A 600-year annual 10Be record from the NGRIP ice core, Greenland

Berggren, Ann-Marie,1969-Uppsala universitet,Luft-, vatten- och landskapslära (author)

Despite the extensive use of 10Be as the most significant information source on past solar activity, there has been only one record (Dye-3, Greenland) providing annual resolution over several centuries. Here we report a new annual resolution 10Be record spanning the period 1389-1994 AD, measured in an ice core from the NGRIP site in Greenland. NGRIP and Dye-3 10Be exhibits similar long-term variability, although occasional short term differences between the two sites indicate that at least two high resolution 10Be records are needed to assess local variations and to confidently reconstruct past solar activity. A comparison with sunspot and neutron records confirms that ice core 10Be reflects solar Schwabe cycle variations, and continued 10Be variability suggests cyclic solar activity throughout the Maunder and Spörer grand solar activity minima. Recent 10Be values are low; however, they do not indicate unusually high recent solar activity compared to the last 600 years.

Beer, JuergSwiss Federal Institute of Aquatic Science and Technology (author)
Possnert, GöranUppsala universitet,Jonfysik,Tandemlaboratoriet(Swepub:uu)gpo27116 (author)
Aldahan, AlaUppsala universitet,Luft-, vatten- och landskapslära(Swepub:uu)alaaldah (author)
Kubik, PeterETH, Zurich, Switzerland (author)
Christl, MarcusETH, Zurich, Switzerland (author)
Johnsen, Sigfús J.Niels Bohr Institute, Copenhagen, Denmark (author)
Abreu, JoséEawag, Zurich, Switzerland (author)
Vinter, Bo M.Niels Bohr Institute, Copenhagen, Denmark (author)
Uppsala universitetLuft-, vatten- och landskapslära (creator_code:org_t)

By the author/editor: Berggren, Ann-Ma ...; Beer, Juerg; Possnert, Göran; Aldahan, Ala; Kubik, Peter; Christl, Marcus; show more...; Johnsen, Sigfús ...; Abreu, José; Vinter, Bo M.; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Subatomic Physic ...

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