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Lombroso, L.
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Lombroso, L.
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- PublicationRestrictedOne year of AERONET sun-photometric measurements at Lampedusa site: monthly averaged AOT comparison with satellite data and Saharan dust events detection(2004)
; ; ; ; ; ; ;Corradini, S.; Università di Modena e Reggio Emilia ;Carboni, E.; Institute of Atmospheric Sciences and Climate (ISAC-CNR) ;Guerrieri, L.; Università di Modena e Reggio Emilia ;Lombroso, L.; Università di Modena e Reggio Emilia ;Pugnaghi, S.; Università di Modena e Reggio Emilia ;Santangelo, R.; Università di Modena e Reggio Emilia; ; ; ; ; In this work, one year (May 2003 – May 2004) of measurements collected by AERONET #172 sun-photometer in Lampedusa has been analyzed. The computed monthly averaged Aerosol Optical Depth (AOD) has been compared with MODIS AOD retrieval. Using both AOD and Angström coefficients, Saharan dust events has been detected and meteorologically analyzed by means the NOAA HSPLIT 4 lagrangian trajectories and synoptic analysis.298 24 - PublicationOpen AccessGPS Zenith Total Delays and Precipitable Water in comparison with special meteorological observations in Verona (Italy)during MAP-SOP(2002)
; ; ; ; ; ; ; ; ;Boccolari, M.; DIMA -Osservatorio Geofisico (OGMO),Università di Modena e Reggio Emilia,Italy ;Fazlagic, S.; DIMA -Osservatorio Geofisico (OGMO),Università di Modena e Reggio Emilia,Italy ;Frontero, P.; ARPAV Department of Verona Province,Verona,Italy ;Lombroso, L.; DIMA -Osservatorio Geofisico (OGMO),Università di Modena e Reggio Emilia,Italy ;Pugnaghi, S.; DIMA -Osservatorio Geofisico (OGMO),Università di Modena e Reggio Emilia,Italy ;Santangelo, R.; DIMA -Osservatorio Geofisico (OGMO),Università di Modena e Reggio Emilia,Italy ;Corradini, S.; DIMA -Osservatorio Geofisico (OGMO),Università di Modena e Reggio Emilia,Italy ;Teggi, S.; DIMEC -Università di Modena e Reggio Emilia,Italy; ; ; ; ; ; ; Continuous meteorological examination of the Pre-Alpine zones in Northern Italy (Po Valley)is important for determination of atmospheric water cycles connected with floods and rainfalls.During a special meteorological observing period (MAP-SOP),radiosounding and other measurements were made in the site of Verona (Italy). This paper deals with Zenith Total Delay (ZTD)and Precipitable Water (PW)comparisons obtained by GPS, radiosounding and other meteorological measurements.PW and ZTD from ground-based GPS data in comparisonwith classical techniques (e.g.,WVR,radiosounding)from recent literature present an accurate tool for use in meteorology applications (e.g.,assimilation in Numerical Weather Prediction (NWP)models on short-range precipitation forecasts).Comparison of such ZTD for MAP-SOP showed a standard deviation of 16.1 mm and PW comparison showed a standard deviation of 2.7 mm,confirming the accuracy of GPS measurements for meteorology applications.In addition,PW data and its time variation are also matched with time series of meteorological situations.Those results indicate that changes in PW values could be connected to changes in air masses,i.e.to passages of both cold and warm fronts.There is also a correlation between precipitation, forthcoming increase and the following decrease of PW.A good agreement between oscillation of PW and precipitation and strong cyclonic activities is found.245 537 - PublicationOpen AccessContinuous photometric observations at ENEA base in Lampedusa to estimate precipitable water(2003)
; ; ; ; ; ;Santangelo, R.; Dipartimento di Ingegneria dei Materiali e dell Ambiente (Osservatorio Geofi sico), Università di Modena e Reggio Emilia, Modena, Italy ;Pugnaghi, S.; Dipartimento di Ingegneria dei Materiali e dell Ambiente (Osservatorio Geofi sico), Università di Modena e Reggio Emilia, Modena, Italy ;Corradini, S.; Dipartimento di Ingegneria dei Materiali e dell Ambiente (Osservatorio Geofi sico), Università di Modena e Reggio Emilia, Modena, Italy ;Lombroso, L.; Dipartimento di Ingegneria dei Materiali e dell Ambiente (Osservatorio Geofi sico), Università di Modena e Reggio Emilia, Modena, Italy ;Teggi, S.; Dipartimento di Ingegneria dei Materiali e dell Ambiente (Osservatorio Geofi sico), Università di Modena e Reggio Emilia, Modena, Italy; ; ; ; Water vapour is a variable component of the atmosphere both in space and time. It is one of the most important components because of its effects in many fi elds: Meteorology, Climatology, Remote Sensing, Energy-Budget, Hydrology, etc. This work compares radiometric (sun photometer) readings, Global Positioning System (GPS) data and a meteorological model forecasted data. The aim is to understand if GPS measurements may help Numerical Weather Prediction (NWP) models. It is well known that GPS measurements are affected by the so-called tropospheric delay. Part of it, the so-called wet delay is related mainly to the amount of water vapour along the path of the GPS signal through the troposphere. Precise knowledge of the abundance of water vapour, in space and time, is important for NWP model because water vapour is the predecessor of precipitation. Despite the high variability of water vapour compared to other meteorological fi elds, like pressure and wind, water vapour observations are scarce, so that additional measurements of water vapour are expected to benefi t meteorology. A new sun photometer, which is part of the AERONET (AErosol and RObotic NETwork) program, has been installed at the ENEA (Ente per le Nuove tecnologie, l'Energia e l'Ambiente) base of Lampedusa Island. The sun photometer is quite close (less then 4 km) to an ASI (Agenzia Spaziale Italiana) GPS permanent receiver. A long record (summer period of the year 2000) of sun photometric measurements is available for the station at Lampedusa. We found that the GPS and sun photometric data are better correlated (std. dev. about 10 mm for the wet delay) than are the GPS measurements with the NWP model predictions. This is an indication that GPS delay data may contain information useful for weather prediction.194 294