Scatterplots for comparisons between the average concentrations of SO2 and SO4 in air from October 1990 to December 1993 as monitored by the European Monitoring and Evaluation Programme (EMEP) and [..]
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Calculated concentrations of SO2 and SO42- compared with measurements at Station Nord in northeastern Greenland
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The predicted (1988) average surface air sulfate concentrations in the Arctic
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The predicted (1988) average surface air sulfur dioxide concentrations in the Arctic
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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
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Model 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 America
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The 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 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 [..]
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Monthly snow cover anomalies over northern hemispheric lands (including Greenland) between January 1972 and August 1995 Also shown are the 12-month running anomalies of hemispheric snow extent, [..]
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Snow cover over northern hemisphere lands between 1972 and 1996 for different seasons Values are determined from analyses of NOAA snow charts created using visible satellite imagery
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History of temperature changes in central Greenland over the last 40 000 years, from the GISP2 core, showing very large and probably abrupt changes
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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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History of snow accumulation in central Greenland during the most recent glaciation, as measured in the GISP2 core The 25-year running mean, represented in all panels, shows very large and rapid [..]
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