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Groundwater in permafrost

Occurrence of groundwater in permafrost areas
Groundwater in permafrost

Circumpolar permafrost distribution

Circumpolar permafrost distribution
Circumpolar permafrost distribution

Polygon development

Low-center and high-center polygon development
Polygon development

Low and high-center polygons

Low and high-center polygons
Low and high-center polygons

Peat mound bog

Cross-section of a peat mound bog
Peat mound bog

Conceptual model of the terrestrial/freshwater compartment showing the main subcompartments and contaminant transfers, and exchanges with the atmosphere and oceans

Conceptual model of the terrestrial/freshwater compartment showing the main subcompartments and contaminant transfers, and exchanges with the atmosphere and oceans
Conceptual model of the terrestrial/freshwater compartment showing the main subcompartments and contaminant transfers, and exchanges with the atmosphere and oceans

Biogeographical zones within the AMAP assessment area, a) High Arctic, b) Low Arctic, c) subarctic, and d) boreal forest

Biogeographical zones within the AMAP assessment area, a) High Arctic, b) Low Arctic, c) subarctic, and d) boreal forest
Biogeographical zones within the AMAP assessment area, a) High Arctic, b) Low Arctic, c) subarctic, and d) boreal forest

Concentrations of Aroclor PCBs in soils and plants (ng/g dw) associated with military radar sites in the Canadian Arctic a) Mean and maximum total PCB concentrations in soils and associated plants from remote (>20 km), background

Concentrations of Aroclor PCBs in soils and plants (ng/g dw) associated with military radar sites in the Canadian Arctic a) Mean and maximum total PCB concentrations in soils and associated plants [..]
Concentrations of Aroclor PCBs in soils and plants (ng/g dw) associated with military radar sites in the Canadian Arctic a) Mean and maximum total PCB concentrations in soils and associated plants from remote (>20 km), background

Average concentration (ng/g dw) of PCBs in Arctic lichen and mosses

Average concentration (ng/g dw) of PCBs in Arctic lichen and mosses
Average concentration (ng/g dw) of PCBs in Arctic lichen and mosses

Relative tissue concentrations of organochlorine compounds detected in lichen, and in adipose tissue of caribou and wolf at three locations in the Northwest Territories, Canada

Relative tissue concentrations of organochlorine compounds detected in lichen, and in adipose tissue of caribou and wolf at three locations in the Northwest Territories, Canada
Relative tissue concentrations of organochlorine compounds detected in lichen, and in adipose tissue of caribou and wolf at three locations in the Northwest Territories, Canada

Observed and predicted organochlorine concentrations (ng/g ww) in caribou and reindeer (Rangifer tarandus) liver All data are presented in, or were derived from data in Annex Table 6A4

Observed and predicted organochlorine concentrations (ng/g ww) in caribou and reindeer (Rangifer tarandus) liver All data are presented in, or were derived from data in Annex Table 6A4
Observed and predicted organochlorine concentrations (ng/g ww) in caribou and reindeer (Rangifer tarandus) liver All data are presented in, or were derived from data in Annex Table 6A4

Concentrations of PCB congeners relative to PCB congener 153 for lichen, caribou, and wolf in the Bathurst herd, Canada The light bars denote that the congener was not detected

Concentrations of PCB congeners relative to PCB congener 153 for lichen, caribou, and wolf in the Bathurst herd, Canada The light bars denote that the congener was not detected
Concentrations of PCB congeners relative to PCB congener 153 for lichen, caribou, and wolf in the Bathurst herd, Canada The light bars denote that the congener was not detected

Sensitivity of Arctic ecosystems to acid deposition

Sensitivity of Arctic ecosystems to acid deposition
Sensitivity of Arctic ecosystems to acid deposition

(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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