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314 results on '"Messeri G."'

1. Linking maize yields in Veneto Italy, to large-scale atmospheric variability, circulation regimes and weather types

Author

Salinger, M. J., primary, Verdi, L., additional, Dalla Marta, A., additional, Dalu, G., additional, Baldi, M., additional, Messeri, G., additional, Vallorani, R., additional, Morabito, M., additional, Crisci, A., additional, Altobelli, F., additional, Orlandini, S., additional, Gozzini, B., additional, and Messeri, A., additional

Published
2022
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5. UV radiation in Florence, Italy, (2004-2017) and its relationship with weather circulation types

Author

Grifoni D., Messeri G., Vallorani R., Iannuccilli M., Tei C., Sabatini F., Betti, Fibbi L., Gozzini B., and Zipoli G.

Subjects
weather type, UV
Abstract

Italy is one of the European nations characterized by the highest levels of ultraviolet radiation (UV) therefore it was important for both the resident population and the numerous tourists to know the risk level deriving from UV exposure. Based on these considerations starting from 2004 at the Institute of Biometorology of National Reasearch Council (IBIMET-CNR), in cooperation with the LaMMA Consortium, a continuous UV monitoring activity was started. The UV monitoring station was located in Sesto Fiorentino (43° 82' N, 11° 20' E, 40 m a.s.l.), a suburb of Florence, Tuscany (Central Italy). The radiometer used was the UVB-501 (Solar Light CO., Philadelphia, USA) with spectral response close to the erythemal action spectrum, periodically compared with a reference instruments (of the same type as the operational one) calibrated during international inter-comparison campaigns. Continuous measurements of erythemally effective UV radiation (also converted in UV Index) and averaged over 15-min intervals were performed starting from 2004 and stored in a database. On the basis of these 14 years of data an UV Index climatology was obtained. During the last few decades, weather circulation type classifications (CTCs) have been widely used to gain insight into processes at the synoptic scale, but also for studying the relationship between atmospheric circulation and surface climate variability. As at LaMMA, were evaluate the best performing CTCs based on COST733 software for the stratification of daily ground-level precipitation and surface air temperature across Italy, in this study we have done a very preliminary investigation on possible relationships between UV and such CTCs; especially in certain periods of the year a relationship between specific weather circulation and UV was present.

Published
2018

6. Circulation type classifications for temperature and precipitation stratification in Italy

Author

Vallorani R., Bartolini G., Betti G., Crisci A., Gozzini B., Grifoni D., Iannuccilli M., Messeri A., Messeri G., Morabito M., and Maracchi G.

Subjects
weather type, circulation classification, COST733, atmospheric circulation, temperature and precipitation in Italy, Italy
Abstract

During the last few decades, weather circulation type classi?cations (CTCs) have been widely used to gaininsight into processes at the synoptic scale, but also for studying the relationship between atmospheric circulation and surfaceclimate variability. This study aims to evaluate the best performing CTCs based on COST733 software for the strati?cation ofdaily ground-level precipitation and surface air temperature across Italy by means of four statistical metrics. Six classi?cationmethods belonging to the four COST733 groups (threshold-based, PCA-based, leader algorithms and optimization algorithms)were investigated on 32 and 26 data time series derived from Italian weather stations for daily mean temperature and daily meanprecipitation, respectively. CTCs were computed using gridded mean sea level pressure and geopotential height at 500 hPaderived from the NCEP Reanalysis 2 dataset between 1979 and 2015 and tested on three different numbers of classes (8/9, 11/12and 18 circulation types). Evaluation metrics showed an evident seasonal variability and high-spatial heterogeneity re?ectingthe geographical complexity of the Italian territory. The study points out that the best classi?cation, both for temperature andprecipitation, is strongly dependent on the classi?cation variable (mean sea level pressure and geopotential height at 500 hPa)showing relevant differences between surface temperature and precipitation. A low number of circulation types (8/9) resultedas the most appropriate grouping for the Italian domain and the Principal Component Transversal and Simulated Annealingwere the best performing classi?cation procedures for ground-level precipitation and temperature strati?cation, respectively.

Published
2018
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13. Rapporto meteorologico del mese luglio 2010

Author

Bartolini G., Capecchi V., Cristofori E., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tei C., Torrigiani T., and Vallorani R. e Gozzini B.

Published
2010

14. Rapporto meteorologico del mese maggio 2010

Author

Bartolini G., Capecchi V., Cristofori E., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tei C., Torrigiani T., and Vallorani R. e Gozzini B.

Published
2010

15. Rapporto meteorologico del mese ottobre 2010

Author

Bartolini G., Capecchi V., Cristofori E., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tei C., Torrigiani T., and Vallorani R. e Gozzini B.

Published
2010

20. Rapporto meteorologico del mese giugno 2010

Author

Bartolini G., Capecchi V., Cristofori E., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tei C., Torrigiani T., and Vallorani R. e Gozzini B.

Published
2010

22. Rapporto meteorologico del mese agosto 2010

Author

Bartolini G., Capecchi V., Cristofori E., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tei C., Torrigiani T., and Vallorani R. e Gozzini B.

Subjects
meteorologia
Published
2010

27. Rapporto meteorologico del mese luglio 2009

Author

Bartolini G., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tedici L., Tei C., and Vallorani R. e Gozzini B.

Subjects
meteorologia, luglio
Published
2009

28. Rapporto meteorologico del mese settembre 2009

Author

Bartolini G., Capecchi V., Cristofori E., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tedici L., Tei C., Torrigiani T., and Vallorani R. e Gozzini B.

Subjects
meteorologia, settembre
Published
2009

30. Rapporto meteorologico del mese agosto 2009

Author

Bartolini G., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tedici L., Tei C., and Vallorani R. e Gozzini B.

Subjects
meteorologia, agosto
Published
2009

34. Rapporto meteorologico del mese ottobre 2009

Author

Bartolini G., Capecchi V., Cristofori E., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tedici L., Tei C., Torrigiani T., and Vallorani R. e Gozzini B.

Subjects
meteorologia, ottobre
Published
2009

38. Rapporto meteorologico del mese ottobre 2008

Author

Bartolini G., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tei C., and Vallorani R. e Gozzini B

Subjects
ottobre 2008, mese, Rapporto, meteorologico
Published
2008

39. Rapporto meteorologico del mese novembre 2008

Author

Bartolini G., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tei C., and Vallorani R. e Gozzini B.

Subjects
novembre 2008, mese, Rapporto, meteorologico
Published
2008

46. Rapporto meteorologico del mese dicembre 2008

Author

Bartolini G., Grifoni D., Messeri G., Pasi F., Piani F., Rossi M., Tei C., and Vallorani R. e Gozzini B.

Subjects
mese, dicembre 2008, Rapporto, meteorologico
Published
2008

48. “Clima che muta zanzara in arrivo”

Author

Vallorani R., Crisci A., Messeri G., Gozzini B., Venturelli C., Mascali Zeo S., and Angelici P.

Subjects
Zanzara, Clima
Abstract

Fra le specie animali recentemente introdotte in Italia la zanzara tigre è cer-tamente una delle specie che ha avuto un impatto significativo. Nell'arco di un decennio si è diffusa in modo formidabile, anche grazie al vantaggio ecologico conferitole dalle recenti variazioni climatiche. È molto importante monitorarne la diffusione, vista anche la sua capacità di funzionare da vettore per diver-si virus patogeni. In questo contesto si inserisce questo studio per lo sviluppodi una modellistica di popolazione in grado di rapportare le condizioni meteo-climatiche alla diffusione della zanzara e al suo impatto sulla collettività.

Published
2008

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