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Castel Guelfo di Bologna, Italy

Dobricic S.,CMCC | Oddo P.,I.N.G.V. | Pinardi N.,I.N.G.V.
European Space Agency, (Special Publication) ESA SP

Recently the atmospheric pressure gradient forcing has been implemented in the oceanographic model used in the Mediterranean Forecasting System data assimilation scheme. Experiments show that there is an impact on how the temperature and salinity is updated in the assimilation when the ocean model is forced by the atmospheric pressure gradient. It is, however, necessary to perform longer data assimilation experiments to quantify the impact on the quality of the MFS analyses of the state of the Mediterranean Sea. © 2012 European Space Agency. Source

Borges G.,Graduate School Information Engineering | Stiubiener I.,CMCC
Proceedings - Frontiers in Education Conference, FIE

The information and communication technologies have become increasingly present in education, either as support for classroom learning, whether in distance learning. Among these technologies, software known as Learning Management Systems - LMS are used for better student-teacher communication and especially for providing instructional materials, activities, assessments and other resources to provide collaborative activities. Despite the large number of LMS' systems available nowadays, these environments and its tools are not always useful in the teaching-learning process. Moreover, every individual possesses a different personal Learning Style (LS), or, in other words, absorbs, processes, and transforms information into knowledge in different ways. When using these differences to recommend Learning Objects (LOs), we allow students access to educational resources that are more adequate to their teaching-learning processes. This article presents a system that utilizes a recommendation technique based on utility, or usefulness, to recommend LOs, stemming from three aspects: the subject the one wishes to learn, one's personal preferences and one's LS. At the end of this article the results of the experiment will be described, which demonstrate the importance of this approach, as well as future projects. © 2014 IEEE. Source

Fierli F.,CNR Institute of Neuroscience | Orlandi E.,CNR Institute of Neuroscience | Law K.S.,University of Versailles | Cagnazzo C.,CMCC | And 7 more authors.
Atmospheric Chemistry and Physics

We present the analysis of the impact of convection on the composition of the tropical tropopause layer region (TTL) in West-Africa during the AMMA-SCOUT campaign. Geophysica M55 aircraft observations of water vapor, ozone, aerosol and CO2 during August 2006 show perturbed values at altitudes ranging from 14 km to 17 km (above the main convective outflow) and satellite data indicates that air detrainment is likely to have originated from convective cloud east of the flights. Simulations of the BOLAM mesoscale model, nudged with infrared radiance temperatures, are used to estimate the convective impact in the upper troposphere and to assess the fraction of air processed by convection. The analysis shows that BOLAM correctly reproduces the location and the vertical structure of convective outflow. Model-aided analysis indicates that convection can influence the composition of the upper troposphere above the level of main outflow for an event of deep convection close to the observation site. Model analysis also shows that deep convection occurring in the entire Sahelian transect (up to 2000 km E of the measurement area) has a non negligible role in determining TTL composition. © 2011 Author(s). Source

Taillandier V.,French National Center for Scientific Research | Dobricic S.,CMCC | Testor P.,University Pierre and Marie Curie | Pinardi N.,I.N.G.V. | And 4 more authors.
Journal of Geophysical Research: Oceans

The impact of Argo float trajectory assimilation on the quality of ocean analyses is studied by means of an operational oceanographic model implemented in the Mediterranean Sea and a 3D-Var assimilation scheme. For the first time, both Argo trajectories and vertical profiles of temperature and salinity (TS) together with satellite altimeter data of sea level anomaly (SLA) are assimilated to produce analyses for shortterm forecasts. The study period covers 3 months during winter 2005 when four Argo trajectories were present in the northwestern Mediterranean Sea. The scheme is first assessed computing the misfits between observations and model forecast and analysis. The misfit statistics appear improved for float trajectories, while they are not degraded for the other assimilated variables (TS profiles and SLA). This indicates that the trajectory integration is consistent with the other components of the assimilation system and provides new information on horizontal pressure gradients. Comparisons between analyses obtained with and without trajectory assimilation suggest that trajectory assimilation can have an impact on the description of boundary currents and their instabilities, as well as mesoscale activity at regional scales. Changes are depicted by intermediate water mass redistributions, mesoscale eddy relocations, and net transport modulations. These impacts are detailed and assessed considering historical and simultaneous in situ data sets. The results motivate the integration of Argo trajectories in the operational Mediterranean Forecasting System. Copyright 2010 by the American Geophysical Union. Source

Fedele F.,ARPA Puglia | Fedele F.,University of Bari | Miglietta M.M.,CNR Institute of atmospheric Sciences and Climate | Perrone M.R.,University of Salento | And 5 more authors.
Atmospheric Research

Numerical simulations with the Advanced Research-Weather Research and Forecasting model (WRF-ARW) have been performed in order to simulate water vapor mixing ratio (WVMR) vertical profiles over southeastern Italy. An optimal setup of the model has been identified changing the default model land cover database and using a fine model vertical resolution in the lower levels. Among different tests, the selected implementation is the one that best reproduced the experimental WVMR profiles retrieved from the Brindisi radiosounding station and the ground-based Raman lidar measurements at Lecce site.The use of the WRF model to simulate WVMR profiles along the tracks of the spaceborne lidar CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) on two case studies has revealed that numerical models are reliable tools, particularly useful when no ground measurements of water vapor are available. In particular, it is shown that the inhomogeneous distribution of moisture in the domain, as emerging from the model simulations, may significantly affect the CALIOP validation procedures. Such procedures are based on the intercomparison of the satellite retrieved aerosol profiles with those measured, nearly at the same time, with a ground-based lidar located few km away from the sites where CALIOP aerosol products are delivered in the selected events. © 2015 Elsevier B.V. Source

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