Influence of Stratospheric Air Masses on Radiotracers and Ozone over the Central Mediterranean
This work aims at determining the characteristics and the preferred source regions of stratospheric air masses at the Mt. Cimone (44°11’N, 10°42’E, 2165 m a.s.l.) WMO-GAW station located in the Italian northern Apennines, a site which is considered representative of Southern Europe-Mediterranean fre...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | http://hdl.handle.net/11585/607450 https://doi.org/10.1002/2017JD027036 http://onlinelibrary.wiley.com/doi/10.1002/2017JD027036/full |
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ftunibolognairis:oai:cris.unibo.it:11585/607450 2023-09-05T13:19:56+02:00 Influence of Stratospheric Air Masses on Radiotracers and Ozone over the Central Mediterranean BRATTICH, ERIKA TOSITTI, LAURA Orza, J. A. G. Cristofanelli, P. Bonasoni, P. Brattich, E. Orza, J. A. G. Cristofanelli, P. Bonasoni, P. Tositti, L. 2017 STAMPA http://hdl.handle.net/11585/607450 https://doi.org/10.1002/2017JD027036 http://onlinelibrary.wiley.com/doi/10.1002/2017JD027036/full eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000407900300027 volume:122 issue:13 firstpage:7164 lastpage:7182 numberofpages:19 journal:JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES http://hdl.handle.net/11585/607450 doi:10.1002/2017JD027036 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85022188426 http://onlinelibrary.wiley.com/doi/10.1002/2017JD027036/full radiotracer 7Be 7Be/210Pb back-trajectorie receptor modeling potential vorticity stratosphere-troposphere-exchange info:eu-repo/semantics/article 2017 ftunibolognairis https://doi.org/10.1002/2017JD027036 2023-08-21T20:37:27Z This work aims at determining the characteristics and the preferred source regions of stratospheric air masses at the Mt. Cimone (44°11’N, 10°42’E, 2165 m a.s.l.) WMO-GAW station located in the Italian northern Apennines, a site which is considered representative of Southern Europe-Mediterranean free troposphere. Source regions of high concentrations of 7Be, 7Be/210Pb and O3 and regions originating high potential vorticity values are analyzed by means of trajectory statistical methods applied over the time series collected in the period 1998-2011 to this aim. Our analysis points out the frequent occurrence of stratosphere-to-troposphere exchange in the North America and northern Atlantic region, which can be linked to the usual location of the polar-front and subtropical jet streams in these two regions, but also to the tropopause discontinuity and to the high cyclogenetic activity in the Atlantic region. High 7Be concentrations associated with trajectories of high-latitude origin descend from high altitudes to the study site, while at mid-latitudes trajectories arrive from relatively lower levels. The geographical distribution of the tropopause crossing of air masses before arriving the study site points out particularly to Greenland. Our results also suggest the importance of the interaction between upper level disturbances and the Alps mountain chains as a driver for stratosphere-to-troposphere exchange. In this case, the time between the tropopause crossing and the arrival at the elevated study site is less than 24 hours and frequently below 6 hours. The Atlas range in northern Africa plays a similar role though with lower influence. Article in Journal/Newspaper Greenland IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Greenland Journal of Geophysical Research: Atmospheres 122 13 7164 7182 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
radiotracer 7Be 7Be/210Pb back-trajectorie receptor modeling potential vorticity stratosphere-troposphere-exchange |
spellingShingle |
radiotracer 7Be 7Be/210Pb back-trajectorie receptor modeling potential vorticity stratosphere-troposphere-exchange BRATTICH, ERIKA TOSITTI, LAURA Orza, J. A. G. Cristofanelli, P. Bonasoni, P. Influence of Stratospheric Air Masses on Radiotracers and Ozone over the Central Mediterranean |
topic_facet |
radiotracer 7Be 7Be/210Pb back-trajectorie receptor modeling potential vorticity stratosphere-troposphere-exchange |
description |
This work aims at determining the characteristics and the preferred source regions of stratospheric air masses at the Mt. Cimone (44°11’N, 10°42’E, 2165 m a.s.l.) WMO-GAW station located in the Italian northern Apennines, a site which is considered representative of Southern Europe-Mediterranean free troposphere. Source regions of high concentrations of 7Be, 7Be/210Pb and O3 and regions originating high potential vorticity values are analyzed by means of trajectory statistical methods applied over the time series collected in the period 1998-2011 to this aim. Our analysis points out the frequent occurrence of stratosphere-to-troposphere exchange in the North America and northern Atlantic region, which can be linked to the usual location of the polar-front and subtropical jet streams in these two regions, but also to the tropopause discontinuity and to the high cyclogenetic activity in the Atlantic region. High 7Be concentrations associated with trajectories of high-latitude origin descend from high altitudes to the study site, while at mid-latitudes trajectories arrive from relatively lower levels. The geographical distribution of the tropopause crossing of air masses before arriving the study site points out particularly to Greenland. Our results also suggest the importance of the interaction between upper level disturbances and the Alps mountain chains as a driver for stratosphere-to-troposphere exchange. In this case, the time between the tropopause crossing and the arrival at the elevated study site is less than 24 hours and frequently below 6 hours. The Atlas range in northern Africa plays a similar role though with lower influence. |
author2 |
Brattich, E. Orza, J. A. G. Cristofanelli, P. Bonasoni, P. Tositti, L. |
format |
Article in Journal/Newspaper |
author |
BRATTICH, ERIKA TOSITTI, LAURA Orza, J. A. G. Cristofanelli, P. Bonasoni, P. |
author_facet |
BRATTICH, ERIKA TOSITTI, LAURA Orza, J. A. G. Cristofanelli, P. Bonasoni, P. |
author_sort |
BRATTICH, ERIKA |
title |
Influence of Stratospheric Air Masses on Radiotracers and Ozone over the Central Mediterranean |
title_short |
Influence of Stratospheric Air Masses on Radiotracers and Ozone over the Central Mediterranean |
title_full |
Influence of Stratospheric Air Masses on Radiotracers and Ozone over the Central Mediterranean |
title_fullStr |
Influence of Stratospheric Air Masses on Radiotracers and Ozone over the Central Mediterranean |
title_full_unstemmed |
Influence of Stratospheric Air Masses on Radiotracers and Ozone over the Central Mediterranean |
title_sort |
influence of stratospheric air masses on radiotracers and ozone over the central mediterranean |
publishDate |
2017 |
url |
http://hdl.handle.net/11585/607450 https://doi.org/10.1002/2017JD027036 http://onlinelibrary.wiley.com/doi/10.1002/2017JD027036/full |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000407900300027 volume:122 issue:13 firstpage:7164 lastpage:7182 numberofpages:19 journal:JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES http://hdl.handle.net/11585/607450 doi:10.1002/2017JD027036 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85022188426 http://onlinelibrary.wiley.com/doi/10.1002/2017JD027036/full |
op_doi |
https://doi.org/10.1002/2017JD027036 |
container_title |
Journal of Geophysical Research: Atmospheres |
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122 |
container_issue |
13 |
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7164 |
op_container_end_page |
7182 |
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