600 research outputs found
Factors affecting the quality of QPF: a multi-method verification of multi-configuration BOLAM reforecasts against MAP D-PHASE observations
No full textThis paper discusses the results of a quantitative precipitation forecast (QPF) verification study aimed
at comparing different alternative new configurations of the meteorological BOlogna Limited Area Model (BOLAM)
to be implemented in 2013 into the ISPRA’s Hydro-Meteo-Marine forecasting system (SIMM) in place of the currently
operational version, dated 2009. Five new configurations are defined after considering several combinations of the following
model settings: horizontal grid spacing, domain extension, initial and boundary conditions, nesting design and the BOLAM
code version. Such testing configurations are inter-compared with the operational BOLAM version following a multi-method
approach including Fourier spectral analysis, several categorical scores, quasi-relative operating characteristic diagram and
visual inspection of the spatial distributions of the contingency table elements. Rain gauge measurements available between
June and November 2007 within the international initiative ‘Demonstration of Probabilistic Hydrological and Atmospheric
Simulation of flood Events in the Alpine region’ of the Mesoscale Alpine Programme (MAP D-PHASE) are considered as
observational dataset. A 6month reforecast campaign is performed in order to produce, for each compared configuration,
the corresponding forecast series. Results show that decreasing model grid spacing and simultaneously increasing model
domain extension is effective in improving the QPF quality when higher-resolution initial and boundary conditions are
directly applied to BOLAM, without using a coarser-resolution parent model run. Therefore, such skilful configuration has
been deployed in late 2012 within the international research programme ‘HYdrological cycle in Mediterranean EXperiment’
(HyMeX). On the contrary, when keeping the low-resolution, double nesting configuration, improving input data decreases
the QPF performance
Coherent structures in a baroclinic atmosphere
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1985.Microfiche copy available in Archives and Science.Bibliography: leaves 127-130.by Piero Malguzzi.Ph.D
On the correct surface stress for the prediction of the wind wave field and the storm surge in the Northern Adriatic Sea
No full textThis paper discusses which formulation of the surface stress over the sea determines the most accurate prediction of the wind wave field and storm surge in
the Northern Adriatic Sea. The study shows that the results of the storm surge and wind wave models, when compared to the available observations, can be used for the validation of the surface stress and of the expression adopted for the ssr (sea surface roughness). The results are representative of short fetch and young wind sea conditions. The agreement between the results and the measurements shows the feasibility of the wind wave and storm surge predictions in the Adriatic Sea and supports the dependence of the ssr, and, therefore, of the surface stress, on the spectrum of the surface wave
Effects of Increasing Horizontal Resolution in a Convection Permitting Model on Flood Forecasting: The 2011 Dramatic Events in Liguria, Italy
No full textCoupling meteorological and hydrological models is a common and standard practice in the field of flood forecasting. In this study, a numerical weather prediction (NWP) chain based on the BOLogna Limited Area Model (BOLAM) and the MOdello LOCale in Hybrid coordinates (MOLOCH) was coupled with the operational hydrological forecasting chain of the Ligurian Hydro-Meteorological Functional Centre to simulate two major floods that occurred during autumn 2011 in northern Italy. Different atmospheric simulations were performed by varying the grid spacing (between 1.0 and 3.0 km) of the high-resolution meteorological model and the set of initial/boundary conditions driving the NWP chain. The aim was to investigate the impact of these parameters not only from a meteorological perspective, but also in terms of discharge predictions for the two flood events. The operational flood forecasting system was thus used as a tool to validate in a more pragmatic sense the quantitative precipitation forecast obtained from different configurations of the NWP system. The results showed an improvement in flood prediction when a high-resolution grid was employed for atmospheric simulations. In turn, a better description of the evolution of the precipitating convective systems was beneficial for the hydrological prediction. Although the simulations underestimated the severity of both floods, the higher-resolution model chain would have provided useful information to the decision-makers in charge of protecting citizens
Piero Sraffa and His Books – a foreword to the Catalogue of his inimitable library
No full textThis foreword gives a preview of the sort of books Piero Sraffa collected, specifying the criteria that appear to have been used for the selection. The Author of this foreword is convinced that the discovery of these criteria may help to understand the basis of the type of history of economic thought that Piero Sraffa had in mind
Piero Vignozzi, o dell'impronta residua
No full textThe author considers the tendency in the d'après by Piero Vignozzi to elide elements of well-known works by old masters, and concludes that we are seeing a reflection of Robert Rauschenberg's Erased de Kooning Drawing
Esserci e temporalità ne «La figlia di Babilonia» di Piero Bigongiari
No full textBeing there and temporality in La figlia di Babilonia of Piero Bigongiari · In this paper the author takes on Piero Bigongiari’s book of poetry La figlia di Babilonia (1942) by means of the categories of being-there and temporality by Martin Heidegger. Through an analysis of the Tuscan poet’s essays and interviews and foremost through the most important texts of this book poetry, the author shows how hermetic poetic is deeply rooted in the diffusion of German existentialism in Ital
Il Ponte di Piero Calamandrei
No full textThe paper traces the history of the journal Il Ponte, founded by Piero Calamandrei in April 1945, in order to capture the ideal roots of this audacious publishing initiative. The Author focuses on the liberal-socialist vocation of the journal and on the ideals of European federalism that led Calamandrei to oppose the Atlantic Pact. Lastly, he delves into the commitment of the Florentine jurist in support of the Constitution, democracy and the Welfare State
Oratione di m. Piero Vettori in lode di Massimiliano ij. imperadore, morto : recitata nella chiesa di San Lorenzo, il di xij. di nouembre, M D LXXVI /
No full textT.p. woodcut with Medici arms impaling Austria. Two historiated initials.Mode of access: Internet.At upper left-hand corner of front pastedown is bookplate of Giacomo Manzoni (Gelli 636).Binding: 19th-century pebble-grained red cloth. Red goatskin spine with author, title, and imprint in gilt. Leaves numbered 206-217 in black ink at upper right-hand corner of rectos, implying that the work was formerly bound as part of a larger vol
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