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a) The annual (1973-1990) and mean annual hydrographs for the Mackenzie River above the Arctic Red River, NWT, Canada, indicating the dominance of the spring freshet in May

a) The annual (1973-1990) and mean annual hydrographs for the Mackenzie River above the Arctic Red River, NWT, Canada, indicating the dominance of the spring freshet in May
a) The annual (1973-1990) and mean annual hydrographs for the Mackenzie River above the Arctic Red River, NWT, Canada, indicating the dominance of the spring freshet in May

Advanced Very High Resolution Radiometer (AVHRR) satellite image (June 4, 1986) showing a color composite of the visible data band for the Mackenzie Delta River water overflowing the landfast ice can be seen as purple regions

Advanced Very High Resolution Radiometer (AVHRR) satellite image (June 4, 1986) showing a color composite of the visible data band for the Mackenzie Delta River water overflowing the landfast ice can [..]
Advanced Very High Resolution Radiometer (AVHRR) satellite image (June 4, 1986) showing a color composite of the visible data band for the Mackenzie Delta River water overflowing the landfast ice can be seen as purple regions

River break-up in the Arctic

Mean dates of river break-up in the Arctic; month number in Roman numerals
River break-up in the Arctic

River freeze-up in the Arctic

Mean dates of river freeze-up in the Arctic
River freeze-up in the Arctic

Annual average of sulfate and base cation concentrations as measured in rivers in northern Fennoscandia and the Kola Peninsula Note: SO4 (non-seasalt) estimated for river Utsjoki from total sulfur

Annual average of sulfate and base cation concentrations as measured in rivers in northern Fennoscandia and the Kola Peninsula Note: SO4 (non-seasalt) estimated for river Utsjoki from total sulfur
Annual average of sulfate and base cation concentrations as measured in rivers in northern Fennoscandia and the Kola Peninsula Note: SO4 (non-seasalt) estimated for river Utsjoki from total sulfur

Median concentrations of sulfate, base cations, and nitrate in lakes of northern Fennoscandia and the Kola Peninsula

Median concentrations of sulfate, base cations, and nitrate in lakes of northern Fennoscandia and the Kola Peninsula
Median concentrations of sulfate, base cations, and nitrate in lakes of northern Fennoscandia and the Kola Peninsula

(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)

(a) Critical loads of acidity expressed as sulfur (5th percentile presented for each grid) for lakes in northern Fennoscandia and surface waters on Svalbard, and (b) their exceedance (95th percentile)

(a) Critical loads of acidity expressed as sulfur (5th percentile presented for each grid) for lakes in northern Fennoscandia and surface waters on Svalbard, and (b) their exceedance (95th percentile)
(a) Critical loads of acidity expressed as sulfur (5th percentile presented for each grid) for lakes in northern Fennoscandia and surface waters on Svalbard, and (b) their exceedance (95th percentile)

Diversity indices (Shannon-Weaver means) for phytoplankton, zooplankton and zoobenthos in lakes and streams in the Murmansk region

Diversity indices (Shannon-Weaver means) for phytoplankton, zooplankton and zoobenthos in lakes and streams in the Murmansk region
Diversity indices (Shannon-Weaver means) for phytoplankton, zooplankton and zoobenthos in lakes and streams in the Murmansk region

Shell thickness (mm) of peregrine falcon eggs representing 109 clutches produced in Rankin Inlet, NWT, Canada from 1981 to 1986 and from 1990 to 1994

Shell thickness (mm) of peregrine falcon eggs representing 109 clutches produced in Rankin Inlet, NWT, Canada from 1981 to 1986 and from 1990 to 1994
Shell thickness (mm) of peregrine falcon eggs representing 109 clutches produced in Rankin Inlet, NWT, Canada from 1981 to 1986 and from 1990 to 1994

Concentrations of PCDD/F and non-ortho and mono-ortho PCBs as TCDD equivalents (pg/g ww) in Arctic bird eggs compared to thresholds for avian effects (1 Giesy et al 1994b, 2 Nosek et al 1992, 3 Verrett 1976,

Concentrations of PCDD/F and non-ortho and mono-ortho PCBs as TCDD equivalents (pg/g ww) in Arctic bird eggs compared to thresholds for avian effects (1 Giesy et al 1994b, 2 Nosek et al 1992, 3 [..]
Concentrations of PCDD/F and non-ortho and mono-ortho PCBs as TCDD equivalents (pg/g ww) in Arctic bird eggs compared to thresholds for avian effects (1 Giesy et al 1994b, 2 Nosek et al 1992, 3 Verrett 1976,

Sum-PCB (ng/g ww) in Arctic animals as food items compared to no-effect-concentrations (NOAEC) and environmental quality guidelines for protecting fish-eating/aquatic wildlife (1 Baril et al 1990, 2 USEPA 1995,

Sum-PCB (ng/g ww) in Arctic animals as food items compared to no-effect-concentrations (NOAEC) and environmental quality guidelines for protecting fish-eating/aquatic wildlife (1 Baril et al 1990, 2 [..]
Sum-PCB (ng/g ww) in Arctic animals as food items compared to no-effect-concentrations (NOAEC) and environmental quality guidelines for protecting fish-eating/aquatic wildlife (1 Baril et al 1990, 2 USEPA 1995,

Concentrations of sum-PCB (µg/g ww) in Arctic bird eggs compared to thresholds for avian effects (1 Barron et al 1995, 2 Giesy et al 1994b, 3 Bosveld and Van den Berg 1994)

Concentrations of sum-PCB (µg/g ww) in Arctic bird eggs compared to thresholds for avian effects (1 Barron et al 1995, 2 Giesy et al 1994b, 3 Bosveld and Van den Berg 1994)
Concentrations of sum-PCB (µg/g ww) in Arctic bird eggs compared to thresholds for avian effects (1 Barron et al 1995, 2 Giesy et al 1994b, 3 Bosveld and Van den Berg 1994)

Sum-DDT (ng/g ww) in Arctic animals as food items compared to no-effect-concentrations (NOAEC) and environmental quality guidelines for protecting fish-eating/aquatic wildlife (1 Baril et al 1990, 2 USEPA 1995,

Sum-DDT (ng/g ww) in Arctic animals as food items compared to no-effect-concentrations (NOAEC) and environmental quality guidelines for protecting fish-eating/aquatic wildlife (1 Baril et al 1990, 2 [..]
Sum-DDT (ng/g ww) in Arctic animals as food items compared to no-effect-concentrations (NOAEC) and environmental quality guidelines for protecting fish-eating/aquatic wildlife (1 Baril et al 1990, 2 USEPA 1995,

Concentrations of Hg in dated sediment cores from lakes in Arctic Finland and Canada

Concentrations of Hg in dated sediment cores from lakes in Arctic Finland and Canada
Concentrations of Hg in dated sediment cores from lakes in Arctic Finland and Canada
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