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Constraints on long...
Constraints on long-term changes in solar activity from the range of variability of cosmogenic radionuclide records
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- Muscheler, R. (author)
- Lund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kvartärgeologi,Geologiska institutionen,Centre for Environmental and Climate Science (CEC),Faculty of Science,Quaternary Sciences,Department of Geology
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- Heikkilä, U. (author)
- Australian Nuclear Science and Technology Organisation,Bjerknes Centre for Climate Research
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(creator_code:org_t)
- 2011-09-08
- 2011
- English 10 s.
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In: Astrophys. Space Sci. Trans.. - : Copernicus GmbH. - 1810-6536. ; 7:3, s. 355-364
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Abstract
Subject headings
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- There is a variety of different cosmogenicradionuclide-based reconstructions of solar activity varia-tions for the past. Especially the longer-term changes andthe absolute levels of past solar activity are uncertain as it isillustrated by the differences between these reconstructions.On the one hand there are differences between10Be and14Crecords that are commonly used as proxies for the varying so-lar modulation of galactic cosmic rays. On the other hand es-timates of past changes in the geomagnetic shielding also in-clude relatively large uncertainties. Here, we concentrate onvariations in cosmogenic radionuclide records on time scalesof 50 to 500 yr. We show that these are to a large extentindependent of the geomagnetic field intensity. The rangeof variability of cosmogenic radionuclide records allows usto set constraints about long-term changes in solar activity.These records indicate that present solar activity levels werereached or exceeded regularly in the past
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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