Stratospheric intrusion index (SI2) from baseline measurement data

This work introduces an index to identify deep stratospheric intrusions (SI) from measurement data alone, without requiring additional model-based information. This stratospheric intrusion index (SI2) provides a qualitative description of SI event behaviour by summarizing the information from different tracer variations. Moreover, being independent from any model constraint, the SI2 can also represent a valid tool to help in evaluating the capacity of chemistry-transport and chemistry-climate models in simulating deep stratosphere to troposphere transport. The in situ variations of ozone, beryllium-7 and relative humidity were used to calculate the index. The SI2 was applied on 8-year data recorded at the regional GAW station of Mt. Cimone (2165 m asl; 44.10N, 10.70E: Italy). The comparison of the SI2 behaviour with a pre-existing database obtained by also using model products, permitted us to tune a SI2-threshold value capable of identifying SI events efficiently. In good agreement with previous climatological studies across Europe, at Mt. Cimone, the averaged monthly SI frequency obtained by the SI2 analysis showed a clear seasonal cycle with a winter maximum and a spring-summer minimum. These results suggest that the presented methodology is efficient for both identifying SI events and evaluating their annual frequency at the considered baseline measurement site.
 
Citation proposal
Paolo Cristofanelli (Institute of Atmospheric Sciences and Climate (ISAC) - CNR) - Francescopiero Calzolari (Institute of Atmospheric Sciences and Climate (ISAC) - CNR) - Ubaldo Bonafè (Institute of Atmospheric Sciences and Climate (ISAC) - CNR) - Rocco Duchi (Institute of Atmospheric Sciences and Climate (ISAC) - CNR) - Fabrizio Roccato (Institute of Atmospheric Sciences and Climate (ISAC) - CNR) - Laura Tositti (Environmental Radiochemistry Laboratory, Chemistry Department, Bologna University,) - Paolo Bonasoni (Institute of Atmospheric Sciences and Climate (ISAC) - CNR) - Angela Marinoni (Institute of Atmospheric Sciences and Climate (ISAC) - CNR) (2009) . Stratospheric intrusion index (SI2) from baseline measurement data. https://geoportal.mountaingenius.org/geonetwork/srv/api/records/0f147480-cf6f-41ff-bc70-4e837c731618
 

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Date ( Publication )
2009-08-11T00:00:00
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Name
Theoretical and Applied Climatology Volume 97
Issue identification
3-4
Page
317-325
Collective title
Theoretical and Applied Climatology Volume 97
ISBN
ISSN
0177-798X
Purpose
Theoretical and Applied Climatology covers climate modeling, climatic changes and climate forecasting, micro- to mesoclimate, applied meteorology as in agro- and forestmeteorology, biometeorology, building meteorology and atmospheric radiation problems as they relate to the biosphere; effects of anthropogenic and natural aerosols or gaseous trace constituents; hardware and software elements of meteorological measurements, including techniques of remote sensing, among other topics of current interest.
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Keywords ( Discipline )
  • Global Change , Climatology , Pollution , Climate Change , Meteorology
Keywords ( Theme )
  • deep stratospheric intrusions , seasonal cycle , index stratospheric intrusion , chemistry-climate models
Keywords ( Place )
  • Mt. Cimone
Keywords
  • SHARE , GAW
Keywords
  • High station
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  • Climatology, meteorology, atmosphere
  • Environment
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Abstract :"Stratospheric intrusion index (SI2) from baseline measurement data."  

Abstract :"Stratospheric intrusion index (SI2) from baseline measurement data."

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“Stratospheric intrusion index (SI2) from baseline measurement data”.

P. Cristofanelli, F. Calzolari, U. Bonafè, R. Duchi, A. Marinoni, F. Roccato, L. Tositti and P. Bonasoni

THEORETICAL AND APPLIED CLIMATOLOGY

Volume 97, Numbers 3-4, 317-325, DOI: 10.1007/s00704-008-0073-x

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2012-03-09T12:45:38
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