Summary
Studies were carried out from March 1973 to September 1974 to ascertain the micro-climate of the Amazon Campina ecosystem. This eco-system was in biological equilibrium with its natural vegetation growing on sandy soil. The data gathered included temperature readings of soil taken from three ecologically different sites in the Campina, air temperature readings and relative humidity readings in the Campina and Campinarana. The following mean temperature variations were observed for the soil: exposed soil (sand) 16.7°C, partially exposed soil (sand under lichens) 8.8°C, unexposed soil (under vegetation) 6.1°C. The mean temperature variation of the air in the Campina was 20.3°C, and in the Campinarana 14.0°C. The relative humidity varied between 81-90% in the Campina, and 91-97% in the Campinarana. These micro-climatic variations are a partial result of the vegetation cover which limits the penetration of solar energy in these two related systems within the eco-system.