Showing results 81 to 100 of 125
 Les tempêtes (tempêtes extratropicales, cyclones tropicaux et tornades)Erpicum, Michel  ; in Le point sur le I de Géographie (Soc géogr de Liège) (1996), 4 Detailed reference viewed: 12 (3 ULg) Méthodologie pour une meilleure représentation spatio-temporelle des fluctuations pluviométriques observées au Niger depuis 1905Ozer, Pierre ; Erpicum, Michel in Sécheresse (1995), 6(1), 103-108 The fluctuations of annual precipitation observed in Niamey and Zinder (Niger) since the turn of the century warranted a comparison of rainfall maps and rainy-season characteristics between 1950-1967 ... [more ▼] The fluctuations of annual precipitation observed in Niamey and Zinder (Niger) since the turn of the century warranted a comparison of rainfall maps and rainy-season characteristics between 1950-1967 (period of high rainfall) and 1968-1985 (period of low rainfall). Calculating two specific annual spatiotemporal rainfall profiles provided precisions as to the irregular and heterogeneous advance of the drought through Niger. [less ▲] Detailed reference viewed: 58 (8 ULg)Suivi de la saison des pluies 1991-1992 en Afrique équatoriale à l'aide des indicateurs Météosat "occurrences des nuages à sommet froid et températures de brillance maximum de surface; ; Erpicum, Michel in Publications de l'Association Internationale de Climatologie (1995), 8 Detailed reference viewed: 9 (4 ULg)Les fondements de l'analyse numérique de photos prises au fisheye pour des besoins topoclimatologiquesCornélis, Bernard ; Erpicum, Michel in Publications de l'Association Internationale de Climatologie (1995), 8 Fisheye pictures are frequently used in forestry and in ecology for canopy measurements. In climatology, it seems that they have only been used for illustration purposes. In fact, fisheye pictures are ... [more ▼] Fisheye pictures are frequently used in forestry and in ecology for canopy measurements. In climatology, it seems that they have only been used for illustration purposes. In fact, fisheye pictures are rich in climatological information. Digital fisheye image processing can be used for applied climatology as well as for topoclimatological studies. It allows the quantification of insolation, diffuse radiation, sky-view factor,.… In other words, it provides an objective assessment of the exposure of a site or of a measuring device. This article introduces the basis for digital fisheye image processing. The possibilities offered by this tool will be illustrated with sunshine measurements in an urban environment. [less ▲] Detailed reference viewed: 84 (24 ULg)Le climat de la région Wallonne : les normales climatologiques et leurs variabilités spatiotemporelles; ; et al in Petitjean, M.; Dachelet, A.; Hallet, C. (Eds.) Etat de l'Environnement Wallon - 1994 (Vol 1) (1995) Detailed reference viewed: 19 (7 ULg)Les échelles spatiales du climat; Erpicum, Michel in Dachelet, A.; Hallet, C.; Petitjean, M. (Eds.) Etat de l'Environnement Wallon - 1994 (Vol 1) (1995) Detailed reference viewed: 26 (7 ULg)Mise au point d’une classification automatique des cartes synoptiques d’altitude et application à l’étude des incendies de forêts; ; et al in Publication Association Internationale de Climatologie (1995), 8 Detailed reference viewed: 27 (15 ULg)Thermographie routière nocturne de la Région Wallonne : méthodologie, présentation des résultats et intérêts de l'approche topoclimatologique; Erpicum, Michel ; Frédéric, Marc et alin Publications de l'Association Internationale de Climatologie (1995), 8 Detailed reference viewed: 27 (13 ULg)Anomalie pluviométrique négative sur le Sud-est du Zaïre en janvier 1992; Erpicum, Michel ; in Publications de l'Association Internationale de Climatologie (1994), 7 Detailed reference viewed: 15 (4 ULg)Climatological Secondary Meteosat Image : Analysis proposed to earth observation scientistsErpicum, Michel in Earth observation (1994), 3 Detailed reference viewed: 4 (1 ULg)Types de circulation atmosphériques, advection des masses d'air et variations climatiques: Le cas des hivers doux et des hivers rudes récents en BelgiqueErpicum, Michel ; Mabille, Georges ; Alexandre, Jean 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 ▲] Detailed reference viewed: 40 (6 ULg)Suivi satellitaire (Météosat 5) de la situation météorologique des 21, 22, 23 septembre 1992 sur l'Europe occidentale et le Proche AtlantiqueErpicum, Michel in Revue de Géographie de Lyon (1993), 68 Detailed reference viewed: 7 (2 ULg)Advection des masses d'air et température de l'air près du sol : recherche d'une méthode d'analyseErpicum, Michel ; Mabille, Georges ; Alexandre, Jean in Publications de l'Association Internationale de Climatologie (1992), 5 Detailed reference viewed: 20 (3 ULg)Afrique centrale, géomorphologie et géologie récente (hommage au Professeur Alexandre)Erpicum, Michel ; Petit, François ; et alBook published by Société Géographique de Liège (1992) Detailed reference viewed: 13 (5 ULg)Le climatAlexandre, Jean ; Erpicum, Michel ; in Denis, J. (Ed.) Géographie de la Belgique (1992) Detailed reference viewed: 22 (6 ULg)Variabilité spatiale et temporelle de l'enneigement du sol en BelgiqueErpicum, Michel ; Mabille, Georges ; in Publications de l'Association Internationale de Climatologie (1991), 4(1991), 267-273 Detailed reference viewed: 21 (4 ULg) Comparaison des températures mesurées en Belgique dans un site urbain (Uccle) et un site rural (Thimister) : Impact d'un changement de site sur une série de données thermométriques (Thimister); Mabille, Georges ; Erpicum, Michel in Publications de l'Association Internationale de Climatologie (1991), 4 A comparative study of long temperature series in an urban station and in a rural station situated in Belgium determine if warming detected in the urban station or temporay change in the rural station can ... [more ▼] A comparative study of long temperature series in an urban station and in a rural station situated in Belgium determine if warming detected in the urban station or temporay change in the rural station can be generalized or not into the country. [less ▲] Detailed reference viewed: 64 (15 ULg)La topoclimatologie, un outil au service de l'agronomie. Exemples pris en BelgiqueErpicum, Michel in Bulletin des Recherches Agronomiques de Gembloux (1991), 26(1) Detailed reference viewed: 23 (12 ULg)Afrique centrale : géomorphologie et géologie récentePetit, François ; Erpicum, Michel ; et alBook (1991) Detailed reference viewed: 6 (1 ULg)Surveillance des variations de la nappe d'eau superficielle en Fagnes de Duret et du SetayErpicum, Michel ; Streel, Maurice ; et alin Hautes Fagnes (1991), 203 Detailed reference viewed: 5 (0 ULg) |
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