Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Beyond sunspots: Studies using the McIntosh Archive of global solar
  magnetic field patterns   In 1964 (Solar Cycle 20; SC 20), Patrick McIntosh began creating hand-drawn
synoptic maps of solar magnetic features, based on H$\alpha$ images. These
synoptic maps were unique in that they traced magnetic polarity inversion
lines, and connected widely separated filaments, fibril patterns, and plage
corridors to reveal the large-scale organization of the solar magnetic field.
Coronal hole boundaries were later added to the maps, which were produced, more
or less continuously, into 2009 (i.e., the start of SC 24). The result was a
record of $\sim45$ years ($\sim570$ Carrington rotations), or nearly four
complete solar cycles of synoptic maps. We are currently scanning, digitizing
and archiving these maps, with the final, searchable versions publicly
available at NOAA's National Centers for Environmental Information. In this
paper we present preliminary scientific studies using the archived maps from SC
23. We show the global evolution of closed magnetic structures (e.g., sunspots,
plage, and filaments) in relation to open magnetic structures (e.g., coronal
holes), and examine how both relate to the shifting patterns of large-scale
positive and negative polarity regions.

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The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat