【土壤矿物损耗驱动早全新世湖泊酸化】John BoyleRichard Chiverrell Andrew Plater Ian Thrasher Emily BradshawHilary Birks andJohn Birks.Soil mineral depletion drives early Holocene lake acidification. Geology 2013 v. 41 no. 4 p. 415-418

Abstract

In recent decades explanations for post-glacial lake acidification have focused on changing climate and biotic factors. Here we present a unique lake sediment data set combining diatom-inferred acidity reconstruction with detailed quantitative assessment of soil base dynamics that challenges this view. We show at Kråkenes Lake in Norway that historical development of soil mineral depletion inferred from the lake sediment record is consistent with the extent and timing of early Holocene acidification. The lake-water acidification can be fully accounted for by abiotic soil mineral depletion suggesting a lesser role for alternative acidifying mechanisms such as direct climate impacts and successional changes in organic acid production. There are at present few comparable data sets but those that exist suggest similar rates of soil base depletion. As this acidification is not confined to water abiotic mineral depletion is likely also to impact terrestrial ecosystems and dynamic vegetation models that exclude irreversible mineral depletion will fail to capture an important element of global ecology.

【二氧化碳浓度升高与生物大灭绝有关】F. Parrenin V. Masson-Delmotte P. Köhler D. Raynaud D. Paillard