RT info:eu-repo/semantics/article
T1 Indications for solar influence on radon signal in the subsurface of Tenerife (Canary Islands, Spain)
A1 Steinitz, G
A1 Martín Luis, María Candelaria
A1 Piatibratova, O.
A2 Grupo de Investigación (ULL): Vulcanología Aplicada
K1 Solar influence
K1 Radon signal
K1 Tenerife (Canary Islands, Spain)
K1 Subsurface
AB Radon at two locations in Tenerife is investigated. The MM-0 site is located in a bunker near Teide volcano. Daily radon (DR) signals are dominated by a 12-hour (S2) periodicity. Continuous wavelet transform (CWT) analysis of day-time and night-time series results in a day-night differentiation, which does not occur in the coeval temperature and pressure. This indicates that the radon system is directly affected by rotation of Earth around its axis, and not via the pressure and/or temperature pattern. San Fernando sites are in an underground gallery, located at 2.1 and 3 km from the entrance. Alpha and gamma time series show DR signals having an S1 and a strong S2 periodicity. Sidebands occur around the S1 periodicity. The lower sideband is close to 0.9972696 cycles per day (CPD; = sidereal frequency) and the upper sideband at a symmetric frequency above. They reflect a driver containing two waveforms having periodicities of rotation of Earth around its axis and around the Sun that influences radon in a non-linear fashion, leading to the sidebands around the S1 periodicity. Observation in Tenerife of sidebands and day-night phenomena substantiates the notion that the periodic components in the diurnal and annual frequency band of radon time series are due to the influence of a component in solar radiation
SN 1951-6355
YR 2015
FD 2015
LK http://riull.ull.es/xmlui/handle/915/35739
UL http://riull.ull.es/xmlui/handle/915/35739
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 25-nov-2024