Measurement of 10Be in 1,000- and 5,000-year-old Antarctic ice

Raisbeck, G. M.; Yiou, F.; Fruneau, M.; Lieuvin, M.; Loiseaux, J.M.

doi:10.1038/275731a0

Cited by 57 publications

(16 citation statements)

References 7 publications

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“…There is a range of estimates for the global average production of 10 Be of between 0.1 Â 10 6 atoms/(cm 2 yr) (from deposition rates in ice cores (Raisbeck et al, 1978)) and 1.6 Â 10 6 atoms/(cm 2 yr) (from precipitation collection (Somayajulu et al, 1984)). Intermediate values were obtained from theoretical calculations (Lal and Peters, 1967) and lake sediments (Brown et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

The dissolved Beryllium isotope composition of the Arctic Ocean

Porcelli

Andersson

Baskaran

et al. 2009

Geochimica et Cosmochimica Acta

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Section: Introductionmentioning

confidence: 99%

The dissolved Beryllium isotope composition of the Arctic Ocean

Porcelli

Andersson

Baskaran

et al. 2009

Geochimica et Cosmochimica Acta

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“…Raisbeck et al, 1978). 10 Be records have now been produced from multiple polar ice core sites, in both Greenland (e.g., Dye 3, GRIP, GISP2, Renland (Beer et al, 1990(Beer et al, , 1991Yiou et al, 1997;Finkel and Nishiizumi, 1997;Aldahan et al, 1998;Heikkilä et al, 2008b)) and Antarctica (e.g., Dome Concordia, South Pole, Dome Fuji, Taylor Dome, Queen Maud Land, Dronning Maud Land and Law Dome (Raisbeck et al, 1990;Steig et al, 1996;Aldahan et al, 1998;Smith et al, 2000;Moraal et al, 2005;Pedro et al, 2006;Horiuchi et al, 2008;Pedro et al, 2009)).…”

Section: J B Pedro Et Al: High Resolution 10 Be In Law Dome Icementioning

confidence: 99%

High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends

et al. 2011

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Abstract. Three near-monthly resolution 10 Be records are presented from the Dome Summit South (DSS) ice core site, Law Dome, East Antarctica. The chemical preparation and Accelerator Mass Spectrometer (AMS) measurement of these records is described. The reproducibility of 10 Be records at DSS is assessed through intercomparison of the ice core data with data from two previously published and contemporaneous snow pits. We find generally good agreement between the five records, comparable to that observed between other trace chemical records from the site. This result allays concerns raised by a previous Antarctic study (Moraal et al., 2005) about poor reproducibility of ice core 10 Be records. A single composite series is constructed from the three ice cores providing a monthly-resolved record of 10 Be concentrations at DSS over the past decade (1999 to 2009). To our knowledge, this is the first published ice core data spanning the recent exceptional solar minimum of solar cycle 23. 10 Be concentrations are significantly correlated to the cosmic ray flux recorded by the McMurdo neutron monitor (r xy = 0.64, with 95 % CI of 0.53 to 0.71), suggesting that solar modulation of the atmospheric production rate may explain up to ∼40 % of the variance in 10 Be concentrations at DSS. Sharp concentration peaks occur in most years during the summer-to-autumn, possibly caused by stratospheric incursions. Our results underscore the presence of both production and meteorological signals in ice core 10 Be data.

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“…However, in detail the records deviate from each other. Figure 1 shows the 10 Be concentrations measured in ice at four different sites, Dye3 (Beer et al, 1990) and Milcent (Beer et al, 1988a) in Greenland and Dome Concordia and the South Pole in Antarctica (Bard et al, 1997;Raisbeck et al, 1978; Published by Copernicus Publications on behalf of the European Geosciences Union. 2798 U.…”

Section: Introductionmentioning

confidence: 99%

“…Heikkilä et al: 10 Be,7 Be modeled during Maunder Minimum . 10 Be concentrations measured in ice at two Greenlandic stations (Dye3 (Beer et al, 1990) and Milcent (Beer et al, 1988a)) and two Antarctic stations (South Pole and Dome Concordia (Bard et al, 1997;Raisbeck et al, 1978;Raisbeck et al, 1990)) and the 14 C production rate derived from tree rings. The data has been standardized and filtered with a 50-year low-pass filter because of the different temporal resolution of the data.…”

Section: Introductionmentioning

confidence: 99%

Modeling cosmogenic radionuclides <sup>10</sup>Be and <sup>7</sup>Be during the Maunder Minimum using the ECHAM5-HAM General Circulation Model

2008

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Abstract. All existing 10Be records from Greenland and Antarctica show increasing concentrations during the Maunder Minimum period (MM), 1645–1715, when solar activity was very low and the climate was colder (little ice age). In detail, however, the 10Be records deviate from each other. We investigate to what extent climatic changes influence the 10Be measured in ice by modeling this period using the ECHAM5-HAM general circulation model. Production calculations show that during the MM the mean global 10Be production was higher by 32% than at present due to lower solar activity. Our modeling shows that the zonally averaged modeled 10Be deposition flux deviates by only ~8% from the average increase of 32%, indicating that climatic effects are much smaller than the production change. Due to increased stratospheric production, the 10Be content in the downward fluxes is larger during MM, leading to larger 10Be deposition fluxes in the subtropics, where stratosphere-troposphere exchange (STE) is strongest. In polar regions the effect is small. In Greenland the deposition change depends on latitude and altitude. In Antarctica the change is larger in the east than in the west. We use the 10Be/7Be ratio to study changes in STE. We find larger change between 20° N–40° N during spring, pointing to a stronger STE in the Northern Hemisphere during MM. In the Southern Hemisphere the change is small. These findings indicate that climate changes do influence the 10Be deposition fluxes, but not enough to significantly disturb the production signal. Climate-induced changes remain small, especially in polar regions.

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Measurement of 10Be in 1,000- and 5,000-year-old Antarctic ice

Cited by 57 publications

References 7 publications

The dissolved Beryllium isotope composition of the Arctic Ocean

The dissolved Beryllium isotope composition of the Arctic Ocean

High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends

Modeling cosmogenic radionuclides <sup>10</sup>Be and <sup>7</sup>Be during the Maunder Minimum using the ECHAM5-HAM General Circulation Model

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Measurement of 10Be in 1,000- and 5,000-year-old Antarctic ice

Cited by 57 publications

References 7 publications

The dissolved Beryllium isotope composition of the Arctic Ocean

The dissolved Beryllium isotope composition of the Arctic Ocean

High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends

Modeling cosmogenic radionuclides &lt;sup&gt;10&lt;/sup&gt;Be and &lt;sup&gt;7&lt;/sup&gt;Be during the Maunder Minimum using the ECHAM5-HAM General Circulation Model

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Modeling cosmogenic radionuclides <sup>10</sup>Be and <sup>7</sup>Be during the Maunder Minimum using the ECHAM5-HAM General Circulation Model