File:Sunspots-reconstructed-0-2015-labels-en.svg

Summary[edit]

Literature and Sources:

• G. Usoskin et al.: Evidence for distinct modes of solar activity. In: Astronomy & Astrophysics, 2014. DOI:10.1051/0004-6361/201423391
• Frédéric Clette et al.: Revisiting the Sunspot Number: A 400-year perspective on the solar cycle. In: Space Sciences Series of ISSI - The Solar Activity Cycle. 2015. DOI:10.1007/978-1-4939-2584-1_3 (For details on the new group v2 number)
• NOAA Space Weather Prediction Center: Predicted Sunspot Number and Radioflux. May 9th, 2016. Accessed June 3rd, 2016.
• WDC-SILSO, Royal Observatory of Belgium, Brussels: group number | In: SILSO: Sunspot Index and Long-term Solar Observations. (Version 2.0 (Alternate series), Svalgaard & Schatten 2015: "backbone" yearly mean group number). Accessed June 3rd, 2016.

Created with Gnuplot 4.4 using the following script:

set terminal svg enhanced size 1000 500 fname "Nimbus Sans L" fsize 10
set output "sunspots-reconstructed-0-2015.svg"
set title "Group sunspot number 1615 - 2015, decadal average"
set datafile missing '"#N/A"'
set key top left
set key nobox
set yrange [0:100]
set ytics ("10" 10, "" 20, "30" 30, "" 40, "50" 50, "" 60, "70" 70, "" 80, "90" 90)
set xrange [0:2015]
set xtics 0,200,2000
set mxtics 4
set xlabel 'Year'
set ylabel 'Sunspots'
set style data lines
plot 'sn.dat' using 1:3:4 w filledcurves lt rgbcolor "#F6DFB6" notitle, \
     'sn.dat' using 1:2 lt rgbcolor "red" lw 3 title "^{14}C reconstruction (Usoskin et al., 2014)", \
     'groupnumber-1615-2015-dec-avg.csv' using 1:5 lt rgbcolor "blue" lw 3 title "Group sunspot no. (V2.0, -2015 SILSO data, 2016-2020 NOAA SWPC)"

The file groupnumber-1615-2015-dec-avg.csv has been derived from GNbb2_y.txt by adding the predicted values for 2016-2020 and then computing the decadal averages.

Licensing[edit]

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