Long-term and transient time variation of cosmic ray fluxes detected in Argentina by CARPET cosmic ray detector

We present results obtained at El Leoncito (CASLEO, San Juan, Argentina) with the CARPET charged particles detector installed in April 2006. The observed modulation of the cosmic ray flux is discussed as a function of its time variability and it is related to longer solar activity variations and to shorter variations during solar and geomagnetic transient activity. Short period (few minutes, few hours) cosmic ray modulation events are observed during rain time (precipitation) and significant variations of the atmospheric electric field. Complementary observations of the atmospheric electric field indicate that its time variations play an important role in the detected cosmic ray event.

Research highlights
► Influences of rain precipitation in the cosmic ray intensity.
► Effects of atmospheric electric field on cosmic ray intensity.
► Solar cycle modulation of cosmic rays.
► Barometric effect in the cosmic ray flux.
► Temperature and seasonal variation of the cosmic ray intensity.