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Article
TRIP: a cold telescope for measurements of the Near Infrared Cosmological Background at balloon altitudes
A cooled telescope (250 mm, F/2) has been designed and prepared for measurements of both local and cosmological Near Infrared backgrounds in the waveband 1–5 μm at balloon altitudes (40 km). The separation of ...
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Article
400 Year record of Δ14C in tree rings: The solar-activity cycle before, during and after maunder minimum and the longer cyclesin tree rings: The solar-activity cycle before, during and after maunder minimum and the longer cycles
The analysis of Δ14C in dated tree ring series from 1600 to 1940 AD is presented. The data series is divided into two parts, namely before and after 1780 AD to better study the characteristic of its cyclicities b...
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Article
On the persistence of the 22 y solar cycle
We briefly discuss the existence of precise periodicities of the Hale cycle (∼-22 y), the Gleissberg cycle (∼-88 y), and ∼-132 y cycle, in various direct and indirect indicators (as aurorae, 14C from tree rings a...
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Article
The relationship between climatic variables and wood structure in Pinus halepensis Mill.
The weekly increments under various conditions of a dozen of 30 to 60 years old Halep pines grown in the Lecce area have been measured during two years with a band dendrometer. The data have been compared with...
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Article
The subharmonics of the 22-year solar cycle
We briefly discuss the existence in various aspects of solar activity of the precise periodicities of Hale cycle (22y), Gleissberg cycle (88y) and of 132y recently discovered by our group. We consider also the...
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Chapter
Long and Short Cycles in Solar Activity During the Last Millennia
It is agreed that during the last billion years the Sun, as the analysis of the terrestrial climate has demonstrated, behaved as a stationary system (Mitchell, 1977) and that stars like the Sun evolve on a tim...
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Article
A search of cosmic-ray variations generated by pulsations of the heliosphere
Application of new statistical techniques to time series allow the investigation of cosmic-ray intensity variation in the periodicity range of 1 to 10 years. We can put significant levels to the existence of t...
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Article
The schwabe cycle in the thermoluminescence profile of an Ionian Sea core
The results of the spectral analysis of the time variations of the thermoluminescence (TL) intensity measured at 4 y intervals in a recent Ionian Sea sediment core from 1500 A.D. to 1974 A.D. are presented. Th...
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Article
On the R z -sunspot relative number variations
The Zürich sunspot relative number R z series has been analysed by the cyclogram method. The amplitude and the frequency variations of the Fourier 11 yr component between 1700–1...
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Article
The power spectrum of cosmic rays. The low-frequency range (1·10−11÷1·10−5) Hz
The cosmic-ray power spectral density in the frequency band (5·10−8÷1·10−5) Hz has been estimated from data of mid- and high-latitude neutron monitors and low latitude ion chamber data. The power spectral density...
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Article
Solar cycles in the last centuries in10Be and δ18O in polar ice and in thermoluminescence signals of a sea sediment
The cyclogram method of time series analysis has been used to analyse10Be data (1181–1800 AD) and δ18O data (1181–1960 AD) from an artic ice core and thermoluminescence data (1181–1960 AD) from a Mediterranean se...
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Article
Time series variation analysis with Fourier vector amplitudes
A method is presented here to detect hidden trains of recurrences or periodicities in a time series ofN equispaced data. The complex amplitudes of the harmonic components of period τ of subseries of lengthT are c...
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Article
The 11 y cycle in the thermoluminescence profile of sea sediments
In this paper we present the thermoluminescence profile of a Tyrrhenian sea core during the time interval 1577–1808 A.D. We have sampled the core every 0.5 cm, which is half the spacing used in a previous expe...
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Article
On the solar-particle event of May 7, 1978 recorded at Bologna
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Article
The power spectrum analysis of the cosmic-ray diurnal variation
We present a study of the CR diurnal variation by means of the power spectrum analysis of the neutron monitor flux as observed by a group of nonpolar stations. The power spectrum structure indicates a differen...
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Article
Power spectrum analysis of cosmic-ray fluctuations
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Article
Short-period temperature effect on cosmic rays
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Article
Cosmic-ray microvariations during thunderstorm perturbations
