The relationship between the occurrence rate of major stratospheric warmings and solar Lyman-alpha flux

Details The relationship between the occurrence rate of major stratospheric warmings and solar Lyman-alpha flux The relationship between the occurrence rate of major stratospheric warmings and solar Lyman-alpha flux

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgrd..11220101s&link_type=abstract

Journal of Geophysical Research, Volume 112, Issue D20, CiteID D20101

Astronomy and Astrophysics

Astrophysics

2

Atmospheric Processes: Middle Atmosphere Dynamics (0341, 0342), Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408), Solar Physics, Astrophysics, And Astronomy: Solar Activity Cycle (2162), Atmospheric Processes: Radiative Processes, Atmospheric Processes: Tides And Planetary Waves

Scientific paper

The statistical connection between major sudden stratospheric warmings (MSSWs) and solar activity was investigated using the Lyman-alpha flux as a proxy. We subdivided the considered time period between winter 1950-51 and winter 2006-07, for which data about MSSWs is available in discrete time intervals of 4 months, and determined the mean Lyman-alpha flux in them. For the statistical analysis, only those months between December and March, when MSSWs exclusively occurred, were used. Then the range of values of the Lyman-alpha flux was subdivided into discrete bins of 0.25 × 1011 photons/cm2 s. Next we determined the frequency at which the mean flux values from the chosen months belonged to the subdivided flux intervals. After that we assigned the number of MSSW occurred under the conditions of a certain Lyman-alpha flux value to the corresponding frequency of the flux values. Finally, we correlated the related MSSW occurrence rate with the discrete Lyman-alpha flux values. The analysis revealed a significant positive correlation between the 11-years solar activity and the occurrence rate of the related MSSWs.

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