Correlation Between Cosmic-Ray Intensity at Cheltenham and the Air Temperatures and Pressures for 1939

Abstract

A calculation has been made of correlations between the cosmic-ray data from Cheltenham and radiosonde data from the Anacostia Naval Air Station. The variance of the cosmic-ray intensity is found to depend 15 percent on total air pressure, 40 percent on the distribution of the air mass as correlated with the surface temperature, 10 percent on world-wide changes with 30 percent still unaccounted for. Increased air mass in the upper air reduces the surface cosmic-ray intensity more than a corresponding increase in air mass at lower levels. The calculations use 220 days in 1939.