El Nino / Southern Oscillation and beryllium-7 (7Be) Concentration in the Atmospheric Boundary Layer

The influence of El Nino / Southern Oscillation (ENSO) on the atmospheric concentration of beryllium-7 (7Be) in five points situated in South America: Guayaquil, Lima, Anafagasta, Puerto Montt and Punta Arens was investigated. By using correlation analysis it was found that significant statistical relationship between the variability of concentration of 7Be and variability of indices NINO 1+2 and NINO 3 take place in Guayaquil and Puerto Montt. In these cities during the period 1967–1998 yr. there was increased of statistical relationships between the variability of concentration of 7Be and variation of the indices. The results indicate that ENSO most significant effect on the atmospheric concentration of the isotope in the regions located in the subequatorial and subtropical climatic belts. Moreover, such an effect on the time interval 1967–1998 yr., the second half of which corresponds to the period of modern global warming, has increased significantly