Types de circulation atmosphériques, advection des masses d'air et variations climatiques: Le cas des hivers doux et des hivers rudes récents en Belgique

in Publications de l'Association Internationale de Climatologie (1993), 6

In Belgium, air masse advections -as it appears at 850 hPa level- are very important for the explanation of the surface air temperature of mild winters. Nevertheless in case of severe winters, radiative ... [more ▼]

In Belgium, air masse advections -as it appears at 850 hPa level- are very important for the explanation of the surface air temperature of mild winters. Nevertheless in case of severe winters, radiative conditions observed at tropospheric lower level and horizontal motion of very thin air masses (below 850 hPa level) seem to be more important for the explanation of ground level temperature. [less ▲]

The durability and development of optimum seaming parameters for a FCEA geomembrane

in Geosynthetics 93 Conference (1993)

a new way to solve galloping on bundled lines. A concept, a prototype bytwo years field experience.

in Bulletin Scientifique de l'Association des Ingénieurs Electriciens sortis de l'Institut Electrotechnique Montefiore (1993), 2

that paper introduce a new concept to control galloping on bundle conductors using a dynamic device coupling detuning of frequencies together with some addition in torsional damping.The concept is ... [more ▼]

that paper introduce a new concept to control galloping on bundle conductors using a dynamic device coupling detuning of frequencies together with some addition in torsional damping.The concept is explained, a prototype is tested on actual line and results are presented. [less ▲]

Palynological age for the lower part of the Hangenberg Shales in Sauerland, Germany

in Annales de la Société Géologique de Belgique (1993), 116(Z), 243-247

La simulation du transport des nitrates dans un aquifère crayeux du Crétacé en Belgique: approche expérimentale et numérique

in Hydrogéologie (1993), (2), 163-170

Applying the Lagamine model to compute land subsidence in Shanghai

in Bulletin of Engineering Geology & the Environment (1993), 47

L’enquête nationale sur les effectifs du cheptel au Burkina Faso

in Stateco (1993), 73

Can micro-lensing effects help to distinguish between the models for the BAL region of QSOs?

in Surdej, Jean; Fraipont-Caro, D.; Gosset, Eric (Eds.) et al Liege International Astrophysical Colloquia, Gravitational Lenses in the Universe (1993)

Not Available

Computing accurately the induced land subsidence affecting the main sinking cities located at major river mouths

in Advances in Hydro-Science and Engineering - Volume 1 -ICHE Washington (1993)

A method of comparison of two close batches data: Application to analysis of fog formation causes

in Geophysical Research Letters (1993), 20(12), 1179-1182

Given suitable conditions of air temperature and humidity, the density of a fog and its microphysical properties depend mainly on the availability of cloud condensation nuclei (CCN) and their nature. Fogs ... [more ▼]

Given suitable conditions of air temperature and humidity, the density of a fog and its microphysical properties depend mainly on the availability of cloud condensation nuclei (CCN) and their nature. Fogs become particularly dense near certain industrial plants because of high concentration of hygroscopic combustion particles in the air. Their role in dense fog formation is estimated by comparing the local climates and CCN concentrations at two similar sites, the first being more subject to air pollution and dense fogs than the second. Orthogonal regression is applied to three meteorological variables (air temperature, relative humidity, wind speed) and CCN concentration. As we compare very close variables, bootstrap provides precise confidence intervals independent of Gaussian assumptions. Two sites are compared: they are located in the Meuse valley (Belgium) at a distance of about 15 km. We found that the local climate of the polluted site is not only colder and wetter but also richer in CCN that the control site. These results suggest interactions of natural and anthropogenic causes in dense fog formation at industrial site. This method is useful in various domains of geophysics when correlated time series have to be compared. [less ▲]