Open Access
Research Article
Issue |
J. Space Weather Space Clim.
Volume 7, 2017
|
|
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Article Number | A12 | |
Number of page(s) | 11 | |
DOI | https://doi.org/10.1051/swsc/2017010 | |
Published online | 05 May 2017 |
- Arlt, R. Digitization of sunspot drawings by Staudacher in 1749–1796. Sol. Phys., 247, 399–410, 2008, DOI: 10.1007/s11207-007-9113-4. [NASA ADS] [CrossRef] [Google Scholar]
- Arlt, R. The solar observations at Armagh Observatory in 1795–1797. Astron. Nachr., 330, 311–316, 2009, DOI: 10.1002/asna.200911195. [NASA ADS] [CrossRef] [Google Scholar]
- Arlt, R. The sunspot observations by Samuel Heinrich Schwabe. Astron. Nachr., 332, 805–814, 2011, DOI: 10.1002/asna.201111601. [NASA ADS] [CrossRef] [Google Scholar]
- Beer, J., K.G. McCracken, and R. von Steiger. Cosmogenic radionuclides: theory and applications in the terrestrial and space environments, Springer, Berlin, ISBN: 978-3-642-14650-3, 2012. [Google Scholar]
- Carrasco, V.M.S., J.M. Vaquero, M.C. Gallego, and R.M. Trigo. Forty two years counting spots: solar observations by D.E. Hadden during 1890–1931 revisited. New Astron., 25, 95–102, 2013, DOI: 10.1016/j.newast.2013.05.002. [NASA ADS] [CrossRef] [Google Scholar]
- Chatzistergos, T., I.G. Usoskin, G.A. Kovaltsov, N.A. Krivova, and S.K. Solanki. New reconstruction of the sunspot group number since 1739 using the direct calibration and “backbone” methods. A&A, 2017, in press. [Google Scholar]
- Clette, F., and L. Lefèvre. The new sunspot number: assembling all corrections. Sol. Phys., 291, 2629–2651, 2016, DOI: 10.1007/s11207-016-1014-y. [NASA ADS] [CrossRef] [Google Scholar]
- Clette, F., L. Svalgaard, J.M. Vaquero, and E.W. Cliver. Revisiting the sunspot number. A 400-year perspective on the solar cycle. Space Sci. Rev., 186, 35–103, 2014, DOI: 10.1007/s11214-014-0074-2. [NASA ADS] [CrossRef] [Google Scholar]
- Clette, F., E.W. Cliver, L. Lefèvre, L. Svalgaard, and J.M. Vaquero. Revision of the sunspot number(s). Space Weather, 13, 529–530, 2015, DOI: 10.1002/2015SW001264. [NASA ADS] [CrossRef] [Google Scholar]
- Clette, F., L. Lefèvre, M. Cagnotti, S. Cortesi, and A. Bulling. The revised Brussels-Locarno sunspot number (1981–2015). Sol. Phys., 291, 2733–2761, 2016, DOI: 10.1007/s11207-016-0875-4. [NASA ADS] [CrossRef] [Google Scholar]
- Cliver, E.W. Comparison of new and old sunspot number time series. Sol. Phys., 291, 2891–2916, 2016, DOI: 10.1007/s11207-016-0929-7. [CrossRef] [Google Scholar]
- Cliver, E.W., and A.G. Ling. The discontinuity circa 1885 in the group sunspot number. Sol. Phys., 291, 2763–2784, 2016, DOI: 10.1007/s11207-015-0841-6. [NASA ADS] [CrossRef] [Google Scholar]
- Cliver, E.W., F. Clette, and L. Svalgaard. Recalibrating the Sunspot Number (SSN): the SSN workshops. Cent. Eur. Astrophys. Bull., 37 (2), 401–416, 2013. [Google Scholar]
- Cliver, E.W., F. Clette, L. Svalgaard, and J.M. Vaquero. Recalibrating the Sunspot Number (SN): the 3rd and 4th SN workshops. Cent. Eur. Astrophys. Bull., 39, 1–19, 2015. [Google Scholar]
- Diercke, A., R. Arlt, and C. Denker. Digitization of sunspot drawings by Spörer made in 1861–1894. Astron. Nachr., 336, 53–62, 2015, DOI: 10.1002/asna.201412138. [NASA ADS] [CrossRef] [Google Scholar]
- Erwin, E.H., H.E. Coffey, W.F. Denig, D.M. Willis, R. Henwood, and M.N. Wild. The Greenwich photo-heliographic results (1874–1976): initial corrections to the printed publications. Sol. Phys., 288, 157–170, 2013, DOI: 10.1007/s11207- 013-0310-z. [NASA ADS] [CrossRef] [Google Scholar]
- Hoyt, D.V., and K.H. Schatten. Group sunspot numbers: a new solar activity reconstruction. Sol. Phys., 179, 189–219, 1998a, DOI: 10.1023/A:1005007527816. [NASA ADS] [CrossRef] [Google Scholar]
- Hoyt, D.V., and K.H. Schatten. Group sunspot numbers: a new solar activity reconstruction. Sol. Phys., 181, 491–512, 1998b, DOI: 10.1023/A:1005056326158. [NASA ADS] [CrossRef] [Google Scholar]
- Hoyt, D.V., K.H. Schatten, and E. Nesmes-Ribes. The one hundredth year of Rudolf Wolf’s death: do we have the correct reconstruction of solar activity? Geophys. Res. Lett., 21, 2067–2070, 1994, DOI: 10.1029/94GL01698. [NASA ADS] [CrossRef] [Google Scholar]
- Kopecký, M., G.V. Kuklin, and B. Růžičková-Topolova. On the relative inhomogeneity of long-term series of sunspot indices. Bull. Astron. Inst. Czech., 31, 267–283, 1980. [Google Scholar]
- Leussu, R., I.G. Usoskin, R. Arlt, and K. Mursula. Inconsistency of the Wolf sunspot number series around 1848. A&A, 559, A28, 2013, DOI: 10.1051/0004-6361/201322373, 4 pp. [NASA ADS] [CrossRef] [EDP Sciences] [Google Scholar]
- Lockwood, M., M.J. Owens, and L. Barnard. Centennial variations in sunspot number, open solar flux, and streamer belt width: 1. Correction of the sunspot number record since 1874. J. Geophys. Res., 119, 5172–5182, 2014a, DOI: 10.1002/2014JA019970. [NASA ADS] [CrossRef] [Google Scholar]
- Lockwood, M., M.J. Owens, and L. Barnard. Centennial variations in sunspot number, open solar flux, and streamer belt width: 2. Comparison with the geomagnetic data. J. Geophys. Res., 119, 5183–5192, 2014b, DOI: 10.1002/2014JA019972. [NASA ADS] [CrossRef] [Google Scholar]
- Lockwood, M., M.J. Owens, L. Barnard, and I.G. Usoskin. Tests of sunspot number sequences: 3. Effects of regression procedures on the calibration of historic sunspot data. Sol. Phys., 291, 2829–2841, 2016a, DOI: 10.1007/s11207-015-0829-2. [NASA ADS] [CrossRef] [Google Scholar]
- Lockwood, M., M.J. Owens, L. Barnard, and I.G. Usoskin. An assessment of sunspot number data composites over 1845–2014. Astrophys. J., 824, 54, 2016b, DOI: 10.3847/0004-637X/824/1/54, 17 pp. [NASA ADS] [CrossRef] [Google Scholar]
- Muscheler, R., F. Adolphi, K. Herbst, and A. Nilsson. The revised sunspot record in comparison to cosmogenic radionuclide-based solar activity reconstructions. Sol. Phys., 291, 3025–3043, 2016, DOI: 10.1007/s11207-016-0969-z. [NASA ADS] [CrossRef] [Google Scholar]
- Owens, M.J., E. Cliver, K.G. McCracken, J. Beer, L. Barnard, et al. Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions. J. Geophys. Res., 121, 6048–6063, 2016, DOI: 10.1002/2016JA022529 [CrossRef] [Google Scholar]
- Riley, P., R. Lionello, J.A. Linker, E. Cliver, and A. Balogh, et al. Inferring the structure of the solar corona and inner heliosphere during the maunder minimum using global thermodynamic magnetohydrodynamic simulations. Astrophys. J., 802, 105, 2015, DOI: 10.1088/0004-637X/802/2/105, 14 pp. [NASA ADS] [CrossRef] [Google Scholar]
- Sarychev, A.P. and E.M. Roshchina Comparison of three solar activity indices based on sunspot observations. Solar Sys. Res., 43, 151–157, 2009, DOI: 10.1134/S0038094609020087. [NASA ADS] [CrossRef] [Google Scholar]
- Steinhilber, F., J.A. Abreu, J. Beer, I. Brunner, and M. Christl, et al. 9,400 years of cosmic radiation and solar activity from ice cores and tree rings. Proc. Natl. Acad. Sci. USA, 109 (16), 5967–5971, 2012, DOI: 10.1073/pnas.1118965109. [NASA ADS] [CrossRef] [Google Scholar]
- Solanki, S.K., I.G. Usoskin, B. Kromer, M. Schüssler, and J. Beer. Unusual activity of the Sun during recent decades compared to the previous 11,000 years. Nature, 431, 1084–1087, 2004, DOI: 10.1038/nature02995. [NASA ADS] [CrossRef] [PubMed] [Google Scholar]
- Svalgaard, L. Updating the Historical Sunspot Record. In: S.R., Cranmer, J.T. Hoeksema, and J.L. Kohl, Editors. Understanding a peculiar solar minimum, ASP Conference Series 428. San Francisco: Astron. Society Pacific, pp. 297–305, 2010. [Google Scholar]
- Svalgaard, L. How well do we know the sunspot number? In: C.H., Mandrini, and D.F. Webb, Editors. Comparative Magnetic Minima: Characterizing Quiet Times in the Sun and Stars, IAU Symposium, vol. 286, 27–33, Cambridge: Cambridge University Press, 2012, DOI: 10.1017/S1743921312004590. [Google Scholar]
- Svalgaard, L.A. Recount of sunspot groups on Staudach’s drawings. Sol. Phys., 292, 4, 2016, DOI: 10.1007/s11207-016-1023-x, 9 pp. [CrossRef] [Google Scholar]
- Svalgaard, L., and K.H. Schatten. Reconstruction of the sunspot group number: the backbone method. Sol. Phys., 291, 2653–2684, 2016, DOI: 10.1007/s11207-015-0815-8. [NASA ADS] [CrossRef] [Google Scholar]
- Svalgaard, L., M. Cagnotti, and S. Cortesi. The effect of sunspot weighting, Sol. Phys., 292, 34, 2017, DOI: 10.1007/s11207-016-1024-9, 19 pp. [NASA ADS] [CrossRef] [Google Scholar]
- Usoskin, I.G. A history of solar activity over millenia. Living Rev. Sol. Phys., 10, 1, 2013, DOI: 10.12942/lrsp-2013-1. [NASA ADS] [CrossRef] [Google Scholar]
- Usoskin, I.G., S.K. Solanki, and G.A. Kovaltsov. Grand minima and maxima of solar activity: new observational constraints. A&A, 471, 301–309, 2007, DOI: 10.1051/0004-6361:20077704. [NASA ADS] [CrossRef] [EDP Sciences] [Google Scholar]
- Usoskin, I.G., R. Arlt, E. Asvestar, E. Hawkins, and M. Käpylä, et al. The Maunder minimum (1645–1715) was indeed a grand minimum: a reassessment of multiple datasets. A&A, 581, A95, 2015, DOI: 10.1051/0004-6361/201526652, 19 pp. [NASA ADS] [CrossRef] [EDP Sciences] [Google Scholar]
- Usoskin, I.G., G.A. Kovaltsov, M. Lockwood, K. Mursula, M. Owens, and S.K. Solanki. A new calibrated sunspot group series since 1749: statistics of active day fractions. Sol. Phys., 291, 2685–2708, 2016a, DOI: 10.1007/s11207-015-0838-1. [NASA ADS] [CrossRef] [Google Scholar]
- Usoskin, I.G., G.A. Kovaltsov, and T. Chatzistergos. Dependence of the Sunspot-group size on the level of solar activity and its influence on the calibration of solar observers. Sol. Phys., 291, 3793–3805, 2016b, DOI: 10.1007/s11207-016-0993-z. [NASA ADS] [CrossRef] [Google Scholar]
- Vaquero, J.M. Historical sunspot observations: a review. Adv. Space Res., 40, 929–9411, 2007, DOI: 10.1016/j.asr.2007.01.087. [NASA ADS] [CrossRef] [Google Scholar]
- Vaquero, J.M., and M.C. Gallego. Reconstructing past solar activity using meridian solar observations: the case of the Royal Observatory of the Spanish Navy (1833–1840). Adv. Space Res., 53, 1162–1168, 2014, DOI: 10.1016/j.asr.2014.01.015. [NASA ADS] [CrossRef] [Google Scholar]
- Vaquero, J.M., M.C. Gallego, I.G. Usoskin, and G.A. Kovaltsov.Revisited Sunspot data: a new scenario for the onset of the maunder minimum. Astrophys. J., 731, L24, 2011, DOI: 10.1088/2041-8205/731/2/L24, 4 pp. [NASA ADS] [CrossRef] [Google Scholar]
- Vaquero, J.M., R.M. Trigo, M.C. Gallego, and F. Dominguez-Castro. Improving sunspot records: solar drawings of the late 19th Century from the Royal Astronomical Observatory of Lisbon. Observatory, 132, 376–384, 2012. [Google Scholar]
- Vaquero, J.M., L. Svalgaard, V.M.S. Carrasco, F. Clette, L. Lefèvre, M.C. Gallego, R. Arlt, A.J.P. Aparicio, J.-G. Richard, and R.A. Howe. Revised collection of sunspot group numbers. Sol. Phys., 291, 3061–3074, 2016, DOI: 10.1007/s11207-016-0982-2. [NASA ADS] [CrossRef] [Google Scholar]
- Waldmeier, M. Chromosphärische Eruptionen. I. Zeitschrift für Astrophysik, 16, 276–290, 1938, ADS: http://adsabs.harvard.edu/abs/1938ZA.....16..276W [Google Scholar]
- Willis, D.M., H.E. Coffey, R. Henwood, E.H. Erwin, D.V. Hoyt, M.N. Wild, and W.F. Denig. The Greenwich photo-heliographic results (1874–1976): summary of the observations, applications, datasets, definitions and errors. Sol. Phys., 288, 117–139, 2013a, DOI: 10.1007/s11207-013-0311-y. [NASA ADS] [CrossRef] [Google Scholar]
- Willis, D.M., R. Henwood, M.N. Wild, H.E. Coffey, W.F. Denig, E.H. Erwin, and D.V. Hoyt. The Greenwich photo-heliographic results (1874–1976): procedures for checking and correcting the sunspot digital datasets. Sol. Phys., 288, 141–156, 2013b, DOI: 10.1007/s11207-013-0312-x. [NASA ADS] [CrossRef] [Google Scholar]
- Willis, D.M., M.N. Wild, and J.S. Warburton. Re-examination of the daily number of sunspot groups for the royal observatory, Greenwich (1874–1885). Sol. Phys., 291, 2519–2552, 2016a, DOI: 10.1007/s11207-016-0856-7. [NASA ADS] [CrossRef] [Google Scholar]
- Willis, D.M., M.N. Wild, G.M. Appleby, and L.T. Macdonald. The Greenwich photo-heliographic results (1874–1885): observing telescopes, photographic processes and solar images. Sol. Phys., 291, 2553–2586, 2016b, DOI: 10.1007/s11207-016-0894-1. [CrossRef] [Google Scholar]
- Wolf, R. Sonnenflecken Beobachtungen in der zweiten Hälfte des Jahres 1850. Mitt. Nat. Forsch. Ges. Bern, 207, 89–95, 1851. [Google Scholar]
- Wolf, R. Beobachtungen der Sonnenflecken in den Jahren 1849–1855. Astron. Mitteil. Eidgn. Sternw. Zürich, 1, 3–13, 1856. [Google Scholar]
- Wolf, R. Beobachtungen über die Sonnenflecken im Jahre 1856. Astron. Mitt. Zürich, 3, 31, 1857. [Google Scholar]
- Wolfer, A. Beobachtungen der Sonnenflecken im Jahre 1894. Astron. Mitt. Zürich, 86, 190, 1895. [Google Scholar]
- Zolotova, N.V., and D.I. Ponyavin. The Maunder minimum is not as grand as it seemed to be. Astrophys. J., 800, 14, 2015, DOI: 10.1088/0004-637X/800/1/42, 14 pp. [NASA ADS] [CrossRef] [Google Scholar]
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