the lower stratosphere suggests that a single ozone/PV ratio (however, the ratio varies with month) can be used to convert global PV fluxes to ozone fluxes. A few cases of tropopause folds (only one case study is reported in the present study) are selected and studied in detail with the help of a very high frequency radar and meteorological analysis. The ratio between ozone and PV for these case studies agrees reasonably well ... |
format |
Article in Journal/Newspaper |
author |
Rao, T. N. Kirkwood, S. Arvelius, J. Kivi, R. von der Gathen, Peter |
spellingShingle |
Rao, T. N. Kirkwood, S. Arvelius, J. Kivi, R. von der Gathen, Peter Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe |
author_facet |
Rao, T. N. Kirkwood, S. Arvelius, J. Kivi, R. von der Gathen, Peter |
author_sort |
Rao, T. N. |
title |
Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe |
title_short |
Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe |
title_full |
Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe |
title_fullStr |
Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe |
title_full_unstemmed |
Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe |
title_sort |
climatology of utls ozone and the ratio of ozone and potential vorticity over northern europe |
publishDate |
2003 |
url |
https://epic.awi.de/id/eprint/6978/ https://doi.org/10.1029/2003JD003860 https://hdl.handle.net/10013/epic.17523 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
EPIC3Journal of Geophysical ResearchD22), 108, 4703 p. |
op_relation |
Rao, T. N. , Kirkwood, S. , Arvelius, J. , Kivi, R. and von der Gathen, P. orcid:0000-0001-7409-1556 (2003) Climatology of UTLS Ozone and the ratio of ozone and potential vorticity over northern Europe , Journal of Geophysical ResearchD22), 108 . doi:10.1029/2003JD003860 <https://doi.org/10.1029/2003JD003860> , hdl:10013/epic.17523 |
op_doi |
https://doi.org/10.1029/2003JD003860 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
108 |
container_issue |
D22 |
_version_ |
1776198796507611136 |