California ; Contre-urbanisation ; Croissance démographique ; Etats-Unis ; Migration ; Sierra Nevada
California ; Counterurbanization ; Migration ; Population growth ; Sierra Nevada ; United States of America
Considérations théoriques. La Sierra Nevada U.S. Croissance de la population dans la High Sierra. Impacts de l'émigration d'aménité sur les conditions socio-économiques.
A physiographic streamflow model for small Sierra Nevada basins
California ; Cours d'eau ; Débit ; Etats-Unis ; Hydrodynamique ; Modèle ; Prévision ; Sierra Nevada
California ; Discharge ; Forecast ; Hydrodynamics ; Model ; Sierra Nevada ; Stream ; United States of America
AA. propose a mathematical equation to measure mean annual stream discharge from small basins within the granitic terrain of the Sierra Navada. - (DWG)
Dependancy and underdevelopment in north-western Sierra Leone, 1896-1939
(1896-1939) ; Développement régional ; Economie ; Géographie de l'Afrique ; Sierra Leone ; Sierra Leone, Nord-Ouest
A study of the economic history of north-western Sierra Leone throws light on its present development. As an internal colony of the Freetown imperial centre, it was not uniformly underdeveloped and dependent. (EMS).
Commerce ; Communauté libanaise ; Géographie de l'Afrique ; Prospective ; Sierra Leone
After 80years in Sierra Leone during which they have prospered as traders, it seems that their future is uncertain and they are no longer needed. (EMS).
Solar influences on Holocene treeline altitude variability in the Sierra Nevada
Altitude ; California ; Ecosystème ; Ecotone ; Etats-Unis ; Holocène ; Limite supérieure de la forêt ; Radiation ; Sierra Nevada ; Variation climatique
Altitude ; California ; Climatic variation ; Ecosystem ; Ecotone ; Holocene ; Radiation ; Sierra Nevada ; Tree line ; United States of America
Analysis of treeline annual growth at a site in the southern Sierra Nevada, California, indicates that much of the past climate variability on timescales of centuries to millenia during the Holocene may be attributed to periodic changes in solar
irradiance. Analysis of treeline-altitude variation in the Sierra Nevada and White Mountains of California suggests that this periodic change is superimposed on a generally decreasing temperature trend over the past 5000 years. This has led to a general