Article de synthèse sur les méthodes d'études des paléoclimats et des oscillations climatiques, les causes possibles des fluctuations climatiques à longterme. (J. Pérard).
On the short-term effects of long-term change in cities: an efficient land markets model
Capitalisme ; Economie de marché ; Equilibre ; Géographie humaine ; Habitat urbain ; Logement ; Marché immobilier ; Modèle ; Propriété ; Rente à court terme ; Rente à longterme ; Revenu immobilier
Présentation d'un modèle permettant de déterminer des fonctions de rente urbaine à court terme lorsque le parc de logements est stable. Il semble que la nature de l'équilibre à longterme de cette rente a un poids déterminant sur la rente à court
terme. Plusieurs modèles, ouverts et fermés sont analysés de même que plusieurs types de contraintes à longterme.
Long-term study of the natural environment. Perceptive science or mindless monitoring?
It is the purpose of this article to consider what constitutes good monitoring and why long-term monitoring is such an important and indispensable task. A description of the Environmental Change Network (ECN) provides a useful foundation
Correlation between long-term pedogenic CaCo3 formation rate and modern precipitation in deserts of the American Southwest
The objectives of this study are (1) to examine the correlation between the longterm rate of pedogenic CaCo3 formation (LTR) and modern mean annual precipitation (MAP) and temperature (MAT) in the desert Southwest, and (2) to consider the utility
Long-term land-use changes in Czechia as a flood risk influencing factor
The aim of the article is to assess the nature of long-term changes in intensity, nature and spatial structure of land-use in Czechia with respect to their significance for the runoff process, and especially during the occurrence and progress
Long-term urban trends in developing countries: some further econometric results in Including papers from the 2 nd Tsukuba conference on regional development and planning.
Explosion urbaine ; Ghum ; Géographie humaine ; Modèle économétrique ; Pays en développement ; Prospective ; Prévision à longterme ; Sous-développement ; Tiers-Monde ; Urbanisation
A policy analysis of Brazil's Agriculture: is the longterm strategy jeopardized at last?
From a development viewpoint this paper seeks to present the main long-term characteristics of the current strategy for agricultural development in Brazil. It provides an evaluation of effects of previous policies and programmes as well as scope
Bursts of aftershocks, long-term precursors of strong earthquakes
Earthquakes that are followed within a short time by abnormally large numbers of aftershocks are hypothesised to be long-term precursors of strongers earthquakes. In a test of the hypothesis, 18 out of 23 strong earthquakes, in five regions
Long-range hospital capital requirements planning: the state of the art, a proposal for change
Algorithme ; Economie de la santé ; Equipement hospitalier ; Géographie humaine ; Investissement ; Modèle régional ; Planification à longterme
Un algorithme pour la planification à longterme des besoins en investissements intégrant tout l'équipement hospitalier d'une région et diminuant les postes dus à l'incertitude provoquée par la concurrence.
Rock glaciers in Svalbard. Tentative dating and inferred long-term velocities
A long-term approach based on detailed mapping and lichenometry provides additional information concerning talus-foot rock glaciers overstepping raised beaches in Svalbard. Their regional distribution is primarily controlled by the tectonic pattern
and especially by the network of major thrusting faults. Tentative dating of the start of the rock glaciers movement combined with data on their longitudinal development allowed to infer average long-term rates of rock glacier movement and to compare them
Estimates of long-term immigration to the United States : moving US statistics toward United Nations concepts
US immigration data are revised to reflect the UN demographic concept of long-term immigration. The estimates of long-term immigration for 1983 are compared to official INS statistics on alien immigration. Significant differences emerge according
Intérêt d'une prévision météorologique à longterme pour le Sahel Ouest africain
Cette étude, déjà parue en anglais dans le Bulletin de la société météorologique américaine, vol. 58, n2, a pour but d'évaluer les implications politiques, économiques et sociales d'une prévision météorologique sûre à longterme pour préserver
l'environnement et rationaliser l'élevage dans le Sahel Ouest africain. Une sérieuse prévision à longterme n'est pas encore possible et dans les structures nationales actuelles, elle ne paraît pas souhaitable.
Les difficultés rencontrées par la prévision à court terme (prévision météorologique) ne doivent pas faire renoncer à une prévision à moyen ou longterme (prévision climatique, notamment à échelle mensuelle ou saisonnière). - (JPB)
The hydrology and long-term geomorphic significance of a flash flood in the Cairngorm mountains, Scotland
This paper assesses the flood's immediate geomorphic impact as well as its longerterm geomorphic significance in terms of slope and valley-floor development. The hydrometeorological characteristics of the flood are reconstructed and placed
in the context of the catchment's flood history. In magnitude frequency terms, the dominant geomorphic processes in this environment are floods which occur several times a century.
Terminology of long-term geomorphology : a Scandinavian perspective
In this paper the terminology used in long-term geomorphology is evaluated. Long-term geomorphology is the study of landforms that are mostly pre-Quaternary, Cenozoic, Mesozoic or even Palaeozoic age. Many terms have been introduced to name the long
-term scale landforms that persist to the present. The definitions of many of these terms are ambiguous, have changed over time, and their use and meaning is consequently often unclear. An attempt is made to clarify definitions. Long-term geomorphology
deals in great parts with the lowering of a land surface to the base level (mostly sea level), leaving a new land surface. The largest group of terms concerns descriptions and genetic models for these kinds of new land surfaces collectively called base
level surfaces here. Other terms dicussed here relate to relict and preglacial landforms and regional terms for stepped surfaces. Terminology is discussed with particular reference to examples from and its use in Scandinavia. Scandinavia is unique