This paper will present global maps of all 4 components of the 1948 Thornwaite climateclassification, a long-time wish of J.R. Mather, to whom this paper is dedicated. In addition, a revised Thornwaite-type climateclassification is presented
with the intent of providing a more rational climateclassification for everyday use in a classroom setting. This classification uses an amended version of the Thornthwaite moisture index.
Un complément à la classification globale des climats: la qualité de l'air
Classification des climats ; Climat ; Qualité de l'air
Air quality ; Climate ; Climateclassification
Les classifications habituelles des climats négligent le problème de la qualité de l'air. C'est pourquoi l'A. propose de prendre en considération la qualité de l'air à l'intérieur de la classification globale des climats. - (D. Rouvière).
Comparaison de trois procédés de classification statistique, signalant les principales difficultés qui peuvent surgir dans l'application des techniques multivariées à la classification et à la régionalisation des climats. Exemple du Nigeria. (JPB).
The history, status and future of climaticclassification
Atmospheric dynamics ; Classification ; Climatic region ; Climatology ; History of sciences ; Taxonomy ; Weather type
Classification ; Climatologie ; Dynamique de l'atmosphère ; Histoire des sciences ; Région climatique ; Taxonomie ; Type de temps
The objective of this paper is to characterize the dominant themes that have been presented in that extensive literature in order to provide a perspective on climaticclassification of the past and the present. Such an analysis permits speculations
on the future use and goals of the classification process in climatology.
Classics in physical geography revisited. Thornthwaite, C.W. 1948: an approach toward a rational classification of climate. The Geographical Review 38, 55-94
Thornthwaite's 1948 climaticclassification system was fundamentally different from all its predecessors: climates are defined rationally and boundaries are determined objectively by the meteorological data; vegetation, soils, hydrology, etc
., are then to be determined from the prevailing climatic type.
Classification ; Climat ; Climat maritime ; Climat océanique ; France ; France de l'Ouest
Classification ; Climate ; France ; Oceanic climate ; Western France
Tentative d'affinement de la définition et de l'emboîtement des climats océanisés, marimites et littoraux, à travers l'exemple de la France de l'Ouest. - (JPB)
The climates of Ghana according to the Thornthwaite 1948 ClimaticClassification
Bilan climatique ; Classification ; Climat ; Climatologie ; Evapotranspiration potentielle ; Ghana ; Géographie de l'Afrique ; Humidité ; Précipitation ; Zone intertropicale
Essai d'approche réaliste d'une classification des climats du Ghana à partir de l'utilisation des données d'évapotranspiration potentielle obtenues par la formule modifiée de Penman et d'une version modifiée de la technique de Thornthwaite de 1948
monthly values of main fluxes of energy and moisture. Various empirical formulae were used for this purpose. The ratio P/Ep (atmospheric precipitation / potential evaporation) is the main criterion in our classification, altogether nine types of climate
The objective of this study is to establish the climatological classification of Vietnam, based on the structure of heat and water balances. Data from 85 meteorological stations, for the period 1960-1975 were taken into account for determining mean
have been distinguished over Vietnam's territory. The conclusion suggests that the climate of certain regions of Vietnam seems to be more arid than it has been hitherto supposed. - (DG)
The paper presents the method of topoclimatic mapping which bases on the analyse of the heat balance of an active surface. The classification considers the structure of the radiation balance as well as the quantity of another components of the heat
Arid area ; Climate ; Climateclassification ; Cluster analysis ; Factor analysis ; Multivariate analysis ; Saudi Arabia
This study is aimed to be a contribution to climatic regionalization of Saudi Arabia. The data used here have been obtained from 56 meteorological stations. The results obtained by a multivariate factor-cluster analysis are compared with those
of some traditional methods. They produce richer regions and show clear climate variations within this vast country.
Assessing climate change in the contiguous United States using a modified Thornthwaite climateclassification scheme
Analyse multivariée ; Années 1895-2005 ; Changement climatique ; Classification des climats ; Climat ; Etats-Unis ; Humidité ; Température
Climate ; Climateclassification ; Climatic change ; Moisture ; Multivariate analysis ; Temperature ; United States of America
This new approach allows both moisture and thermal conditions to be examined simultaneously for a better assessment of multivariate climate change. Changes in area of different climate types over time is determined using the climate year approach
and the spatial nature of climate change is examined by computing climate types based on averages from three thirty-year periods over the twentieth century. Over the study period from 1895 to 2005, statistically significant changes in areal coverage of different
climate types have occurred : changes to moister climate categories and positive temperature trends.
Présentation d'un logiciel permettant de classer automatiquement les climats en zones et types, selon les critères de Koeppen, à partir d'une base de données limitée aux moyennes mensuelles des températures et des précipitations. Application au
Brésil. Les résultats sont dans l'ensemble satisfaisants, mais ne permettent pas de descendre aux niveaux les plus fins de la classification. - (JPB)
On the classification of tropical climates for the study of regional climatology : Nigeria as a case study
Les variations climatiques régionales peuvent être classifiées selon trois facteurs : le temps de stationnement des masses d'air, le régime des vents et les caractéristiques des précipitations.
Proposition et vérification d'une classification génétique des climats chiliens
Analyse d'agrégation ; Analyse en composantes principales ; Analyse multivariée ; Chili ; Climat ; Géographie physique ; Régionalisation ; Régionalisation physique ; Taxonomie
This genetic classification of climates in Chile is based on a spatial cross-interaction of primary and secondary climatic influences, e. g. those of cosmic order (latitude), those emanating from atmospheric and oceanic processes in the Southeast
Pacific zone, and major topographic features of the country. Seven major categories of climatic types and subtypes have been defined and tested with multivariate quantitative techniques such as principal components and cluster analysis. This original
classification has been verified through analysis of records from 33 stations throughout Chile.