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Vertical distribution of Arctic haze in summer, winter, and the whole year Sulfur air concentrations and relative source-contribution (%) for different heights above the ground are shown The concentrations are averages over the Arctic area north of 70°N

Vertical distribution of Arctic haze in summer, winter, and the whole year Sulfur air concentrations and relative source-contribution (%) for different heights above the ground are shown The [..] 		Vertical distribution of Arctic haze in summer, winter, and the whole year Sulfur air concentrations and relative source-contribution (%) for different heights above the ground are shown The concentrations are averages over the Arctic area north of 70°N

Illustration of the concept of a) the 'zone of influence' through major contaminant pathways from a major source region, and b) the 'contaminant focussing zone' resulting from the convergence of pathways carrying contaminants from a variety of sources

Illustration of the concept of a) the 'zone of influence' through major contaminant pathways from a major source region, and b) the 'contaminant focussing zone' resulting from the convergence of [..] 		Illustration of the concept of a) the zone of influence through major contaminant pathways from a major source region, and b) the contaminant focussing zone resulting from the convergence of pathways carrying contaminants from a variety of sources

(a) The contribution from the different sources to the total deposition, averaged over the area north of 75°N from October 1990 to May 1994, (b) the calculated total monthly depositions of SOx averaged over the area north of 75°N, and (c) the

(a) The contribution from the different sources to the total deposition, averaged over the area north of 75°N from October 1990 to May 1994, (b) the calculated total monthly depositions of SOx [..] 		(a) The contribution from the different sources to the total deposition, averaged over the area north of 75°N from October 1990 to May 1994, (b) the calculated total monthly depositions of SOx averaged over the area north of 75°N, and (c) the

Model calculations of total (wet and dry) deposition estimates of sulfur for 1988

Model calculations of total (wet and dry) deposition estimates of sulfur for 1988 		Model calculations of total (wet and dry) deposition estimates of sulfur for 1988

The time series of (a) weekly-averaged non-seasalt (nss) sulfate aerosol at Alert, NWT, Canada, (b) monthly-averaged sulfate aerosol at Ny Ålesund, Norway, (c) weekly-averaged nitrate at Alert, and (d) weekly-averaged hydrogen ion at Alert

The time series of (a) weekly-averaged non-seasalt (nss) sulfate aerosol at Alert, NWT, Canada, (b) monthly-averaged sulfate aerosol at Ny Ålesund, Norway, (c) weekly-averaged nitrate at Alert, and [..] 		The time series of (a) weekly-averaged non-seasalt (nss) sulfate aerosol at Alert, NWT, Canada, (b) monthly-averaged sulfate aerosol at Ny Ålesund, Norway, (c) weekly-averaged nitrate at Alert, and (d) weekly-averaged hydrogen ion at Alert

(a) Yearly average sulfur dioxide air concentration measurements in the Arctic, (b) Yearly average sulfate air concentration measurements in the Arctic

(a) Yearly average sulfur dioxide air concentration measurements in the Arctic, (b) Yearly average sulfate air concentration measurements in the Arctic 		(a) Yearly average sulfur dioxide air concentration measurements in the Arctic, (b) Yearly average sulfate air concentration measurements in the Arctic

Emission rates of sulfur dioxide from Nikel together with annual average SO2 air concentrations measured at two sites in Norway (1978-1992)

Emission rates of sulfur dioxide from Nikel together with annual average SO2 air concentrations measured at two sites in Norway (1978-1992) 		Emission rates of sulfur dioxide from Nikel together with annual average SO2 air concentrations measured at two sites in Norway (1978-1992)

Variation of the nitrate to non-seasalt (nss) sulfate equivalent ratio in precipitation at Norwegian recording stations based on measurements between August 1982 and July 1984

Variation of the nitrate to non-seasalt (nss) sulfate equivalent ratio in precipitation at Norwegian recording stations based on measurements between August 1982 and July 1984 		Variation of the nitrate to non-seasalt (nss) sulfate equivalent ratio in precipitation at Norwegian recording stations based on measurements between August 1982 and July 1984

Concentrations of (a) sulfate and (b) nitrate in snow

Concentrations of (a) sulfate and (b) nitrate in snow 		Concentrations of (a) sulfate and (b) nitrate in snow

Concentrations of sum-HCH in Arctic air

Concentrations of sum-HCH in Arctic air 		Concentrations of sum-HCH in Arctic air

Source regions for HCH, chlordane, toxaphene, and PCBs in Arctic air based on 5-day back-trajectories for elevated air concentrations at Tagish, Alert, and Ny-Ålesund

Source regions for HCH, chlordane, toxaphene, and PCBs in Arctic air based on 5-day back-trajectories for elevated air concentrations at Tagish, Alert, and Ny-Ålesund 		Source regions for HCH, chlordane, toxaphene, and PCBs in Arctic air based on 5-day back-trajectories for elevated air concentrations at Tagish, Alert, and Ny-Ålesund

Concentrations of sum-PCB in Arctic air (sum of CBs 28, 31, 52, 101, 105, 118, 138, 153, 156, 180)

Concentrations of sum-PCB in Arctic air (sum of CBs 28, 31, 52, 101, 105, 118, 138, 153, 156, 180) 		Concentrations of sum-PCB in Arctic air (sum of CBs 28, 31, 52, 101, 105, 118, 138, 153, 156, 180)

Flux of HCH and sum-PCB (sum of 10 congeners) in precipitation at Heimaey Island, Iceland

Flux of HCH and sum-PCB (sum of 10 congeners) in precipitation at Heimaey Island, Iceland 		Flux of HCH and sum-PCB (sum of 10 congeners) in precipitation at Heimaey Island, Iceland

PBDEs in Arctic air

PBDEs in Arctic air. Particles in Arctic haze allow BFRs to transport to the Arctic from more southerly source regions. This may include DecaBDE, which was previously thought not to transport over [..] 		PBDEs in Arctic air

Arctic sea-level atmospheric pressure (July)

Mean atmospheric sea-level pressure (mb) in the Arctic in July 		Arctic sea-level atmospheric pressure (July)
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