Variations in Solar Activity Across the Spörer Minimum Based on Radiocarbon in Danish Oak
| Autor: | Mads Faurschou Knudsen, Alexandra Fogtmann-Schulz, Claudia Baittinger, Sabrina G K Kudsk, Christoffer Karoff, Jesper V. Olsen, Pernille L. K. Trant |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Fogtmann-Schulz, A, Kudsk, S G K, Trant, P L K, Baittinger, C, Karoff, C, Olsen, J & Knudsen, M F 2019, ' Variations in Solar Activity Across the Spörer Minimum Based on Radiocarbon in Danish Oak ', Geophysical Research Letters, vol. 46, no. 15, pp. 8617-8623 . https://doi.org/10.1029/2019GL083537 Fogtmann-Schulz, A, Gjødvad Kaiser Kudsk, S, Trant, P L K, Baittinger, C, Karoff, C, Olsen, J & Knudsen, M F 2019, ' Variations in Solar Activity Across the Spörer Minimum Based on Radiocarbon in Danish Oak ', Geophysical Research Letters, vol. 46, no. 15, pp. 8617-8623 . https://doi.org/10.1029/2019GL083537 |
| Popis: | Several aspects concerning the origin and nature of grand solar minima remain unclear, and more high-resolution 10Be and 14C records are needed to improve our understanding of these phenomena. Here, we report 137 new high-precision, annually resolved radiocarbon concentrations based on oak from the Danish dendrochronology. The new record covers a period (CE 1432–1578) that encompasses most of the penultimate grand solar minima known as the Spörer Minimum. A detailed comparison between the Spörer and Maunder (CE 1640–1720) minima shows that the Spörer Minimum is associated with enhanced Δ14C variability in a band centered around the 11-year Schwabe cycle from CE 1450 to 1479 and between CE 1545 and 1578, whereas little 11-year variability is observed from CE 1479 to 1539. In contrast, we only observe enhanced 11-year variability after the end of the Maunder Minimum at CE 1722–1744, which could indicate that the nature and origin of the two minima were different. |
| Databáze: | OpenAIRE |
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