Comparison of UV Irradiance Variations during Solar Cycles 21 and 22

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

The main goal of this paper is to study the UV irradiance variations in the Mg II h & k core-to-wing ratio derived from the SUSIM irradiance observations on board the Upper Atmosphere Research Satellite and the SBUV instruments on the Nimbus-7 and NOAA satellites. The SUSIM instrument has been monitoring solar UV irradiance since October 12, 1991. The combined Nimbus-7/SBUV1 and NOAA9/SBUV2 data cover the time interval of November 1978 to present and provide information about the UV irradiance variations for almost two solar cycles. The observed UV irradiance changes are compared to the Magnetic Plage Strength Index (MPSI) and Mt. Wilson Sunspot Index (MWSI) derived from the ground-based observations at the Mt. Wilson Observatory at 525 nm. Previous results show that the linear relationship between UV irradiance and proxy data representing the changing emission of plages and the magnetic network breaks down at the minimum of solar cycle 21. In this paper we examine the variations observed in UV irradiance during the various phases of solar cycles 21 and 22, with emphasis on studying the UV irradiance variability during the two solar minima.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Comparison of UV Irradiance Variations during Solar Cycles 21 and 22 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Comparison of UV Irradiance Variations during Solar Cycles 21 and 22, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparison of UV Irradiance Variations during Solar Cycles 21 and 22 will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1146469

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.