Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
DO FLARES COUNT FOR THE VARIATION OF TOTAL SOLAR IRRADIANCE? Adrian Oncica, Miruna Daniela Popescu, Marilena Mierla, Georgeta Mari
 

Summary: DO FLARES COUNT FOR THE VARIATION OF TOTAL SOLAR IRRADIANCE?
Adrian Oncica, Miruna Daniela Popescu, Marilena Mierla, Georgeta Mari
Astronomical Institute of the Romanian Academy
St. Cuitul de Argint 5, RO-75212 Bucharest 28, Romania
Fax: +40 1 337 33 89; tel.: +40 1 335 80 10
E-mail: adrian@aira.astro.ro
ABSTRACT
Observations made with radiometers on board of space
missions offer us the total solar irradiance (TSI) data since
1978 (from ERB/Nimbus to VIRGO/SOHO). This 25-year
interval made possible the reveal of the 11-year cycle
variability in the data series, with a difference in amplitude of
about 0.15% from minimum to maximum. A major part of this
variation is explained as a combined effect of the sunspots
blocking and the intensification due to bright faculae and
plages, with a slight dominance of the bright features effect.
The empirical models based only on contrast photospheric or
chromospheric measurements can explain maximum 90% of
the TSI variation. We evaluate the possible effect of solar
flares on TSI variation taking into consideration the H line

  

Source: Armagh Observatory

 

Collections: Physics