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(a) Critical deposition of sulfur, and (b) its exceedance, in forest soils of northern Europe and Russia (5th percentile of the calculation points in each EMEP grid cell)

(a) Critical deposition of sulfur, and (b) its exceedance, in forest soils of northern Europe and Russia (5th percentile of the calculation points in each EMEP grid cell)
(a) Critical deposition of sulfur, and (b) its exceedance, in forest soils of northern Europe and Russia (5th percentile of the calculation points in each EMEP grid cell)

Schematic illustration of ecosystem carbon fluxes and nutrient circulation in the tundra Carbon and nutrient pathways are shown by dashed and continuous lines, respectively

Schematic illustration of ecosystem carbon fluxes and nutrient circulation in the tundra Carbon and nutrient pathways are shown by dashed and continuous lines, respectively
Schematic illustration of ecosystem carbon fluxes and nutrient circulation in the tundra Carbon and nutrient pathways are shown by dashed and continuous lines, respectively
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