The lack of a consistent, century-long time series

The gap

Evidence profile

Stated in the cells research gap and cells future research and cells limitations and abstract sections of the source papers, classified as general, drawn from work published between 2016 and 2026, spanning 4 journals. Those papers have been cited 57 times in total.

Supporting evidence — 6 representative gaps

• Phase relationships among different types of solar magnetic fields at high and low latitudes (2026) · Frontiers in Astronomy and Space Sciences · doi

  The study identifies a gap in the understanding of the phase relationships among different types of solar magnetic fields. - Prior research has not fully addressed the question of how magnetic fields at high and low latitudes interact.

  generalstated in cells research gapevidence 5/5
  Keywords: study identifies gap understanding phase relationships among different
• Quantifying the Effect of Passband on Observations in the Ca <scp>ii</scp> K Line (2026) · The Astrophysical Journal Letters · doi

  The lack of a consistent, century-long time series of solar activity from historical and modern Ca ii K observations. - The need for a means to homogenize data from diverse historical and modern archives.

  generalstated in cells research gapevidence 5/5
  Keywords: lack consistent century-long time series solar activity historical
• Re-evaluating solar irradiance reconstructions: No evidence of large secular trends (2026) · Astronomy &amp; Astrophysics · doi

  There is a gap in understanding the long-term variations in total solar irradiance. - The current irradiance reconstructions are uncertain and may not accurately represent the secular trends in TSI. - There is a need for more accurate and robust reconstructions of total solar irradiance.

  generalstated in cells research gapevidence 5/5
  Keywords: there gap understanding long-term variations total solar irradiance
• Re-evaluating solar irradiance reconstructions: No evidence of large secular trends (2026) · Astronomy &amp; Astrophysics · doi

  Future research should focus on improving proxy records, such as cosmogenic isotopes, sunspots, and Ca ii K. - Future research should aim to develop more accurate and robust reconstructions of total solar irradiance. - Future research should investigate the variability associated with small-scale magnetic fields on timescales longer than those covered by current observations.

  generalstated in cells future researchevidence 5/5
  Keywords: future research focus improving proxy records cosmogenic isotopes
• Re-evaluating solar irradiance reconstructions: No evidence of large secular trends (2026) · Astronomy &amp; Astrophysics · doi

  Cross-calibrating modulation potential reconstructions from cosmogenic isotopes against neutron monitor data remains highly uncertain. - The study cannot completely rule out variability associated with small-scale magnetic fields on timescales longer than those covered by current observations.

  generalstated in cells limitationsevidence 5/5
  Keywords: cross-calibrating modulation potential reconstructions cosmogenic isotopes against neutron
• Scientific objectives and capabilities of the Coronal Solar Magnetism Observatory (2016) · Journal of Geophysical Research Space Physics · cited 57× · doi

  Abstract Magnetic influences increase in importance in the solar atmosphere from the photosphere out into the corona, yet our ability to routinely measure magnetic fields in the outer solar atmosphere is lacking.

  generalstated in abstractevidence 4/5
  Keywords: magnetic solar atmosphere abstract influences increase importance photosphere corona ability routinely measure fields outer lacking

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