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(a) Vertical distribution of SOx (SO2 + SO42-) concentrations averaged over the area north of 75°N, and (b) contributions from the different sources(a) Vertical distribution of SOx (SO2 + SO42-) concentrations averaged over the area north of 75°N, and (b) contributions from the different sources |
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Model calculations of ground level yearly average sulfur dioxide air concentration on the Kola PeninsulaModel calculations of ground level yearly average sulfur dioxide air concentration on the Kola Peninsula |
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Summer and winter visibility observations (for relative humidities less than 80%) for the period 1951 to 1993 in North AmericaSummer and winter visibility observations (for relative humidities less than 80%) for the period 1951 to 1993 in North America |
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The time series of light scattering (?sp) and optical depth (?) at 500 nm at Barrow, AlaskaThe time series of light scattering (?sp) and optical depth (?) at 500 nm at Barrow, Alaska |
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Model calculations of total (wet and dry) deposition estimates of sulfur for 1988Model calculations of total (wet and dry) deposition estimates of sulfur for 1988 |
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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°NVertical 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 [..] |
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Development of a type 1 ozone anomaly The series of satellite images show total column ozone for a period of days spanning 6-26 January 1996Development of a type 1 ozone anomaly The series of satellite images show total column ozone for a period of days spanning 6-26 January 1996 |
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Trends in (annual average) ozone mixing ratio over Canada from 1980 to 1993Trends in (annual average) ozone mixing ratio over Canada from 1980 to 1993 |
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Ozone soundings at Gardermoen, southern Norway, 27 January 1992 The green line denotes the partial pressure of ozone observed during the (type 1) anomaly, when low-ozone air passed over the areaOzone soundings at Gardermoen, southern Norway, 27 January 1992 The green line denotes the partial pressure of ozone observed during the (type 1) anomaly, when low-ozone air passed over the area |
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An example of a type 2 ozone anomaly, showing levels of ozone depletion relative to the long-term meanAn example of a type 2 ozone anomaly, showing levels of ozone depletion relative to the long-term mean |
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Ozone soundings at Sodankylä, Finland, 23 March 1995 The green line denotes the profile of partial pressure of ozone observed during the (type 2) anomaly The red line shows the monthly mean ozone profile for MarchOzone soundings at Sodankylä, Finland, 23 March 1995 The green line denotes the profile of partial pressure of ozone observed during the (type 2) anomaly The red line shows the monthly mean ozone [..] |
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Arctic sea-level atmospheric pressure (July)Mean atmospheric sea-level pressure (mb) in the Arctic in July |
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Precipitation in the ArcticDistribution of precipitation (mm/y) in the Arctic |
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Arctic atmospheric circulationThe mean circulation of the lower atmosphere during January and July as depicted by mean streamlines of the resultant winds |
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Arctic air masses and atmospheric transport routesThe mean position of the Arctic air mass in winter (January) and summer (July), superimposed on the (summer value % (orange) - winter value % (blue)) frequency of major south-to-north transport routes [..] |
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