Recent declines in atmospheric mercury deposition in the Upper Midwest
Article Abstract:
Sediment core samples were used to assess atmospheric mercury deposition in the Upper Midwest. Core samples from study lakes in eastern and western Minnesota, Minneapolis and southeastern Alaska showed a decreasing pattern of atmospheric mercury deposition in the Upper Midwest while global mercury deposition, represented by samples from Alaska, showed increases in deposition. The regional discrepancy is explained by the shift to cleaner fuels by the energy industry, long distance transport of pollutants and decrease in waste incineration.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Specific surface area of snow samples determine by CH(sub4) adsorption at 77 K and estimated by optical microscopy and scanning electron microscopy
Article Abstract:
Snow can adsorb atmospheric trace gases. Measuring snow's impact on atmospheric chemistry requires knowledge of the specific surface area of snow (SSA). The results of three methods for measuring or estimating the specific surface area of snow are compared: CH(sub4) adsorption at 77 K, optical microscopy, and scanning electron microscopy (SEM), used only on two samples). The results indicate that methane adsorption yields more reliable results.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
Elemental mercury in the atmosphere of a tropical Amazonian forest (French Guiana)
Article Abstract:
University researchers investigated the presence of gaseous mercury from an Amazonian forest in the French Guiana suggesting the gold mining at river basins may contribute to Hg's presence in the atmosphere.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Evidence for a decline in atmospheric emissions of PCDD/Fs in the U.K. Isotopic character of lead deposited from the atmosphere at a grassland site in the United Kingdom since 1860
- Abstracts: Crossed lines in the brick factory. Empires on the moon. Crystallography of a golf ball
- Abstracts: Greentime in America? Your own place in the sun. Straight shooters
- Abstracts: Flying circus. Power to the people. Green gasoline
- Abstracts: Drink and be merry. The painted bird. Whale weight watching