Article

Il Nuovo Cimento C

, Volume 18, Issue 3, pp 335-341

First online:

Rainfalls during great Forbush decreases

  • Yu. I. StozhkovAffiliated withP. N. Lebedev Physical Institute, Russian Academy of SciencesUniversity of Campinas, IFGW-DRCC, CEPAGRI
  • , J. Zullojr.Affiliated withUniversity of Campinas, IFGW-DRCC, CEPAGRI
  • , I. M. MartinAffiliated withUniversity of Campinas, IFGW-DRCC, CEPAGRI
  • , G. Q. PellegrinoAffiliated withUniversity of Campinas, IFGW-DRCC, CEPAGRI
  • , H. S. PintoAffiliated withUniversity of Campinas, IFGW-DRCC, CEPAGRI
  • , G. A. BazilevskayaAffiliated withP. N. Lebedev Physical Institute, Russian Academy of Sciences
  • , P. C. BezerraAffiliated withUniversity of Campinas, IFGW-DRCC, CEPAGRI
  • , V. S. MakhmutovAffiliated withP. N. Lebedev Physical Institute, Russian Academy of Sciences
  • , N. S. SvirzevskyAffiliated withP. N. Lebedev Physical Institute, Russian Academy of Sciences
    • , A. Turtellijr.Affiliated withUniversity of Campinas, IFGW-DRCC, CEPAGRI

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Summary

The changes of rainfall values during great Forbush decreases recorded by the low-latitudinal neutron monitor of Huancayo (47 events from 1956 through 1992) were examined. The data on precipitations were taken from the State of São Paulo and from the Amazonian region, Brazil. As a rule, the data from more than 50 meteorological stations were used for each events. The main result is the following: during strong decreases of cosmic-ray flux in the atmosphere (great Forbush decreases) the precipitation value is decreased. The effect of rainfall changes is seen more distinctly if wet seasons are considered.

PACS 92.60.Jq

Water in the atmosphere humidity clouds evaporation precipitation

PACS 96.40

Cosmic rays