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Application of the Bayesian Calibration Methodology for the Parame...

By: Y. Conrad; N. Fohrer

Description: Department of Hydrology and Water Resources Management, Ecology Centre at the University of Kiel, Kiel, Germany. This study provides results for the optimization strategy of highly parameterized models, especially with a high number of unknown input parameters and joint problems in terms of sufficient parameter space. Consequently, the uncertainty in model parameterization and measurements must be considered when highly variable nitrogen losses, e.g. N l...

Büchter, M.: Nitratauswaschungen unter Grünland und Silomais in Monokultur auf sandigen Böden Norddeutschlands. Ph.D. thesis, University of Kiel, Germany, Schriftenreihe des Instituts für Pflanzenbau und Pflanzenzüchtung – Grünland und Futterbau/Ökologischer Landbau (in German, English summary), 30, 1–116, 2003.; Casper, M.: Die Identifikation hydrologischer Prozesse im Einzugsgebiet des Dürreychbaches (Nordschwarzwald). Mitteilungen des Instituts für Wasserwirtschaft un...

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The Surface Climatology of the Eastern Mediterranean Region Obtain...

By: P. Alpert; K. Bassat; P. Kunin; S. O. Krichak

Description: Department of Geophysics and Planetary Sciences, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel. Two configurations of RegCM3 regional climate model (RCM) have been used to downscale results of two atmosphere-ocean global climate model (AOGCM) simulations of the current (1961–1990) and future climates (2071–2100) over the eastern Mediterranean (EM) region. The RCM domain covering the EM region from northern A...

Alpert, P., Price, C., Krichak, S. O., Ziv, B., Saaroni, H., Osetinsky, I., Barkan, J., and Kishcha, P.: Tropical tele-connections to the Mediterranean climate and weather, Adv. Geosci., 2, 157–160, 2005.; Atlas, R., Reale, O, Shen, B. W., Lin, S. J., Chern, J. D., Putman, W. T., Lee, T., Yeh, K. S., Bosilovich, M., and Radakovich, J.: Hurricane forecasting with the high-resolution NASA finite volume general circulation model, Geophys. Res. Lett., 32(3), L03807, doi:10.1...

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Calibration and Uncertainty Issues of a Hydrological Model (Swat) ...

By: K. C. Abbaspour; J. Schuol

Description: Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland. Distributed hydrological models like SWAT (Soil and Water Assessment Tool) are often highly over-parameterized, making parameter specification and parameter estimation inevitable steps in model calibration. Manual calibration is almost infeasible due to the complexity of large-scale models with many objectives. Therefore we used a multi-site semi-automated inverse modelli...

Di Luzio, M., Srinivasan, R., and Arnold, J. G.: ArcView interface for SWAT2000 – User's guide, Blackland Research Center, Temple, Texas, 2001.; Abbaspour, K. C., Johnson, C. A., and van Genuchten, M. T.: Estimating uncertain flow and transport parameters using a sequential uncertainty fitting procedure, Vadose Zone J., 3, 1340–1352, 2004.; Alcamo, J., Döll, P., Henrichs, T., Kaspar, F., Lehner, B., Rösch, T., and Siebert, S.: Development and testing of the WaterGAP 2 gl...

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The Influence of the New Ecmwf Ensemble Prediction System Resoluti...

By: P. Pinson; S. Sperati; S. Alessandrini

Description: RSE, Ricerca Sistema Energetico, Milano, Italy. The importance of wind power forecasting (WPF) is nowadays commonly recognized because it represents a useful tool to reduce problems of grid integration and to facilitate energy trading. If on one side the prediction accuracy is fundamental to these scopes, on the other it has become also clear that a reliable estimation about their uncertainty is paramount. In fact prediction accuracy is unfortunately no...

Alessandrini, S., Decimi, G., and Ronzio, D.: Studio della relazione energia producibile/prodotta per un campo eolico su terreno complesso con modelli meteorologici dinamici, Rapporto di Ricerca RSE no. 10000262, 2010.; Alessandrini, S., Pinson, P., Hagedorn, R., Decimi, G., and Sperati, S.: An application of ensemble/multi model approach for wind power production forecasting, Adv. Sci. Res., 6, 35–37, doi:10.5194/asr-6-35-...

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Recent Variation of the Las Vacas Glacier Mt. Aconcagua Region, Ce...

By: L. Lenzano; J. C. Leiva; M. G. Lenzano

Description: Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA) – CONICET, Mendoza, Argentina. This work presents the results of the ASTER stereoscopic image processing to calculate the volume changes of Las Vacas Glacier. The processing of medium resolution satellite images (ASTER level 1A – pixel 15 m) from February 2001 and 2007 was performed applying the satellite digital photogrammetry method (Kääb, 2005). The comparison of the two ge...

Escobar, F. and Aceituno, P.: Influencia del fenómeno ENSO sobre la precipitación Nival en el sector andino de Chile central durante el invierno, Bulletin de l'Institute Français d'Etudes Andines, 27(3), 753–759, 1998.; Espizúa L. E. and Maldonado G. I.: Glacier Variations in the Central Andes (Mendoza province, Argentina) from 1896 to 2005, in: Environmental change and rational water use, edited by: Scarpati, O. E. and Jones, J. A. A., Orientación Gráfica Editora S.R.L,...

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Heat and Energy Fluxes in the Convective Cell Behind a Cold Front ...

By: J. Palamarchuk; S. Ivanov

Description: Department of Meteorology and Forecasting, Environmental University, 65016 Odessa, Ukraine. High resolution model simulations are used to estimate heat fluxes and energy conversion in the convective cell developing behind a cold front. It is found that the model is able to simulate rapid temperature changes in the low troposphere up to 1 °C for a time period of a few minutes due to latent heat release as well as horizontal acceleration up to 5 m/s at th...

Austin, P. M.: Relation between measured radar reflectivity and surface rainfall, Mon. Weather Rev., 115, 1053–1070, 1987.; Bechtold, P., Bazile, E., Guichard, F., Mascard, P., and Richard, E.: A mass flux convection scheme for regional and global models, Q. J. Roy. Meteor. Soc., 127, 869–886, 2001.; Browning, K. A.: Observational synthesis of mesoscale structures within an explosively developing cyclone, Q. J. Roy. Meteor. Soc., 131, 603–623, 2005.; Fuelberg, H. E. and ...

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Hydro- and Morphodynamics in Curved River Reaches – Recent Results...

By: W. Uijttewaal; Q. Chen; K. Blanckaert; G. Constantinescu

Description: State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China. Curved river reaches were investigated as an example of river configurations where three-dimensional processes prevail. Similar processes occur, for example, in confluences and bifurcations, or near hydraulic structures such as bridge piers and abutments. Some important processes were investigated in detail in t...

Blanckaert, K.: Saturation of curvature-induced secondary flow, energy losses, and turbulence in sharp open-channel bends: Laboratory experiments, analysis, and modelling, J. Geophys. Res. Earth Surf., 114, F03015, doi:10.1029/2008JF001137, 2009.; Blanckaert, K.: Topographic steering, flow recirculation, velocity redistribution and bed topography in sharp meander bends, Water Resour. Res., 46, W09506,

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Assessment and Tuning of the Behaviour of a Microphysical Characte...

By: Celano; P. P. Alberoni; V. Levizzani; M. Galletti

Description: A.R.P.A. Emilia Romagna, Servizio Idrometeorologico, Bologna, Italy. The correct classification of prevailing bulk hydrometeor type within a radar resolution volume is a challenge task even if a full set of polarimetric radar observables is available. Indeed scattering and propagation effects from the variety of hydrometeors present interact each others and sometimes, if not often, tend to obscure the characteristic signature of each weather radar targe...

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The Impact of El Niño - Southern Oscillation Events on South Ameri...

By: J. L. Santos

Description: Escuela Superior Politécnica del Litoral. Guayaquil, Ecuador. The presence of ENSO Events in South America is felt in two ways: a) through its effects on both the atmosphere and ocean systems, and b) through its impacts on natural ecosystems (both marine and terrestrial) and on societal and economical sectors (like fisheries, health, and agriculture).

The main effects of El Niño/La Niña are: Increment/Decrem...

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Synoptic Climatological Analysis of Red Sea Trough and Non-red Sea...

By: Y. Tsvieli; A. Zangvil

Description: The Blaustein Institute for Desert Research, Ben Gurion University, Sde Boker Campus, Israel. Winter (October to April) rainfall in Israel is caused mostly by migrating Mediterranean cyclones but certain rain situations are accompanied by a low pressure trough extending northward from the southern Red Sea towards the Eastern Mediterranean (EM) and the Levant. This system, the Red Sea Trough (RST) is one of the most frequent surface atmospheric circulatio...

Air Ministry, Meteorological Office: Weather in the Mediterranean, Vol. I, London, HMSO, 362 pp., 1962.; Alpert, P. and Shay-El, Y.: The moisture source for the winter cyclones in the Eastern Mediterranean, Israel Meteorological Research Papers, 5, 20–27, 1994.; DaSilva, A. and Alpert, P.: Documentation of the multi-year GEOS-1 assimilation data subset for Northern Africa, the Mediterranean and the Middle East. NASA, Goddard Space Flight Center, DAO Office Note 96-05, 24...

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Verification of Precipitation Forecasts by the Dwd Limited Area Mo...

By: A. Orphanou; S. C. Michaelides; P. Constantinides; U. Voigt; J.-p. Schulz; K. Savvidou; M. Savvides

Description: Meteorological Service, Nicosia, Cyprus. A comparison is made between the precipitation forecasts by the non-hydrostatic limited area model LME of the German Weather Service (DWD) and observations from a network of rain gauges in Cyprus. This is a first attempt to carry out a preliminary verification and evaluation of the LME precipitation forecasts over the area of Cyprus.

For the verification, model forecasts and observations were used cov...

Doms, G. and Schättler, U.: A description of the nonhydrostatic regional model LM. Part I: Dynamics and Numerics, Deutscher Wetterdienst, Offenbach, 134 pp., available at: www.cosmo-model.org, 2002.; Meteorological Office: Weather in the Mediterranean, Vol I, 2nd edition, HMSO, London, 1962.; Flocas, H. A., Maheras, P., Karacostas, T. S., Patrikas, I., and Anagnostopoulou, C.: A 40-year Climatological study of relative vorticity distribution over the Mediterranean, Int. ...

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A Theoretical Analysis of River Bars Stability Under Changing Chan...

By: M. Tubino; G. Zolezzi; S. Zen

Description: Department of Civil, Environmental and Mechanical Engineering, via Mesiano 77, 38123, Trento, Italy. In this paper we propose a new theoretical model to investigate the influence of temporal changes in channel width on river bar stability. This is achieved by performing a nonlinear stability analysis, which includes temporal width variations as a small-amplitude perturbation of the basic flow. In order to quantify width variability, channel width is rela...

Ashmore, P.: How do gravel-bed rivers braid? Can. J. Earth Sci., 28, 326–341, 1991.; Ashmore, P.: Laboratory modelling of gravel braided stream morphology. Earth Surf. Process. Land., 7, 201–225, 1982.; Bertoldi, W. and Tubino, M.: Bed and bank evolution of bifurcating channels, Water Resour. Res., 41, W07001, doi:10.1029/2004WR003333, 2005.; Church, M. and Rice, S. P.: Form and growth of bars in a wandering gravel-bed r...

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Wind Variability in a Coastal Area (Alfacs Bay, Ebro River Delta) ...

By: M. Espino; J. Moré; M. Grifoll; M. Bravo; P. Cerralbo; A. Sairouní Afif

Description: Maritime Engineering Laboratory, Polytechnic University of Catalonia (LIM/UPC), c./Escar, 6, 08039 Barcelona, Spain. Wind spatial heterogeneity in a coastal area (Alfacs Bay, northwestern Mediterranean Sea) is described using a set of observations and modelling results. Observations in three meteorological stations (during 2012–2013) along the coastline reveal that wind from the N–NW (strongest winds in the region) appears to be affected by the local oro...

Agterberg, R. and Wieringa, J.: Mesoscale terrain roughness mapping of the Netherlands, Technical Report TR-115, Royal Netherlands Meteorological Institute, Ministerie van Verkeer en Waterstaat, 1989.; Bignami, F., Sciarra, R., Carniel, S., and Santoleri, R.: Variability of Adriatic Sea coastal turbid waters from SeaWiFS imagery, J. Geophys. Res., 112, C03S10, doi:10.1029/2006JC003518, 2007; Bolaños, R., Jorda, G., Cateu...

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Atmospheric Circulation Patterns Associated with Extreme Precipita...

By: A. Bartzokas; C. J. Lolis; E. E. Houssos

Description: Laboratory of Meteorology, Department of Physics, University of Ioannina, 45110 Ioannina, Greece. The main synoptic conditions associated with extreme precipitation amounts in Greece are examined by using a multivariate statistical methodology comprising S-mode Factor Analysis and k-means Cluster Analysis. The following data were used : i) daily precipitation amounts (measured at 06:00 UTC) for the meteorological stations of Hellenikon (Athens), Thessal...

Kunkel, K. E.: North American Trends in Extreme Precipitation, Nat. Hazards, 29, 291–305, 2003.; Bartzokas, A., Lolis, C. J., and Metaxas, D. A.: The 850hPa relative vorticity centres of action for winter precipitation in the Greek area, Int. J. Climatol., 23, 813–828, 2003.; Cislaghi, M., De Michele, C., Ghezzi, A., and Rosso R.: Statistical assessment of trends and oscillations in rainfall dynamics: Analysis of long daily Italian series, Atmos. Res., 77, 188–202, 2005....

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Correlation Between Air-sea Heat Fluxes Over the Aegean Sea and th...

By: S. Ruiz; T. Chronis; G. Ferentinos; A. Bartzokas; N. Zarokanellos; V. P. Papadopoulos

Description: Hellenic Centre for Marine Research, Anavissos, Greece. The relation between the air-sea heat fluxes in the Aegean Sea and the total precipitable water (TPW) over Europe and North Africa is investigated. An one-point linear correlation between the components of surface heat exchange and TPW is employed. During winter and for the shortwave radiation, a dipole of opposite correlation (see-saw teleconnection), is observed between the northeast Europe and t...

Bignami, F., Marullo, S., Santoleri, R., and Schiano M. E.: Longwave radiation budget in the Mediterranean Sea, J. Geophys. Res., 100(C2), 2501–2514, 1995.; Chronis, T., Papadopoulos, V., and Nikolopoulos, E.: QuickSCATob servations of extreme wind events over the Mediterranean and Black Seas during 2000–2008, Int. J. Climatol., doi:10.1002/joc.2213, 2010.; Flocas, H. A., Simmonds, I., Kouroutzoglou, J., Keay, K., Hatzaki, M...

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Urban Warming in Villages : Volume 12, Issue 1 (13/07/2015)

By: J. Esper; C.S.B. Grimmond; J. Lindén

Description: Department of Geography, Johannes-Gutenberg University, Mainz, Germany. Long term meteorological records (> 100 years) from stations associated with villages are generally classified as rural and assumed to have no urban influence. Using networks installed in two European villages, the local and microclimatic variations around two of these rural-village sites are examined. An annual average temperature difference ($\Delta{T}$) of 0.6 and 0.4 K was obser...

Aguilar, E., Auer, I., Brunet, M., Peterson, T. C., and Wieringa, J.: Guidelines on climate metadata and homogenization, WMO/TD No. 1186, WMO, World Climate Data and Monitoring Programme (WCDMP) series, available online: http://www.wmo.int/datastat/documents/WCDMP-53_1.pdf, 2003.; Andersén, M.: Allmän beskrivning av OBS2000-stationerna, Swedish Meteorological and Hydrological Institute (SMHI), Norrköping, S...

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Estimating Local Records for Northern and Central Italy from a Spa...

By: T. Nanni; G. Lentini; M. Maugeri; J. Spinoni; M. Brunetti; C. Simolo

Description: Istituto per le Scienze dell'Atmosfera e del Clima, CNR, via Gobetti 101, 40129 Bologna, Italy. The paper presents monthly 30-arc-second-resolution Northern and Central Italy temperature climatologies and discusses the procedure we adopt to superimpose the information of temperature secular records onto these climatologies. The climatologies are obtained by means of a step-wise linear regression method which aims at determining the temperature dependenc...

Auer, I., Böhm, R., Hiebl, J., Schöner, W., Spinoni, J., Lentini, G., Maugeri, M., Brunetti, M., Nanni, T., Perèec Tadiæ, M., and Bihari, Z.: Final Report of the ECSN Project HRT/GAR - High Resolution Temperature Climatology in Complex Terrain – demonstrated in the test area Greater Alpine Region Gar. Final Report and Annexes 1–4, http://www.zamg.ac.at/forschung/klimatologie/klimamodellierung/ecsn_hrt-gar/, 2008.; Brunetti, M., Maugeri, M., Monti, F., and Nanni T.: Tempe...

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First Outcomes from the Cnr-isac Monthly Forecasting System : Volu...

By: C. Rendina; P. Malguzzi; O. Drofa; A. Buzzi; D. Mastrangelo

Description: Institute of Atmospheric Sciences and Climate, National Research Council, Bologna, Italy. A monthly probabilistic forecasting system is experimentally operated at the ISAC institute of the National Council of Research of Italy. The forecasting system is based on GLOBO, an atmospheric general circulation model developed at the same institute. The model is presently run on a monthly basis to produce an ensemble of 32 forecasts initialized with GFS-NCEP per...

Chen, M., Wang, W., and Kumar, A.: Prediction of monthly-mean temperature: the roles of atmospheric and land initial conditions and sea surface temperature, J. Climate, 23, 717–725, 2010.; Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy...

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Tracer Dispersion in Bedload Transport : Volume 37, Issue 37 (17/1...

By: M. Houssais; G. Seizilles; O. Devauchelle; E. Lajeunesse

Description: Institut de Physique du Globe – Sorbonne Paris Cité, Équipe de Dynamique des fluides géologiques, 1 rue Jussieu, 75238 Paris cedex 05, France. Bedload particles entrained by rivers tends to disperse as they move downstream. In this paper, we use the erosion-deposition model of Charru et al. (2004) to describe the velocity and the spreading of a plume of tracer particles. We restrict our analysis to steady-state transport above a flat bed of uniform sedim...

Ancey, C., Davison, A., Bohm, T., Jodeau, M., and Frey, P.: Entrainment and motion of coarse particles in a shallow water stream down a steep slope, J. Fluid Mech., 595, 83–114, doi:10.1017/S0022112007008774, 2008.; Bagnold, R.: Experiments on a gravity-free dispersion of large solid spheres in a Newtonian fluid under shear, P. Roy. Soc. A-Math. Phy., 49–63, 1954.; Bradley, D. N., Tucker, G. E., and Benson, D. A.: F...

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Two Case Studies of Severe Storms in the Mediterranean Using Amsu ...

By: C. Claud; J.-p. Chaboureau; B. M. Funatsu

Description: Laboratoire de Meteorologie Dynamique/IPSL, Ecole Polytechnique, 91128 Palaiseau CEDEX, France. Mediterranean storms and their associated upper level features are diagnosed here using Advanced Microwave Sounding Unit (AMSU) observations. AMSU-A channel 8 is used to identify upper-level intrusions of stratospheric air, which are often present upstream of heavy precipitating areas, while a combination of AMSU-B channels 3 and 5 is chosen to discriminate m...

Alpert, P., Neeman, B. U., and Shay-El, Y.: Climatological analysis of Mediterranean cyclones using ECMWF data, Tellus, 42A, 65–77, 1990.; Buehler, S. A., Kuvatov, M., and John, V. O.: Scan asymmetries in AMSU-B data, Geophys. Res. Lett., 32, L248110, doi:10.1029/2005GL024747, 2005.; Chaboureau, J.-P. and Claud, C.: Satellite-based climatology of Mediterranean cloud systems and their association with large-scale circulation, J. Geophys. Res., 111, D01102, doi:10.1029/200...

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