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

atmospheric chemistry and physics

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